MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
05. (Electrical Instruments and
Measurements)
1. (Introduction to Electrical Measuring
Instruments)
(LMRC 2015)
1. Hot wire ammeters are used for measuring:
(a) Only a.c.
(b) Only d.c
(c) Neither a.c nor d.c
(d) Both a.c. and d.c.
(SSC JE 2008)
2. Which of the following meters is an
integrating type instrument?
(a) Ammeter
(b) Voltmeter
(c) Wattmeter
(d) Energy meter
(SSC JE 2007)
3. Which of the following instruments is an
integrating type instrument?
(a) Wattmeter
(b) Energy Meter
(c) Power Factor Meter
(d) None of the above
(MPJE 2015)
4. An electrodynamometer type of instruments
finds its major use as
(a) Standard instrument only
(b) Transfer instrument only
(c) Both as or standard and transfer
instruments
(d) An indicator type of instrument
(UPSSSC 2015)
5. Electrostatic instruments are used for
measuring
(a) AC and DC voltage
(b) Ac voltage and current
(c) Dc voltage and current
(d) AC and DC currents
(DMRC 2014)
7. Electrostatic instruments are suitable for the
measure of:
(a) ac and dc voltages
(b) ac voltage and current
(c) dc voltage and current
(d) ac and dc current
(UPSSSC JE-2016)
8. Rectifier type instrument can b e use in-
(a) a.c.
(b) d.c.
(c) Both (a) and (d)
(d) Pulsating
(UPSSSC JE-2016)
9. Dynamometer type of instrument can use in-
(a) a.c.
(b) d.c.
(c) (b)/(a)
(d) Pulsating
(UTTARAKAHND –I 2013)
10. Which one of the following instruments is equally
accurate on ac as well as dc circuits?
(a) PMMC voltmeter
(b) Dynamometer wattmeter
(c) Moving iron ammeter
(d) Induction wattmeter
2. (Measurement and Errors)
(SSCJE 2012)
1. Which one of the following types of
instruments does suffer from error due to
magnetic hysteresis?
(a) Induction type
(b) Electrodynamics
(c) Moving Iron
(d) PMMC
(JMRC 2012)
2. A generated voltage is equally dependent on
three resistance R1 , R2 , R3 and its value
V= (R1 R2)/ (R3). If tolerance of each
resistor is 0.1%, what will be the maximum
error in voltage?
(a) 0.30%
(b) 0.3%
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(c) 0.10%
(d) 0.1%
(MPJE 2015)
3. Which one of the following statements
correctly response the systematic error?
(a) These error can be calculated from the
details of the instrument.
(b) These are the residual errors.
(c) These errors may occur controlled
conditions.
(d) These are the error committed by the
experiments.
(UPSSSC 2014)
4. Swamp resistance and condenser are used
(a) To reduce the error while measuring DC
quantities in a moving iron instrument
(b) To reduce the error while measuring AC
quantities in a moving iron instrument
(c) To reduce the error while measuring DC
quantities in a moving coil instrument
(d) None of these
(UPSSSC JE- 2016)
5. For accuracy of the instrument which is
necessary-
(a) Conformity
(b) Precision
(c) Both
(d) None of the above
(UTTARAKHAND –I 2013)
6. Energy meter runs slowly even if power is
not used. This error is called
(a) Speed error
(b) Phase error
(c) Creeping error
(d) None of these
(UTTARAKHAND –I 2013)
7. A null type of instrument as compared to a
deflecting type instrument has]
(a) Higher accuracy
(b) Lower sensitivity
(c) Faster response
(d) All of the above
(MPJE 2016 Evening Shift)
8. The efficiency of electrical machines should
be calculated by measuring-
(a) Output and input
(b) Losses and output
(c) Losses and input
(d) Losses
(DMRC 2014)
10. The ratio error in current transformer is due to:
(a) Power factor of primary
(b) Wattles component of the current in the primary
(c) Exciting currents
(d) Leakage flux
(SSCJE 2013)
11. To minimize the errors due to lead and contact
resistance, low resistance used in electrical
measurement work are provided with
(a) Guard rings
(b) Four terminals
(c) Thick insulation
(d) Metal shields
(SSCJE 2015)
12. A 150 V moving iron voltmeter of accuracy class
1.0 reads 75 V when used in a circuit under standard
condition. The mssimum possible percentage error in
the reading is:
(a) 4.0
(b) 2.0
(c) 1.0
(d) 0.5
(JMRC 2012)
13. In order to achieve accuracy, how should
the slide wire of a potentiometer be?
(a) As long as possible
(b) As short as possible
(c) Very thin
(d) Very thick
(MPJE 2015)
14. Torque/weight ratio of an instrument
indicates:
(a) Selectivity
(b) Sensitivity
(c) Accuracy
(d) Fidelity
(UTTARAKHAND –I 2013)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ 15. A 0-10 A ammeter has a guaranteed accuracy of
1% of full scale deflection, the limiting error
while reading 2.5A will be
(a) 1%
(b) 2%
(c) 4%
(d) None of these
1. (Instruments and their Requirements)
(UPRVUNL 2014)
2.A torque is developed in an electro mechanical
energy conversion device, the value of which
depends upon:
(a) stator field strength and torque angle
(b) stator field and rotor field strength
(c) stator field and rotor field strengths and the
torque angle
(d) stator field strength only
(UPRVUNL 2014)
3………………instrument is from hysteresis and
eddy current errors.
(a) Electrostatics
(b) Moving Iron
(c) Moving coil-Permanent Magnet type
(d) Moving coil dynamometer type
(DMRC 2015)
4. Moving iron instruments can be used:
(a) To measure dc currents only
(b) To measure ac currents only
(c) To measure a.c. voltage only
(d) To measure a.c. and d.c. currents and voltage
(RPHED 2015)
5.Moving coil instrument, having coil resistance of
4.5Ω gives a full scale deflection of 30 mA. The
resistance connected in parallel with this instrument
to read up to 2.5A is:
(a) 6.46Ω
(b) 0.0346Ω
(c) 0.0546Ω
(d) 0.0625Ω
(SSCJE 2014, Morning Shift)
6. In a particular meter, the operating torque is
directly proportional to the current passing
through it, then the type of meter is:
(a) Moving iron
(b) Moving coil
(c) Electrostatic
(d) Induction
(SSCJE 2013)
7. In inducting instruments the springs are
mainly used to
(a) Conduct the current to the coils
(b) Hold the pivot in position
(c) Control the pointer movement
(d) Reduce the vibration of the pointer
(SSCJE 2013)
8. To maximize the driving torque in an
induction type instrument, flux produced by
shunt coil and series coil should be
(a) In phase with each other
(b) In quadrature with each other
(c) Displaced by 45º with respect to each
other
(d) Out of phase with respect to each other
(JMRC 2013)
9. What is a Weston frequency meter?
(a) Moving coil instrument
(b) Moving iron instrument
(c) Dynamometer type instrument
(UTTARAKHAND –II 2013)
10. Indicating instruments should be
(a) Undamped
(b) Critical damped
(c) Over damped
(d) Under damped
(MPJE 2016) Evening Shift
11. The effect of stray magnetic fields on the
actuating torque of a portable instrument is
the maximum when the operating field of the
instrument and the stray fields are
(a) Perpendicular
(b) Parallel
(c) Inclined at 60º
(d) Inclined at 30º
(MPJE 2015)
12. A moving iron instrument can be used for
current and voltage measurements?
