u.s.c.g. merchant marine exam qmed q808 pumpman …q808 pumpman u.s.c.g. merchant marine exam qmed...

National Maritime Center Serving Our Nation’s Mariners

U.S.C.G. Merchant Marine Exam

QMED

Q808 Pumpman

(Sample Examination)

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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10

Choose the best answer to the following Multiple Choice Questions.

1. In a compartment that has been completely flooded with water, the greatest pressure will be exerted __________.

o (A) at the vertical center of the bulkhead • (B) along the bottom of any bulkhead o (C) along the top of the bulkhead o (D) at a point that is one-third from the bottom of the bulkhead

If choice B is selected set score to 1.

2. The lengthening of a crack formed in the shell plating of a ship may be prevented by __________.

• (A) drilling a hole at each end of the crack o (B) cutting a square notch at each end of the crack o (C) welding brackets across both ends of the crack o (D) chipping out and slot welding the entire crack

If choice A is selected set score to 1.

3. After taking on fuel oil, the hoses should be disconnected and __________.

• (A) drained into buckets or fuel tanks o (B) drained into the bilges and washed out o (C) draped over the fantail to dry out o (D) drained over the side and washed out


4. An ullage reading is the distance from a given point at the __________.

o (A) top of the tank down to the bottom of the tank o (B) sounding tube to either side of the tank • (C) top of the sounding tube down to the surface of the liquid o (D) top of the liquid down to the tank bottom

If choice C is selected set score to 1.

5. Small oil spills on deck can be prevented from contaminating any waters by __________.

o (A) placing floating booms around the ship o (B) thoroughly draining all bunkering hoses o (C) regularly emptying all drip pans • (D) plugging all scuppers and drains

If choice D is selected set score to 1.

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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10 6. The fire extinguishing equipment shown in the illustration is a large __________. Illustration SF-0009

o (A) light water hose reel system • (B) dry chemical hose reel system o (C) Halon 1301 hose reel system o (D) CO2 hose reel system


7. When fighting a fire with a portable dry chemical extinguisher you should always __________.

o (A) attack the fire from the leeward side • (B) direct the stream of chemical toward the base of the fire o (C) bounce the chemical onto the fire from adjacent structural members o (D) spray the chemical across the tops of the flames


8. A low velocity fog applicator is held in an all-purpose nozzle by a bayonet joint. The applicator is prevented from rotating in the joint by __________.

o (A) a keeper screw o (B) water pressure o (C) a locknut • (D) a spring-loaded catch


9. The principle personnel hazard unique to Halon fire extinguishers is __________.

• (A) inhaling toxic vapors produced when exposed directly to a flame for extended periods o (B) displacement of oxygen o (C) skin irritation o (D) eye irritation produced immediately after discharge from cylinder


10. In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by ____________.

• (A) convection o (B) conduction o (C) ventilation o (D) radiation


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11. Where will you find the procedures for the reporting of oil discharge into the water?

• (A) The vessel's Oil Transfer Procedures o (B) The vessel's Certificate of Inspection o (C) The vessel's International Oil Pollution Prevention Certificate o (D) The vessel's Oil Record Book


12. Which of the following statements is true concerning the overboard discharge of vessel sewage at sea?

o (A) The vessel may discharge disinfected and comminuted sewage into the sea, from an approved system, only if the vessel is more than 3 nautical miles from the nearest land.

o (B) The vessel must have an approved sewage plant. o (C) The vessel may discharge sewage into the sea, from an approved system which is not

comminuted or disinfected, only if the vessel is more than 12 nautical miles from the nearest land. • (D) All of the above.


13. To prevent oil from escaping into the sea when ballasting through the cargo piping system, you should FIRST __________.

o (A) open block valves, then start the cargo pump o (B) open sluice valves, then start the cargo pump • (C) start the cargo pump, then open sea suction valves o (D) open sea suction valves, then start the cargo pump


14. Which of the gases listed is the poisonous gas most likely to be found in a closed compartment involved in a fire?

o (A) Hydrogen o (B) Nitrogen o (C) Carbon dioxide • (D) Carbon monoxide


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15. A tank has been sealed and unventilated for a long period of time. Which of the following statements is true?

o (A) The tank is safe to enter. o (B) Carbon monoxide is present. • (C) The tank is especially dangerous to enter. o (D) Water vapor present when the tank was sealed has oxidized.