(a) In AC circuit only
(b) In DC circuits only
(c) In both AC and DC circuit
(d) None of these
(MPJE 2015)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
13. The controlling torque in power factor meter
is given by
(a) Spring control
(b) Sensor control
(c) Gravity control
(d) None of these
(MPJE 2015)
14. A 0-1 mA PMMC ammeter reads 4 mA in
circuits. Its bottom control spring snaps
suddenly. The meter will now read nearly:
(a) Zero
(b) 10 mA
(c) 2 mA
(d) 8 mA
(UPSSSC 2015)
15. Following is not an advantage of a permanent
magnet moving coil instrument
(a) It has a uniform scale
(b) It can be used without error for a
long period of time
(c) It has good damping torque
(d) Its range can be easily extended
(MPJE 2016 Morning Shift)
16. Energy savings potential of variable torque
application compared to constant torque
application is-
(a) Higher
(b) Minor
(c) Equivalent
(d) None of the above
(MPJE 2016 Morning Shift)
17. Determine the absolute error of measurement
if measured value of a resistance = 20.65Ω
and true value = 20.55Ω.
(a) 0.1Ω
(b) 0.2Ω
(c) 0.3Ω
(d) 0.4Ω
(UTTARAKHAND –I 2013)
20. The most efficient form of damping
employed in electric instruments is
(a) Air friction damping
(b) Fluid friction damping
(c) Eddy current daming
(d) None of the above
(UTTARAKHAND –I 2013)
21. The moving system of an indicating type of
electrical instrument is subjected to
(a) a deflecting torque
(b) a controlling torque
(c) a damping torque
(d) All of the above
(UTTARAKHAND –I 2013)
22. The type of instruments used mainly for
standardizing instruments in laboratories is
(a) Indicating instrument
(b) Integrating instrument
(c) Absolute instrument
(d) Recording instrument
( UPSSSC JE-2016)
23. Which torque is essential for indicating
instruments-?
(a) Deflecting
(b) Controlling
(c) Damping
(d) All of the above
(UTTARAKHAND –I 2013)
24. Moving coil instruments have which one of the
following scales?
(a) Logarithmic scale
(b) Uniform scale
(c) Non-uniform scale
(d) Squared scale
(UTTARAKHAND –I 2013)
25. The material of hair spring used in measuring
instruments is made of which of material of the
following:
(a) Copper
(b) Bronze
(c) Alnico
(d) None of these
(UPPCL 2016)
26. If a galvanometer is sensitive, it will provide
large deflection on providing-
(a) No current
(b) Large power
(c) Small current
(d) large voltage
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(SSCJE 2010)
27. Swamping resistance is used to compensate error
due to-
(a) Stray magnetic field
(b) Large supply voltage
(c) Large supply frequency
(d) Temperature variations
(UTTARAKHAND –II 2013)
1. Integration of unit ramp function gives
(a) Unit parabolic function
(b) Unit ramp function
(c) Unit doublet function
(d) None of these
(SSCJE 2014, Morning Shift)
2. If current through the operating coil of a
moving iron instrument is doubled, the
operating force becomes.
(a) One and a half times
(b) 2 times
(c) 3 times
(d) 4 times
(SSCJE 2014, Morning Shift)
3. In moving iron instruments, the iron moves
in a direction to cause
(a) Coil inductance to be constant
(b) Mutual inductance to be constant
(c) Minimum reluctance path
(d) Decrease in the flux passing through it
(SSCJE 2014, Morning Shift)
4. A moving coil instrument has a resistance of
10Ω and gives full scale deflection at 0.5 V
potential difference across it. How can it be
adopted to measure a current up to 100 A
(a) By connecting shunt resistance of
0.005Ω across the meter
(b) By connecting shunt resistance of
0.05Ω across the meter
(c) By connecting shunt resistance of 5Ω
across the meter
(d) By connecting shunt resistance of 10Ω
across the meter
(UPRVUNL 2015)
37. Which of the following statements is not an
advantage of electrodynamics instruments?
(a) Free from hysteresis errors
(b) Low power consumption
(c) Low accuracy
(d) Low sensitivity
(DMRC 2014)
38. The deflection torque can be produced by:
(a) Gravity control
(b) Spring control
(c) Air Friction
(d) Magnetically
(SSCJE 2014, Morning Shift)
39. Which of the following instruments has the
highest torque/weight ratio among the given
instruments?
(a) Attraction type MI instrument
(b) Repulsion type MI instrument
(c) Permanent magnet moving coil instrument
(d) Electrodynamometer instrument
(SSCJE 2014, EveningShift)
40. Moving coil (PNMC) and moving iron
instruments can be distinguished by observing its.
(a) range
(b) scale
(c) size of terminals
(d) pointer
(SSCJE 2013)
41. In reference to the figure, the voltage waveform
v(t) is measured by a PMMC, a PMMC combined
with bridge rectifier and a moving iron (MI)
instrument. Two lists are prepared thereafter:
Instrument list List of
instrument reading
A. PMMC i. 5
V
B. PMMC rectifier ii 2.75
V
C. M.I. iii 2.5
V
The correct option relating the instruments and
their reading is
(a) A – i, B – ii, C – iii
(b) A – iii, B – ii, C – i
(c) A – ii, B – iii, C – i
(d) A –iii, B-I, C – ii
(SSCJE 2008)
42. The scale of moving iron (M.I) instrument
ius-
(a) uniform
(b) Cramped
(c) Linear
(d) All the above
(SSCJE 2010)
43. The controlling torque in gravity controlled
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ meter is proportional to-
(a) cos θ
(b) sin θ
(c) tan θ
(d) θ
(UPSSSC 2015)
44. Damping torque is essential to
(a) Increase oscillate
(b) Reduce oscillation
(c) Maintain oscillation
(d) None of these
(UPSSSC 2015)
45. In an attraction type moving Iron instruments, the
damping torque is usually provide by
(a) Air friction damping
(b) Eddy current damping
(c) Fluid friction damping
(d) Capacitive damping
(UPSSSC JE -2016)
48. Which instruments have uniform scale-?
(a) Spring control instruments
(b) Gravity control instruments
(c) Both (a) and (b)
(d) None of the above
(UPSSSC JE -2016)
49. Watt-hour instrument is the type of-
(a) Indicting
(b) Integrating
(c) Recording
(d) None of the above
(UPSSSC JE -2016)
50. Induction type instruments are used in
(a) AC
(b) Dc
(c) Both
(d) None of the above
(UPSSSC JE -2016)
51. Which damping is most efficient-?
(a) Air friction
(b) Fluid friction
(c) Eddy current
(d) None of the above
4. (Ammeters and Voltmeters)
(UPRVUNL 2014)
2. Current in a circuit is measured using a
simple slide using. What will be voltage
drop per unit length? If the standard cell
is of emf 2.38 V balanced a length of 35
cm?
(a) 0.68 V/cm
(b) 0.068 V/cm
(c) 68 V/cm
(d) 6.8 V/cm
(DMRC 2015)
3. The measurement range of an ammeter
can be increased by using a:
(a) High resistance in shunt
(b) Low resistance in shunt
(c) High resistance in series
(d) Low resistance in series
(DMRC 2015)
4. For increasing the range of voltmeter,
one should connect a”
(a) High value resistance in series
with voltmeter
(b) Low value resistance in series with
voltmeter
(c) High value resistance in parallel
with voltmeter
(d) Low value resistance in parallel
with voltmeter
(SSCJE 2014, Evening Shift)
5. To increasing the range of an a.c.
ammeter you would use:
(a) A potential transformer
(b) An inductance across the motor
(c) A condenser across the meter
(d) Current transformer
(UPSSSC JE -2016)
6. An instrument which electric current is
known as-
(a) Voltmeter
(b) Rheostat
(c) Wattmeter
(d) Galvanometer
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(SSCJE 2014, Evening Shift)
7. A d.c. voltmeter has a sensitivity of
1000Ω/watt. When it measure half full
scale in 100 V range, the current through
the voltmeter will be:
(a) 1 mA
(b) 0.5 mA
(c) 50 mA
(d) 100 mA
(SSCJE 2014, Evening Shift)
8. Two voltmeter of (0-300 V) range are
connected in parallel to a.c. circuits. One
voltmeter is moving iron type reads 200
V. If the other is PMMC instrument, its
riding will be:
(a) Zero
(b) 222 V
(c) 127.4 V
(d) Slightly less 200 V
(SSCJE 2013)
9. If a 110 V, Hz is applied across a PMMC
voltmeter of full-scale range 0-220 V and
internal resistance of 10 kΩ, reading of
the voltmeter will be
(a) 0 V
(b) 110√2 V
(c) 78 V
(d) 55 V
(SSCJE 2013)
10. A current of i = 6+10 sin(100θ πt) + 20
sin(200 πt) is flowing through a series
combination of a PMMC and moving
iron instrument. Ratio of the two currents
as registered by the M.I. and PMMC
meter is
(a) 1.81
(b) 3.11
(c) 2.82
(d) 2.63
(SSCJE 2012)
11. A potentiometer is used to measure the
voltage between to points of a D.C.
circuit, which is found to be 1.2 V. This
is also measured by a voltmeters, which
is found to be 0.9 V. The resistance of
the voltmeter is 60 kΩ. The input
resistance between two points.
(a) 60 kΩ
(b) 20 kΩ
(c) 45 kΩ
(d) 80 kΩ
(SSCJE 2012)
12. During the measurement of a low
resistance using a potentiometer, the
following readings were obtained:
Voltage drop across unknown
Resistance = 0.531 Volt.
Voltage drop across a 0.1 Ohm standard
resistance connected in series with the
unknown = 1.083 Volt. Value of the
unknown resistor is
(a) 49.03 milliohm
(b) 108.3 milliohm
(c) 20.4 milliohm
(d) 53.1 milliohm
SSCJE 2010)
13. An ammeter is obtained by shunting a
30 Ω Galvanometer with 30 Ω
resistance. What additional shunt should
be connected across it to double the
range?
(a) 15 Ω
(b) 10 Ω
(c) 5 Ω
(d) 30 Ω
(SSCJE 2010)
14. To increase the range of a voltmeter-
(a) A low resistance is connected in
series
(b) A low resistance is connected in
parallel
(c) A high resistance is connected in
series
(d) A high resistance is connected in
parallel
(JMRC 2012)
15. What is the main purpose of
potentiometer as device for?
(a) Comparing two voltages
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(b) Comparing two currents
(c) Measuring a voltage
(d) Measuring a current
(JMRC 2012)
16. What are the main criteria to select
resistance of coils and slide wire in
Crompton potentiometer?
(a) 14 coil and slide wire all having
the same resistance
(b) 14 coils and slide wire but they
resistance of slide wire is half of that
of each coil
(c) 14 coils and slide wire all having
the different resistance
(d) 14 coils out of which 7 coils have
resistance which is twice that of
remaining 7 coils
(JMRC 2012)
17. A standard cell of 1.0185 V is used with
a slide wire potentiometer. The balance
was obtained at 60 cm. When an
unknown emf was connected, the
balance was obtained at 82 cm. What is
the magnitude of unknown emf?
(a) 1.39 V
(b) 0.79 V
(c) 13.9 V
(d) 7.45 V
(MPJE 2015)
18. A 0-15 V voltmeter has a resistance of
1000Ω, if it is desired to expand its range
0-15 V a resistance of………………….
Is connected in series with it.
(a) 3 k Ω
(b) 5 k Ω
(c) 9 k Ω
(d) 2 k Ω
(IOF 2014)
19. For increasing the range of voltmeter,
connect a
(a) Low value resistance in series with
voltmeter
(b) High value resistance in parallel
with voltmeter
(c) High value resistance in series
with voltmeter
(d) Low value resistance in parallel
with voltmeter
(UPSSSC 2014)
20. The internal resistance of a voltmeter is
20,000 ohms. If this voltmeter is
connected in series with a resistance and
a 220 volt supply is connected across the
combination, the voltmeter reads 200
volts. The value of the resistance is
(a) 200 Ω
(b) 4000 Ω
(c) 2000 Ω
(d) 20,000 Ω
(MPJE 2016, Evening Shift)
21. Which type of potentiometer consists of
two separate potentiometer circuits
enclosed in a common case?
(a) Gall Tinsley AC potentiometer
(b) Dry dale Tinsley AC potentiometer
(c) Campbell Larsen potentiometer
(d) Crompton potentiometer
(UTTARAKHAND –I 2013)
25. Internal resistance of a micro-ammeter is 500
ohm. Resistance required to increase its range from
0-100 μA to 0-10 A will be approximately
(a) 0.05 Ω
(b) 0.005 Ω
(c) 0.5 Ω
(d) 5.0 Ω
(UPSSSCJE – 2016)
26. Range of ammeter can extend by connecting-
(a) a Shunt parallel to ammeter
(b) a Shunt in series to ammeter
(c) a Multiplier parallel to ammeter
(d) a Multiplier in series to ammeter
(DMRC 2016)
27. Clamp on ammeter is used for measurement of:
(a) Large alternating currents
(b) Small direct currents
(c) Small alternating currents
(d) Large direct currents
(DMRC 2016)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ 28. An ammeter has a current range of 0-5 A, and its
internal resistance is 0.2Ω. In order to change the
range to 0-25 A, what should be the value of
resistance added and how it would connect with
meter (i.e. series/parallel)?
(a) (0.05Ω/series)
(b) (0.05Ω/parallel)
(c) (0.20Ω/parallel)
(d) (0.20Ω/Series)
(DMRC 2016)
29. The measurement range of an ammeter can be
increased by using a:
(a) High resistance in shunt
(b) Low resistance in shunt
(c) High resistance in series
(d) Low resistance in series
(DMRC 2016)
30. A permanent magnet moving coil ammeter has a
coil resistance of 99 ohm and Full scale deflection
(FSD) current of 0.1 mA. Shunt resistance is 1 ohm.
Current through the meter at 0.5 F.S.D. is:
(a) 0.007 mA
(b) 0.05 mA
(c) 0.023 mA
(d) None of these
(SSCJE 2014, Morning Shift)
31. The multiplying power of the shunt of a
millimeter is 8. If the circuit current is 200 mA. Then
current through the meter us
(a) 25 mA
(b) 200 mA
(c) 1600 mA
(d) 3200 mA
(UPRVUNL 2014)
34. What should be the properties and mode of
connection of the shunts and multipliers used to
increase the ranges of voltmeters and ammeters?