16. A tank or compartment is "gas free" when there is an absence of dangerous concentrations of __________.

o (A) all flammable liquids • (B) flammable or toxic gases o (C) any combustible liquid o (D) residues from cargo oil


17. At a minimum threshold, how many milliamps of current through the body produces a painful sensation that most people would perceive as an electric shock?

• (A) 3 to 7 mA o (B) 10 to 16 mA o (C) 30 mA o (D) 100 mA for 2.5 sec.


18. The simplest method to use for determining if a centrifugal pump is operating as designed, is to __________.

o (A) closely observe the pump discharge temperature • (B) close off the discharge valve, and watch for a rise in pressure o (C) use a clamp-on ammeter and compare the readings to past records o (D) momentarily close off the suction valve, and watch for a rise in pressure


19. What is used to keep water leaking from a pump packing gland away from the bearing housing?

• (A) water flinger rings o (B) shaft sleeves o (C) stuffing box gland o (D) lantern rings


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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10 20. Which of the following statements is true concerning centrifugal pumps?

• (A) The flow of liquid is developed by imparting energy due to the rotation of an impeller. o (B) They are started with the discharge valve opened. o (C) They are particularly suited for pumping high viscosity fluids. o (D) They are always mounted in a horizontal position.


21. A centrifugal pump gradually develops insufficient discharge pressure. What corrective action is required?

o (A) Throttle in on the discharge valve. o (B) Throttle in on the suction valve. o (C) Replace the lantern rings. • (D) Replace the wearing rings.


22. When renewing spiral packing in a centrifugal pump stuffing box, after the packing is firmly seated, the packing gland nuts should be __________.

• (A) loosened, and then retightened with the pump running under normal conditions o (B) tightened an additional 10% to compress the packing o (C) left in that position o (D) loosened until the gland clears the stuffing box


23. A pump shaft that is bent or distorted should normally be __________.

o (A) repaired by a suitable welding process o (B) reconditioned by metalizing and machining o (C) straightened by applying heat and torsion • (D) replaced with a satisfactory spare


24. A centrifugal pump may fail to deliver water when first started if the __________.

o (A) impeller is flooded • (B) pump is not primed o (C) water seal pipe is plugged o (D) seal ring is improperly located


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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10 25. Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the

following operational problems?

o (A) The pump packing gland overheats after short operating periods. o (B) Pounding noises can be heard at the pump suction chest. • (C) The pump delivers full capacity when started, but gradually slackens off to an abnormally low

flow. o (D) The motor overcurrent protective device continually shuts the pump down.


26. Which of the following statements is true regarding mechanical seals?

o (A) They are not suitable for use on fuel oil transfer pumps. • (B) They are normally lubricated and cooled by the fluid being pumped. o (C) Once placed into service, leakage between the dynamic seal surfaces may be reduced by

monthly adjustment of the spring compression. o (D) They may be used in lieu of conventional packing glands for any service other than salt water.


27. One disadvantage of using a mechanical shaft seal instead of mechanical packing is that __________.

o (A) it is unsuitable for high-pressure applications o (B) it requires periodic disassembly and adjustment o (C) it is unsuitable for high temperature applications • (D) seal failure usually requires the immediate removal of the pump from service


28. Which of the devices listed is used to maintain a snug interface between the rotating and stationary seal members shown in the illustration? Illustration GS-0071

o (A) seal retaining ring o (B) bellows • (C) spring o (D) notch and keyway


29. The output volume of a positive fixed displacement pump can be changed only by __________.

o (A) changing the angle of the tilting plate • (B) changing the speed of the pump o (C) moving the shaft trunnion block o (D) moving the slide block and rotor


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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10 30. A spur gear pump should be operated with the discharge valves __________.