(a) Shunts- low resistance connected in parallel
with ammeters
(b) Shunt- high resistance, connected in series with
ammeters
(c) Multipliers- low resistance, connected in series
with voltmeters
(d) Multipliers- high resistance, connected in parallel
with voltmeters
(DMRC 2016)
35. By mistake voltmeter and ammeter are connected
as shown in the figure below:
(a) Only voltmeter will burn away
(b) Only ammeter will burn away
(c) Both voltmeter and ammeter will burn away
(d) None will burn away
(SSCJE 2014, Morning Shift)
36. In electrodynamometer ammeter, the deflection
of the pointer is proportional to
(a) mean of currents in fixed coil and moving coil
(b) square of the current in moving coil
(c) RMS value of current in fixed coil
(d) Mean -square of currents in fixed coil and
moving coil
(SSCJE 2013)
37. When a multiplier is added to an existing
voltmeter for extending its range, its electromagnetic
damping
(a) remains unaffected
(b) Increase
(c) Decreases
(d) Changes by an amount depending on the
controlling torque
(SSCJE 2013)
38. A voltmeter when connected across a D.C.
supply, reads 124 V. When a series combination of
the voltmeter and an unknown resistance X is
connected across the supply, the meter reads 4 V. If
the resistance of the voltmeter is 50 kΩ, the value of
X is
(a) 1550 kΩ
(b) 1600 kΩ
(c) 1.6 kΩ
(d) 1.5kΩ
(SSCJE 2009)
39. A DC ammeter ha resistance of 0.1Ω and current
range is 0 – 100A. If the range is to be extended to 0-
500A, then meter enquires shunt resistance of:
(a) 0.010Ω
(b) 0.011Ω
(c) 0.025Ω
(d) 1.0Ω
(SSCJE 2009)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ 40. Which instrument has the lowest resistance?
(a) Ammeter
(b) Voltmeter
(c) Megger
(d) Frequency meter
(MPJE 2015)
41. A 0-300 V voltmeter has a guaranteed accuracy
of 1% on full scale reading. The voltage measured by
the instrument is 83 V. The percent limiting error is:
(a) 3.62
(b) 1.81
(c) 0.95
(d) 14.85
(UTTARAKHAND –I 2013)
44. What will happen if a voltmeter is connected like
an ammeter in series of the load?
(a) The meter will burn out.
(b) The measurement will be too high.
(c) The same current will flow as would have been
with ammeter in circuit.
(d) There will be almost no current in the circuit.
(UTTARAKHAND –I 2013)
45. The sensitivity of voltmeter using 0-5 mA meter
movement is
(a) 200 Ω/V
(b) 150 Ω/V
(c) 100 Ω/V
(d) 50 Ω/V
(UPSSSCJE –2016)
48. Internal resistance of an ideal ammeter is-
(a) Zero
(b) Infinite
(c) Small
(d) Big
(DMRC Electronic 2015)
49. A voltmeter is used.
(a) To measure current
(b) In series with the circuit
(c) In parallel with the circuit
(d) To measure coulombs
(LMRCSC/TO 2015)
50. A voltmeter gives 120 oscillations per minute,
when connected to the rotor of an induction motor.
The stator frequency is 50 Hz. The slope of the motor
is:
(a) 2%
(b) 5%
(c) 2.5%
(d) 4%
(LMRCSC/TO 2015)
51. A 10 mA ammeter has a resistance of 50 ohms. It
is to be converted to a 1 A ammeter. The value of
shunt resistance should be:
(a) 5 ohms
(b) 0.1 ohms
(c) 0.505 ohms
(d) 0.05 ohms
(UTTARAKHAND –I 2013)
52. Series resistance required to read 0-250 V with a
moving coil instrument of internal resistance 2 ohm
and full scale deflection of 50 mA is
(a) 49998 Ω
(b) 4998 Ω
(c) 498 Ω
(d) 49.8 Ω
5. (Wattmeter and Maximum Demand Indicator)
(UPRVUNL 2013)
1. According to Blondel’s theorem, if a
network is supplied using ‘n’ conductor’ the
total power is the of the reading of n
wattmeter so arranged that a current coil of
each line and the corresponding pressure
coil is connected between that line and a
common point
(a) Sum
(b) Product
(c) Sum of product of two wattmeter
reading taken together
(d) Difference
(DMRC 2014)
2. The pressure coil of a wattmeter consists of:
(a) More number of turns of fine wire
(b) Less number of turns of fine wire
(c) Less number of turns of thick wire
(d) More number of turns of thick wire
(SSCJE 2014) Evening Shift
3. The least number of 1- ɸ wattmeter required
to measure total power consumed by an
unbalanced load fed from a 3ɸ, m 4 wire
system is:
(a) 2
(b) 3
(c) 4
(d) 1
(SSCJE 2013)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
4. In a balanced 3-phases circuit, the line
current is 12 A. When the power is
measured by two wattmeter method, one
meter reads 11 kW while the other reads
zero. Power factor of the load is
(a) 0
(b) 0.5
(c) 0.866
(d) 1.0
(SSCJE 2012)
5. In a balanced 3-phases system, the current
coil of a wattmeter is inserted in line 1 and
the potential coil across 2 and 3. If the
wattmeter reads 100 W, the reactive power
drawn by the 3-phases load is
(a) 173.2 VAR
(b) 50 VAR
(c) 100 VAR
(d) 141.4 VAR
(SSCJE 2012)
6. In phantom loading arrangement, energy
consumption in the calibration test of
wattmeter is reduced because of
(a) The separate application of low voltage
supply across current coil
(b) No common point between the two
coils
(c) The reduced loss in current coil and
pressure
(d) The absence of load in the test set
(SSCJE 2007)
7. A dynamometer type wattmeter can be used
on-
(a) d.c.only
(b) a.c.only
(c) rectified a c only
(d) a.c. as well as d.c
(SSCJE 2015)
8. A dc voltmeter has a sensitivity of 100Ω/
volt when it measures half full scale in 100V
range, the current through the voltmeter will
be?
(a) 50 mA
(b) 1 mA
(c) 0.5 mA
(d) 100 mA
(SSCJE 2015)
9. If a dynamometer type wattmeter is
connected in an ac circuit, the power
indicated by the wattmeter will be:
(a) Instant Peak power
(b) Peak power
(c) Volt ampere product
(d) Average power
(JMRC 2012)
10. The resistance of a 125 W strain gauge
changes by 1 W for 400 micro strain. How
much is the gauge factor?
(a) 1.5
(b) 2
(c) 2.5
(d) 3
(UTTARAKHAND-II 2013)
11. An automatic power factor controller cannot
achieve
(a) Voltage control
(b) K VAR control
(c) kW control
(d) Pf control
(MPJE 2015)
12. In an electrodynamometer type wattmeter:
(a) The current coil is made fixed
(b) The pressure coil is fixed
(c) Both the coil are fixed
(d) Both the coil are movable
(MPJE 2015)
13. The power in a 3 phase four wire circuit can
be measured by using:
(a) 1 wattmeter
(b) 2 wattmeter
(c) 3 wattmeter
(d) 4 wattmeter
(MPJE 2015)
14. In a single phase induction type wattmeter, a
meter can be reversed by
(a) Reversing either the potential coil
terminal
(b) Reversing connections of both current
and potential coil circuits
(c) Reversing the supply terminals
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(d) Reversing the load terminals
(MPJE 2015
15. One single phase wattmeter operating on
230 V and 5A for hours makes 1940
revolutions. Meter constant in revolution is
400. The power factor of the load will be:
(a) 1
(b) 0.8
(c) 0.7
(d) 0.6
(UPSSSC 2015)
16. In an electro dynamometer type Watt meter
if the voltage and current measured are
given by V = 100 sin 314t and i = 10 sin (
314 t - 60º) respectively, the reading (in
watts) will be
(a) 1000
(b) 500
(c) 250
(d) 433
(UPSSSC 2015)
17. In the measurement of 3 phase power by two
watt meter method, for an unbalanced load,
the power factor of the load is
(a) Cos[tan
(MPJE 2016 Evening Shift)
18. Which of the following provide deflecting
force for voltmeters only?
(a) Electromagnetic effect
(b) Electrodynamics effect
(c) Magnetic effect
(d) Electrostatic effect
(MPJE 2016 Evening Shift)
19. How many coils are there in a wattmeter?
(a) 2
(b) 3
(c) 4
(d) 1
(MPJE 2016 Evening Shift)
20. A dynamometer wattmeter is rated at 10 A
and 100 V with a full scale reading of 1000
W. The inductance of the voltage circuit is
5mH and its resistance 3000 ohm. Voltage
across the current coil is negligible. At 50
Hz and zero power factors, the error in the
wattmeter at the VA reading will be-
(a) 0.325 W
(b) 0.523 VA
(c) 0.575 VA
(d) 0.604 W
(UTTARAKHAND –I 2013)
21. If a dynamometer wattmeter is connected in
an ac circuit, the power indicated by the
wattmeter will be
(a) Volt-ampere product
(b) Average power
(c) Peak power
(d) Instantaneous power
(UTTARAKHAND –I 2013)
22. A compensated wattmeter has its reading
corrected for error due to
(a) Frequency
(b) Friction
(c) Power consumed in current coil
(d) Power consumed in pressure coil
(DMRC 2016)
23. Power consumed by a balanced 3-phase, 3-
wire load is measured by two wattmeter
method. The first wattmeter reads twice that
of the second. Then what will be the load
impedance angle in radian?
(a) (π/6)
(b) (π/3)
(c) (π/2)
(d) (π/4)
(DMRC 2016)
24. For power measurement of three phase
circuit by two wattmeter method, when the
value of power factor is less than 0.5
lagging:
(a) One of the wattmeter will read zero.
(b) Both give the same readings
(c) One of the wattmeter connections
will have to be reversed
(d) Pressure coil of the wattmeter will
become ineffective
(SSCJE 2010)
25. Laboratory wattmeter’s are-
(a) Induction type
(b) Moving type
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(c) Electrostatic type
(d) Electro- dynamometer type
(UPRVUNL 2014)
29. Single or one Wattmeter method can only be
used for
(a) Balanced three-phase load
(b) Imbalanced two-phase load
(c) Balanced one-phase load
(d) Imbalanced one-phase load
(UPRVUNL 2014)
30. In a single phase Dynamometer, the
instantaneous torque has a component of
power which varies as
(a) Twice
(b) Half
(c) Four times
(d) Three times
(UPRVUNL 2014)
31. Calculate the percentage error for a
wattmeter which is so connected that the
current coil is no the load side. The
wattmeter has a current coil of 0.03Ω
resistance and a pressure coil of 6000Ω
resistance. It is also known that the load
takes 20 A at a voltage of 220 V and 0.6
power factor.
(a) 0.45%
(b) 45%
(c) 5.5%
(d) 6.5%
(DMRC 2015)
32. The power in an unbalance 3-phase 4-wire
circuit can be measured by using a
……….method.
(a) 4 wattmeter
(b) 3 wattmeter
(c) 2 wattmeter
(d) 1 wattmeter
(SSCJE 2013)
33. Pharos diagram of load voltage (V), current
in pressure coil (Ip) and current in current
coil (Ic) is shown in the figure when an
electrodynamics wattmeter is used to the
wattmeter will be proportional to:
(SSCJE 2013)
34. A wattmeter is marked 15A/30A,
300V/600V and its scale is marked up to
4500 watts. When the meter is connected for
30 A, 600V, the point indicated 2000 watts.
The actual power in the circuit is
(a) 200 watts
(b) 400 watts
(c) 6000 watts
(d) 8000 watts
(SSCJE 2013)
35. In the measurement of power in a balanced
3-phase circuit by two-wattmeter method if
the two wattmeter show equal readings.
Then the power factor of the circuit is
(a) Zero
(b) Unit
(c) O.8 lagging
(d) 0.8 leading
(SSCJE 2013)
36. Two meters X and Y required 40 mA and 50
mA respectively for full scale deflection.
Then
(a) Both are equally sensitive
(b) Data are insufficient to comment
(c) X is more sensitive than y
(d) Y is more sensitive than X
(SSCJE 2008)
37. A dynamometer type watt meter responds
to the
(a) Average value of active power
(b) Average value of reactive power
(c) Peak value of active power
(d) Peak value of reactive power
(SSCJE 2009)
38. The moving coil in a dynamometer
wattmeter is connected
(a) In series with the fixed coil
(b) Across the supply
(c) In series with the load
(d) Any one of the above
(SSCJE 2015)
39. Three wattmeter method of power
measurement can be used to measure power
in:
(a) Both balanced and unbalanced
circuits
(b) Balanced circuits
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(c) None of these
(d) Unbalanced circuits
(UTTARAKHAND-I 2013)
40. Which of the following is not a method of
resistance measurement?
(a) Ammeter- Voltmeter method
(b) Post- office box method
(c) Ohm- Meter method
(d) Two wattmeter method
(UTTARAKHAND-I 2013)
41. While measuring power in a three phase
load by two wattmeter method, the reading
of two wattmeter are equal and opposite,
when
(a) Load is balanced
(b) Power factor is unity
(c) Phase angle is between 60º to 90º
(d) The load is purely inductive
(UPSSSCJE – 2016)
42. A which angle in two wattmeter method,
one wattmeter show zero readings-
(a) ɸ=0
(b) ɸ=60
(c) ɸ=90
(d) ɸ=45
(UPSSSCJE – 2016)
43. Which power factor results equal reading of
both wattmeter in 2 wattmeter method-
(a) Unit
(b) Half
(c) Zero
(d) None of the above
(UPSSSCJE – 2016)
44. While measuring power in a 3-phase load by
2 wattmeter method the readings of two
wattmeter are equal and opposite when
(a) Pf is unity
(b) Load is balanced
(c) Phase angle is between 60º and 90º
(d) The load is pure inductive
(DMRC 2014)
45. In dynamometer wattmeter the
compensation coil
(a) Has equal number of turnoff voltage
coil and is connected in series with
current coil
(b) Has equal number of turns of
current coil and is connected in
series with voltage coil
(c) Has equal number of turns of current
coil and is connected in series with
current coil
(d) Has equal number of turns of voltage
coil and is connected in series with
voltage coil
(SSCJE 2011)
46. A wattmeter is being tested under phantom
loading condition. If the wattmeter reading
is 60 W, the actual power consumed from
the supply, is
(a) Much higher than 60 W
(b) 60 W
(c) Much less than 60 W
(d) 30W
(LMRC SC/TO 2015)
47. A dynamometer type of wattmeter responds
to:
(a) R.m.s value of active power
(b) Average value of active power
(c) Average value of reactive power
(d) R.m.s value of reactive power
(UPSSSCJE 2016)
48. While measuring power in a 3-phase load by
2 wattmeter method the reading of two
wattmeter are equal and opposite when
(a) Pf is unity
(b) Load is balanced
(c) Phase angle is between 60º and 90º
(d) The load is pure inductive
1. (Energy Meter)
(DMRC 2014)
2. The major cause for creeping in energy-
meter is:
(a) Over compensation for friction
(b) Vibrations
(c) Stray magnetic fields
(d) Excessive voltage across the potential
coil
(UPSSSC 2014)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
1. In which of the following instruments, a
disc is present?
(a) Ammeter
(b) Voltmeter
(c) Wattmeter
(d) Energy meter
(JMRC 2012)
2. The loss of charge method can be used
to measure which of the following?