o (A) slightly opened o (B) throttled o (C) halfway opened • (D) fully opened


31. The suction-force principle of operation is a typical characteristic of __________.

• (A) reciprocating pumps o (B) jet pumps o (C) propeller pumps o (D) centrifugal pumps


32. When securing a steam reciprocating pump, which of the valves listed should remain open?

• (A) Steam cylinder drain valve o (B) Steam exhaust valve o (C) Steam supply valve o (D) Water cylinder drain valve


33. The first step when resetting the slide valves on a duplex reciprocating pump is to __________.

o (A) measure the present port openings to ensure reassembly will be the same • (B) place the steam pistons in the mid-stroke position o (C) ensure the balance piston is on the downstroke o (D) position the steam pistons on 3/4 stroke


34. Which of the listed types of steam end piston rod packing should be used in a steam reciprocating pump?

• (A) High-pressure graphite packing o (B) Low-pressure braided asbestos packing o (C) Wire impregnated high temperature packing o (D) Reinforced rubber packing


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35. When piston rod packing persists in leaking on a reciprocating steam pump, the cause may be __________.

o (A) a loose tappet collar • (B) misalignment of the crosshead guide o (C) clogged suction strainers o (D) an open snifter valve


36. Which of the following conditions would prevent a steam reciprocating pump from delivering its rated capacity?

• (A) Excessive suction lift o (B) Air trapped in the discharge expansion chamber o (C) A leaking snifter valve allowing air to enter the suction side of the pump o (D) All of the above


37. What statement is true concerning the effect of elevating the temperature of the oily-water mixture associated with an oily-water separator?

o (A) Heating the oily-water mixture increases the viscosity of the oil and increases the specific gravity differential between the oil and water.

• (B) Heating the oily-water mixture decreases the viscosity of the oil and increases the specific gravity differential between the oil and water.

o (C) Heating the oily-water mixture decreases the viscosity of the oil and decreases the specific gravity differential between the oil and water.

o (D) Heating the oily-water mixture increases the viscosity of the oil and decreases the specific gravity differential between the oil and water.


38. In order to take suction on the lube oil drain tank cofferdam with the bilge pump shown in the illustration, how many suction side valves must be open? Illustration GS-0042

o (A) One • (B) Two o (C) Three o (D) Four


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39. The emergency bilge suction valve is typically used __________.

o (A) to inject cleaning additives when the bilges are extremely dirty o (B) when the main condenser becomes fouled, in order to provide additional cooling water

circulation o (C) to connect the rose box to the independent bilge suction • (D) if the bilges become flooded and they cannot be emptied by any other means


40. Which characteristic or condition will have the greatest effect on increasing a hydraulic oil's viscosity?

o (A) Cloud point o (B) Vacuum • (C) Pressure o (D) Pour point


41. In the system illustrated, which of the following readings should be indicated on the pressure gage, if the load (x) is 8000 lbs. (3632 kg) and the piston area (y) is 10 sq. in (64.5 sq. cm)? Illustration GS-0062

o (A) 80 psi (5.63 kg/cm2) • (B) 800 psi (56.31 kg/cm2) o (C) 8,000 psi (563.1 kg/cm2) o (D) 80,000 psi (5631 kg/cm2)


42. An arrow superimposed on a hydraulic graphic symbol at approximately 45°, as shown in the illustrated figures A, B, and C, indicates the component __________. Illustration GS-0068

o (A) is pressure compensated o (B) allows flow in one direction only o (C) is pilot controlled • (D) can be adjusted or varied


43. The portion of a hydraulic hose that determines its overall strength, is the __________.

o (A) inner tube o (B) outer armor • (C) braided inner layer(s) o (D) outer cover


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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10 44. The designation 'schedule 80 extra strong' refers to __________.

o (A) tensile strength of bolts • (B) piping wall thickness o (C) weight of steel plate o (D) tubing bursting strength


45. Small leaks in gaskets of a flanged pipe joint should be stopped immediately after installation for what reason?

o (A) The leak will cause the pipeline to progressively creep over time. • (B) The leak may cause progressive damage to the flange mating surfaces over time. o (C) The leak need not be repaired as it will eventually seal itself without further attention. o (D) The leak will result in progressively severe flange distortion over time.


46. Which pipe listed has the largest outside diameter?

o (A) A 3/4" pipe with a standard wall thickness. o (B) A 3/4" pipe with an extra strong wall thickness. o (C) A 3/4" pipe with a double extra strong wall thickness. • (D) All have the same outside diameter.


47. Tubing is sized by __________.

• (A) nominal outside diameter o (B) allowed working pressure o (C) cross-section area o (D) nominal inside diameter


48. Which of the following statements is true concerning the valve shown in the illustration? Illustration GS-0047

• (A) The valve is a non-rising stem design. o (B) The valve seats cannot be replaced or repaired. o (C) The valve is normally used to throttle the flow of liquid. o (D) The valve only requires one turn of the handwheel to fully open.


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49. The use of a needle valve in a piping system is recommended when requiring __________.

o (A) high-pressure drops o (B) no back flow o (C) no pressure drops • (D) close regulation of flow


50. The tool used for cutting external pipe threads is called a pipe __________.

o (A) cutter o (B) ratchet cutter o (C) threader • (D) stock and die


51. A thread die will be easier to start if the end of the shaft to be threaded is slightly __________.

o (A) center drilled • (B) chamfered o (C) peened o (D) reamed


52. Copper coil tubing is best cut with a __________.

o (A) pipe cutter o (B) flare cutter o (C) hand hacksaw • (D) tubing cutter


53. The tool used to prepare copper tubing for the installation of fittings is called a __________.

o (A) stretcher o (B) spreader • (C) flaring tool o (D) swaging tool


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54. The illustrated valve, figure "A", needs to be repaired due to a leak across the valve disk. To disassemble the valve you should __________. Illustration GS-0140

o (A) turn the handwheel clockwise as viewed from the top, using a pipe wrench for assistance o (B) tighten part 4 • (C) first fully loosen part 8, then turn the handwheel clockwise to separate the bonnet from the

body o (D) first fully loosen part 8, then turn the handwheel counter-clockwise to separate the bonnet

from the body


55. "Prussian Blue" is commonly used __________.

o (A) for cooling water treatment o (B) for boiler water treatment o (C) as a lube oil additive • (D) when inspecting valve seat contact


56. Which type of pump would normally be used to transfer fairly large quantities of fluids at relatively low pressures?

o (A) screw type o (B) gear type • (C) propeller type o (D) reciprocating type


57. The three basic parts of any eductor are the nozzle, the suction chamber, and the __________.

o (A) injector • (B) diffuser o (C) compressor o (D) siphon


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58. The function of item "7" shown in the illustration is to __________. Illustration GS-0153

o (A) support the tank access panel o (B) allow the oil accumulated to exit the device, while remaining separated from the liquid o (C) direct the flow of the oily-water mixture against the coalescer bed • (D) prevent separated oil from mixing with the incoming bilge water


59. Which of the valves listed for the device shown in the illustration will be open while the unit is operating in the backflush mode? Illustration GS-0153

o (A) valve "4" o (B) valves "4" and "5" • (C) valves "4" and "14" o (D) valves "4", "5", and "14"


60. If both the shell-and-tube lube oil cooler and shell-and-tube jacket water cooler of a diesel engine are sea water-cooled, what statement is true?

o (A) Sea water flows through the tubes of the jacket water cooler and through the shell of the lube oil cooler.

o (B) Sea water flows through the tubes of the lube oil cooler and through the shell of the jacket water cooler.

• (C) Sea water flows through the tubes of both the lube oil and jacket water coolers. o (D) Sea water flows through the shells of both the lube oil and jacket water coolers.


61. If a heat exchanger is designed to evaporate sea water using diesel engine jacket water as an evaporating medium, what statement is true?

o (A) The sea water gains sensible heat, and the diesel engine jacket water loses latent heat. o (B) The sea water gains latent heat, and the diesel engine jacket water loses latent heat. • (C) The sea water gains latent heat, and the diesel engine jacket water loses sensible heat. o (D) The sea water loses latent heat, and the diesel engine jacket water gains sensible heat.