(a) Resistance of shunt
(b) Resistance of shunt winding
(c) Insulation resistance of cable
(d) Resistance of transformer winding
(JMRC 2012)
3. In a single phase power meter what is
the phase difference between current in
the two pressure coils?
(a) Exactly 0º
(b) Exactly 90º
(c) Approximately 0º
(d) Approximately 90º
(UTTARAKHAND- II 2013)
4. A single [phase energy meter has a
constant of 1200 revolution/k Wh.
When a load of 200 W is connected, the
disc rotates at 4.2 revolutions per min.
If the load is on for 10 hours, the meter
records an excess of
(a) 0.1 kWh
(b) 0.2 kWh
(c) 1.0 kWh
(d) 2.0 kWh
(UPSSSC 2014)
5. The household energy meter is
(a) An indicating instrument
(b) A recording instrument
(c) An integrating instrument
(d) None of the above
(MPJE 2015)
6. The pressure coil of an energy meter
is……………..
(a) Purely resistive
(b) Purely inductive
(c) Highly resistive
(d) Highly inductive
(UPSSSC 2014)
7. The creeping is observed in
(a) Ammeter meter
(b) Wattmeter
(c) Energy meter
(d) Volt meter
(UTTARAKHAND- I 2013)
8. The meter constant of a single phase
energy meter is 500 rev/kwh the meter
takes 86 seconds to make 50 revolutions
while measuring a full load of 4.4
kilowatt. The percentage error in the
meter is
(a) -2.43%
(b) 2.43%
(c) -4.86%
(d) 4.86%
(SSCJE 2011)
12.In an induction type energy meter,
everything else remaining same, if the
radial distance of the brake magnet
poles from the spindle is decreased by
10%, the rotational speed of the disc
will……………………...approximately
.
(a) Increased by 23.5%
(b) Decrease by 10.6%
(c) Decrease by 19.4%
(d) Increase by 11%
(UTTATRAKHAND – I 2013)
13.The disc of domestic supply energy meter is made
of which material?
(a) Zinc
(b) Copper
(c) Aluminum
(d) Silver
(UPPCL 2016)
1. The energy meter used in homes is an
example of-
(a) Indicating instrument
(b) Comparison instrument
(c) Recording instrument
(d) Integrating instrument
(SSCJE 2017)
2. The household energy meter is
(a) Recording instrument
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(b) None of these
(c) Indicating instrument
(d) Integrating instrument
(UPRVUNL 2014)
17. In a single phase induction type energy meter, the
deflecting torque is the true power in the circuit.
(a) Proportional to
(b) Equal to
(c) Greater than
(d) Less than
(DMRC 2015)
18. If an induction type energy meter runs fast, it
can be slowed down by:
(a) Lag adjustment
(b) Light load adjustment
(c) Adjusting the position of braking
magnet and making it come closer to
the centre of the disc
(d) Adjusting the position of braking
magnet and making move away from
the centre of the disc.
(SSCJE 2014, Morning Shift)
19. Two holes are drilled in the disc on a
diameter of energy-meter to
(a) Increase ventilation
(b) Reduce the weight of disc
(c) Eliminate creeping on no-load
(d) Increase deflecting torque
7.(Miscellaneous Measuring Instruments)
(UPRVUNL 2015)
1. In a megger, controlling torque is
provided by:
(a) Spring
(b) Gravity
(c) Coil
(d) Eddy current
(DMRC 2015)
2. When testing an electric iron on
megger, the reading of the megger
is infinity. This indicates:
(a) Short circuit of heating
element
(b) Short circuit of supply
terminals
(c) Open circuit of heating
element
(d) Loose terminal connection
(DMRC 2015)
3. When external circuit is open, on
moving the handle, the pointer of
megger indicates:
(a) Zero
(b) Very low resistance
(c) Very high resistance
(d) Infinity
(SSSCJE 2014, Evening Shift)
4. Speed of the megger is kept at:
(a) 120 rpm
(b) 140 rpm
(c) 160 rpm
(d) 100 rpm
(SSCJE 2012)
5. Which of the following does not
employ a null method of
measurement?
(a) Megger
(b) Dc potentiometer
(c) Kelvin double bridge
(d) AC potentiometer
(SSCJE 2011)
6. Megger is an instrument by which
we can measure
(a) High resistance
(b) Low resistance
(c) High current
(d) High voltage
(SSCJE 2011)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
7. With the decrees in the strength of
the permanent magnet in an
insulation Megger due to ageing,
Megger reading will
(a) Be lowest than actual
(b) Be higher than actual
(c) Remain unaffected
(d) Fluctuate rapidly
(SSCJE 2015)
8. Which instrument is used to
measure the high resistance?
(a) Kelvin’s Double bridge
(b) Carey-Foster bridge
(c) Megger
(d) Wheat stone bridge
(JMRC 2012)
9. When a capacitor is connected to
the terminal of a ohm meter, the
pointer indicated a low resistance
initially and finally came to infinity
position. What does this slowly
about the capacitor?
(a) Short circuit
(b) All right
(c) Faculty
(d) Open
(JMRC 2012)
10. The dead zone in pyrometer is
0.125% of span. The calibration is
400ºC to 100ºC. What temperature
change might occur before it is
detected?
(a) 0.0125ºC
(b) 0.75ºC
(c) 0.4ºC
(d) 1ºC
(JMRC 2012)
11. In measuring a resistance by
voltmeter-ammeter method, the
voltmeter can be connected either
across supply or across the
resistance. If the resistance is low,
then where the voltmeter should be
connected?
(a) Across the supply
(b) Across the resistance
(c) Either in two position
(d) Preferably across the supply
(UTTARAKHAND –II 2013)
12. To measure insulating resistance of
equipments of voltage rating up to
440 V the megger generator must
generate
(a) 220 V
(b) 440 V
(c) 500 V
(d) None of these
(UTTARAKHAND –II 2013)
13. A megger is to measure insulation
resistance of a cable. The cable
should be connected to
(a) Battery
(b) DC supply
(c) AC supply
(d) No supply
(UTTARAKHAND –II 2013)
14. A megger is basically a/an
(a) Moving iron type instrument
(b) Moving coil type instrument
(c) Hot wire instrument
(d) Electrolytic instrument
15. Piezo meter is used to measure
(a) Very high pressure
(b) Very low pressure
(c) Displacement
(d) None of these
(UTTARAKHAND –II 2013)
16. Which of the following device is
used to measure flow in an open
channel?
(a) Venturimeter
(b) Rota meter
(c) Orifice
(d) Pitot tube
(MPJE 2015)
17. A megger is usually:
(a) Moving iron type instrument
(b) Electro-static type instrument
(c) Hot-wire type instrument
(d) Moving coil type instrument
(MPJE 2015)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
18. A meggar is used for measurement
of:
(a) Low valued resistance
(b) Medium valued resistance
(c) High valued resistance,
particularly insulation
resistances
(d) All of the above
(IOF 2014)
19. The limitation of the voltage
multiplying circuit is that
(a) The output has high ripple
content
(b) High output voltage is difficult
to obtain
(c) High output current is
difficult to obtain
(d) The size of the captors
becomes very large
(UPSSSC 2015)
20. In which type of frequency meter,
the frequency is found when the
torque in the moving coil becomes
zero?
(a) Vibrating reed type
(b) Permanent Magnet moving
coil type
(c) Moving iron type type
(d) Electrical resonance type
(MPJE 2016 Evening Shift)
21. Which of the following method
used for measuring high resistance?
(Given: above 100kΩ).