62. Which of the listed devices would be installed at a control system air pressure reducing station?

o (A) Vacuum breaker o (B) Lubricator o (C) Non-return valve • (D) Moisture separator


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Q808 Pumpman U.S.C.G. Merchant Marine Exam QMED Illustrations: 10 63. One function of the air receiver in a compressed air system is to __________.

• (A) minimize the system's line pulsations o (B) remove all traces of oil from the air o (C) dry the air discharged from the intercooler o (D) receive exhaust air from pneumatic accessories


64. One of the functions of the component labeled "E", shown in the illustration, is to __________. Illustration GS-0119

• (A) act as a lube oil sump o (B) act as a cyclonic oil separator o (C) provide storage for compressed cryogenic gases o (D) act solely as a heat exchanger


65. What is the primary purpose of a reach rod as used as a valve remote operator?

o (A) It decreases the turning effort required to operate the valve. o (B) It reverses the direction of rotation normally required to operate the valve. • (C) It allows for the operation of valves that would otherwise be out of reach. o (D) It changes the type of motion normally required to operate the valve.


66. What type of valve would be fitted with a quarter-turn power actuator, such as a rack-and-pinion?

o (A) Non-rising stem gate valve o (B) Rising stem gate valve o (C) Globe valve • (D) Butterfly valve


67. Fuel oil is regularly transferred to the day tank in order to __________.

o (A) allow impurities to settle out of the fuel o (B) allow for decanting of water o (C) make fuel available for immediate use • (D) all of the above


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68. Which of the tanks, shown in the illustration, supplies fuel to the emergency generator? IllustrationMO-0058

• (A) Light fuel oil service tanko (B) Light fuel oil settling tanko (C) Light fuel oil boiler tanko (D) Light fuel oil booster tank


69. Which of the following statements is correct concerning heat transfer?

o (A) Heat is given off from a high temperature region known as a heat sink.o (B) Heat transfer rate is affected most by the size of the heat sink involved.• (C) Heat transfer rate is affected most by the temperature difference between the heat source

and the heat sink.o (D) Heat transfer by radiation will occur only by mass motion of a fluid substance.


70. The load is always placed on the lower half of the main bearings in a __________.

• (A) two-stroke cycle engineo (B) four-stroke cycle engineo (C) reverse cycle engineo (D) double acting engine


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National Maritime Center Serving Our Nation's Mariners

9/24/2018

GS-0042

Adapted for testing purposes only from SEWARD, Marine Engineering

Copyright © 1968 by The Society of Naval Architects and Marine Engineers

Further reproduction prohibited without permission of 26 Q808 Pumpman


9/24/2018

GS-0047

Adapted for testing purposes only from Machinist Mate 3 & 2

NAVEDTRA 14151



9/26/2018

GS-0119

Adapted for testing purposes only Sullair® Compressor Series 16 60 & 75 Standard & 24KT Industrial Rotary Screw Air Compressors, Operators Manual and Parts List

Copyright © by Sullair Corporation



9/27/2018

GS-0153

Adapted for testing purposes only from Operator, Unit and Direct Support Maintenance Manual

Including Repair Parts and Special Tools List for Oil Water Separator

TM 55-1925-285-13 & P

Further reproduction prohibited without permission of 26

Q808 Pumpman

National Maritime Center

Serving Our Nation’s Mariners

10/19/2018

Adapted for testing purposes only from HARRINGTON, Marine Engineering

Copyright © 1992 by The Society of Naval Architects and Marine Engineers Further reproduction prohibited without permission

MO-0058

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10/3/2018

SF-0009

Adapted for testing purposes only from Marine Fire Prevention, Firefighting and Fire Safety

U.S. Department of Transportation Maritime Administration

Further reproduction prohibited without permission of 26

Q808 Pumpman

u.s.c.g. merchant marine exam qmed q808 pumpman …q808 pumpman u.s.c.g. merchant marine exam qmed...

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