(a) Megger Method
(b) Ohmeter Method
(c) Potentiometer Method
(d) Wheat stone bridge Method
(UTTARAKHAND- I 2013)
28. Megger is used for measure
(a) Very high resistance or
insulation resistance
(b) Low resistance
(c) High resistance
(d) Very low resistance
(UPPCL 2016)
29. Resistance can be measured by-
(a) Ohmmeters
(b) Resistance bridge
(c) Wattmeters
(d) Ampere-hour meters
(UPPCL 2016)
30. In a meggar, the deflection of moving coil
depends on-
(a) Applied voltage
(b) Inverse of applied voltage
(c) The ration of currents in the coil
(d) The product of currents in the coils
(SSCJE 2008)
5. Megger is an instrument to measure:
(a) A very low resistance
(b) Insulation resistance
(c) Q of coil
(d) Inductance of coil
(UTTARAKHAND- II 2013)
6. The insulation resistance test in performed
on power lines with
(a) Ohm meter
(b) Earth tester
(c) Megger
(d) Any of these
(UPSSSC JE- 2016)
7. If an ohm meter reading immediately goes
practically to zero and stays there while
checking a capacitor, the capacitor is
(a) Leaky
(b) Short circuited
(c) Open circuited
(d) satisfactory
(UPVUNL 2014)
36.The insulation resistance of an
installation is measured by a
(a) Multimeter
(b) Wheat stone bridge
(c) earth tester
(d) Megger
(UPVUNL 2014)
37. Which among the following is not a method for
measurement of high resistance?
(a) Direct deflection method
(b) Megohm bridge
(c) Megger
(d) Loss of current method
(SSCJE 2011)
39. Megger is an instrument used for measurement
of:
(a) High resistance
(b) Medium resistance
(c) Low resistance
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ (d) Leakage current
(IOF 2014)
40. The pressure coil consist of
(a) More number of turns of fine wire
(b) More number of turns of thick wire
(c) Less number of turns of fine wire
(d) Less number of turns of thick wire
8. (Electronic Instruments)
(SSCJE 2014, Morning Shift)
4. In a Cathode Ray Tube, the focusing anode is
located
(a) After accelerating anode
(b) Between pre-accelerating and accelerating
anodes
(c) Before pre-accelerating anode
(d) Just after electron-gun
(SSCJE 2015) 5. Modern electronic multimeters measure resistance
by?
(a) Using an electronic bridge compensator for
nulling
(b) Using a bridge circuit
(c) Using a electrical bridge circuit
(d) Forcing a constant current and measuring the
voltage across the unknown resistance
(SSCJE 2015)
2. A CRO screen has ten divisions on the
horizontal scale. If a voltage signal 5 sin
(314t + 45º) is examined with a line base
setting of 5 msec/dic, the number of cycle of
signal displayed on the screen will be?
(a) 0.5 cycle
(b) 10 cycle
(c) 2.5 cycle
(d) 5 cycle
(UTTARAKHAND – II 2013)
3. Which meter is suitable for the measurement
of 10 m V at 50 MHz?
(a) Moving iron voltmeter
(b) CRO
(c) Electrostatic voltmeter
(d) VTVM
(UTTARAKHAND – II 2013)
4. A CRO cannot be used for direct
measurement of
(a) Voltage
(b) Current
(c) Frequency
(d) Power
(UTTARAKHAND – II 2013)
5. Horizontal deflection plates of CRO are
placed generally:
(a) Horizontal
(b) Vertical
(c) Diagonal
(d) (a) or (b)
(UTTARAKHAND – II 2013)
6. Lissajous pattern obtained on a CRO screen
is a circle. Frequency of two signals are
(a) Equal
(b) Unequal
(c) Zero
(d) Infinity
(UTTARAKHAND – II 2013)
7. In the case of PMMC rectifier type
instruments, the deflecting torque is
proportional to:
(a) Average value of AC current
(b) RMS of AC
(c) Instantaneous value
(d) Peak value
(MPJE 2015)
8. Which meter is suitable of the measurement
of 10 mV at 50 MHz?
(a) Moving iron voltmeter
(b) VTVM
(c) Moving coil voltmeter
(d) CRO
(MPJE 2015)
9. The high torque to weight ratio in an analog indicating instrument indicates: (a) High friction loss (b) Low friction loss (c) Not related to friction loss (d) None of the above
(MPJE 2016, Evening Shift)
10. What is the resolution of 4-digit digital instrument? (a) 0.002% (b) 0.005% (c) 0.1% (d) 0.01%
(UTTARAKHAND- I 2013)
17. A VTVM can be used to measure
(a) Dc voltage only
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ (b) Ac voltage only
(c) Both (a) and (b)
(d) None of the above
(IOF 2014)
18. The essential condition for the Paschen’s law to
be valid is that
(a) Voltage must be D.C
(b) Voltage must be A.C.
(c) Temperature must be constant
(d) Humidity must be low
(UPRVUNL 2015)
19. Which of the following cannot be measured by
multimeters?
(a) Frequency
(b) Current
(c) Resistance
(d) Voltage
(DMRC 2014)
20. LVDT is a:
(a) Displacement transducer
(b) Velocity transducer
(c) Acceleration transducer
(d) Pressure transducer
(SSCJE 2014, Morning Shift)
21. In a CRO, a sinusoidal waveform of a certain
frequency is displayed. The value of the
quantity that can be made out by observation
is
(a) RMS value of the sine wave
(b) Average value of the sine wave
(c) Form factor of the sine wave
(d) Peak-peak value of the sine wave
(SSCJE 2014, Morning Shift)
22. The technique of adding a precise amount of
time between the trigger point the beginning
of the scope sweep in a CRO is known as
(a) Free running sweep
(b) Delayed sweep
(c) Triggered swap
(d) Non-sawtooth sweep
4
(UTTARAKHAND- II 2013)
23. Optical pyrometer is used to measure
(a) Light intensity
(b) Low temperature
(c) High temperature
(d) Light intensity & High temperature
(MPJE 2015)
24. An LVDT is used to measure displacement.
The LVDT feeds a voltmeter of 0.5V range
through a 250 gain amplifier. For a
displacement 0.5 mm the output of LVDT is
2 mV. The sensitivity of instrument is:
(a) 0.1 V/mm
(b) 0.5 V/mm
(c) 1 V/mm
(d) 5V/mm
(UPSSSCJE – 2016)
28. Cathode of CRO is coated with-
(a) Alkali material
(b) Thorium oxide
(c) Copper oxide
(d) Barium oxide
(UPSSSCJE – 2016)
29. A CRO can be used to measure-
(a) a.c. voltage
(b) d.c. voltage
(c) Frequency
(d) All of the above
(SSCJE 2014, Evening Shift)
30. In a 3 ½ digit voltmeter, the largest number that
can be read is:
(a) 1999
(b) 5999
(c) 9999
(d) 0999
(UTTARAKHAND –I 2013)
31. A digital voltmeter has a read-out range from 0 to
9999 counts. When full scale reading is 9.999 V, the
resolution of the instrument will be
(a) 100 mV
(b) 99 mV
(c) 9 mV
(d) 1 mV
(UTTARAKHAND –II 2013)
32. Match of the Lists L-I and L-II.
List-I
List-II
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™ 1. Bolometer
A. Flow
2. H- Bridge
B. Dispalcement
3. LVDT
C. Radiation
4. Anemometer
D. DC Motor
1 2 3 4
(a) C D B A
(b) D C A B
(c) A C B D
(d) D C B A
(DMRC Electronic 2016)
33.In a CRO which of the following is not a part of
election gun.
(a) Cathode
(b) Grid
(c) accelerating anode
(d) X-Y plates
(IOF Electronic 2014)
34.An oscilloscope is basically designed to convert
(a) Visual signals to electrical signals
(b) Sound signals to electrical signals
(c) Electrical signets to visual signals
(d) Sound signals to visual signal
9. (Measurement of Resistance, Inductance and
capacitance)
(UPRVUNL 2014)
1. In order to measure the dielectric losses of a
capacitor, which one of the following AC
bridges is used?
(a) Anderson Bridge
(b) Hay’s bridge
(c) Schering bridge
(d) Wien’s bridge
(UPRVUNL 2014)
2. Which expression depicts the sensitivity (S)
of a Wheatstone Bridge?
(a) S = D/I
(b) S = DI
(c) S = D + I
(d) S = D – 1
(DMRC 2014)
3. Schering bridge is used to measure:
(a) Dielectric loss
(b) The inductance
(c) Low resistance
(d) Mutual inductance
(JMRC 2012)
4. To measure the resistance of about 8 Ω
which instrument should be used?
(a) Kelvin’s double bridge
(b) Wheatston’s bridge
(c) Meggar
(d) Wattmeter
(IOF 2014)
5. Low resistance is measured by
(a) De sauty’s bridge
(b) Maxwell’s bridge
(c) Kelvin’s bridge
(d) Wien bridge
(DMRC Electronic 2014)
6. Schering bridge is used to measure
(a) Frequency
(b) Inductance
(c) Capacitance
(d) Mutual inductance
(MPJE 2016 Morning Shift)
7. Which method requires a standard capacitor
in terms of which the self-
(a) Anderson Bridge
(b) Hays Bridge
(c) Heaviside-Campbell Bridge
(d) Owens Bridge
(MPJE 2016, Evening Shift)
8. Which method is especially suitable for the
measurement of small inductance?
(a) Kuriyama method
(b) Butterworths method
(c) Felicia method
(d) Campbell’s method
(MPJE 2016, Evening Shift)
9. In which type of instrument the moving coil
consists of a single loop of fine bronze or
platinum silver wire?
(a) Schering and Schmidt galvanometer
(b) Darsonval galvanometer
(c) Campbell galvanometer
(d) Duddell moving coil galvanometer
(MPJE 2016, Evening Shift)
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
10. ………………..circuit is used to make
precise measurement of a resistors value
using resistors, voltage source and a
galvanometer
(a) Wheatstone bridge
(b) Wien bridge
(c) Carey Foster bridge
(d) Kelvin bridge
(UTTARAKHAND-I 2013)
13.Hay bridge is suitable for measuring following
type of inductance
(a) having Q greater than 10
(b) having Q less than 10
(c) having any value of Q
(d) having phase angle of reactance very large.
(UTTARAKHAND-I 2013)
14.The dielectric loss of a capacitance can be
measured by
(a) Hay bridge
(b) Maxwell bridge
(c) Anderson bridge
(d) Schering bridge
(UTTARAKHAND-I 2013)
11. For measurement of low resistance, the
bridge used is
(a) Wheatstone
(b) Kelvin
(c) Maxwell
(d) Anderson
(UTTARAKHAND-I 2013)
12. The Maxwell bridge is used for measuring
(a) Capacitance
(b) Dielectric loss
(c) Inductance
(d) Phase angle
(UPPCL 2016)
13. The unknown inductance is measured in
terms of……………………..in the case of
Anderson bridge.
(a) Known resistance and capacitance
(b) Known inductance
(c) Known resistance
(d) Known capacitance and inductance
(DMRC 2016)
14. In a galvanometer, the deflection becomes
one half when the galvanometer is shunted
by a 20 ohm resistor. The galvanometer
resistance is:
(a) 50 ohm
(b) 10 ohm
(c) 40 ohm
(d) 20 ohm
(SSCJE 2014, Morning Shift)
19. The AC bridge used for measurement of
dielectric loss of capacitor is
(a) Anderson bridge
(b) Schering bridge
(c) Wien bridge
(d) Hay’s bridge
(DMRC 2014)
20. A Q-meter measure:
(a) Loss in a capacitor
(b) Schering bridge
(c) Wien bridge
(d) Hay’s bridge
(SSCJE 2014, Evening Shift)
21. Which one of the following bridge is
generally used for measurement of
frequency and also capacitance?
(a) Owen’s bridge
(b) Schering bridge
(c) Wien bridge
(d) Hay’s bridge
(SSCJE 2014, Evening Shift)
22. A wheat stone bridge has ratio arm of 1000Ω and
100Ω resistances, the standard resistance arm consist
of 4 decades resistance boxes of 1000, 100, 10, 1Ω
steps. The maximum and minimum values of
unknown resistance that can be determined with this
setup are:
(a) 11110 Ω
(b) 10000 Ω, 10 Ω
(c) 111100 Ω, 10 Ω
(d) 111100 Ω,1 Ω
(SSCJE 2017)
22. Which of the following a.c. bridges is
preferred fot the measurement of
inductance having high Q-factor?
(a) Hay bridge
(b) Maxwell bridge
(c) Desauty bridge
(d) Wien bridge
MEASUREMENT IMPORTANT QUESTIONS
FUTURE SECURE INSTITUTE™
(UPSSSC 2014)
23. Relative permittivity can be measured
by…………………Bridge
(a) Wheat stone
(b) Hays
(c) Schering
(d) Density’s
(SSCJE 2015)
24. In the Maxwell as shown in the figure
below the value of resistance Rx and
inductance Lx of a xoil are to be
calculated after balancing the bridge. The
component values are shown in the fig at
balance. The values of Rx and Lx will
respectively be:
(a) 75 ohm, 150 mH
(b) 75 ohm, 75 mH
(c) 37.5 ohm, 75 mH
(d) 375 ohm, 75 mH
(UPSSSCJE- 2016)
25. Maxwell bridge is used to measure
(a) Inductance
(b) Capacitance
(c) Frequency
(d) None of the above
(UPSSSCJE- 2016)
26. The bridge used for the measurement of
the value of the capacitance is
(a) Wien’ bridge
(b) Wheatstone bridge
(c) Schering bridge
(d) Hay’s bridge
10. (Elements of process
Instrumentation)
(UTTARAKHAND-II 2013)
1. An inverse transducer converts (a) Electrical energy to any other form of
energy (b) Electrical energy to light energy (c) Mechanical displacement into
electrical signal (d) Electrical energy to mechanical form
(UTTARAKHAND-I 2013)
2. A strain gauge is a passive transducer and is employed for converting (a) Pressure into change in resistance (b) Force into displacement (c) Mechanical displacement into a
change of resistance (d) None of the above
(UPSSSC 2014)
3. Synchro is (a) Parabolic transducer (b) An angular position transducer (c) A synchronizing transducer (d) A variable transducer
(MPJE 2015)
4. The thermocouple instruments do not have:
(a) High sensitivity
(b) Absence of frequency error
(c) Independence of ambient temperature
(d) High degree of measuring accuracy
(SSCJE 2014, Evening Shift)
5. What is the order of minimum displacement
that can be measured with capacitive
transducers?
(a) 1 mm
(b) 1 μm
(c) 1 X 10ˉˡ²
(d) 1 cm
(UTTARAKHAND-II 2013)
6. The dynamic characteristics of capacitive
transducer are similar to those of
(a) Low-pass filter
(b) High-pass filter
(c) Notch filter
(d) Band-stop filter