rrb mock test with answers

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previous year rrb questions solved

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1. When we open an internet site, we see www ? What is full form of wwwA. World Wide WebB. World Wide WordC. Words Wise WebD. None of theseAnswer: A. World Wide Web

2. The length of two trains are 140 m and 160 m respectively. If they run ar the speed of 60km/h and 40km/h respectively in opposite directions on parallel tracks, the find the time in which they will cross each other.A. 10 secB. 10.8 secC. 9 secD. 9.6 secAnswer: B. 10.8 sec

3. Transformer cores are laminated in order to :A. Minimise eddy current lossB. Reduce costC. Simplify its ConstructionsD. None of theseAnswer: A

4. Strain Gauge is used to convert:A. Force into displacementB. Mechanical displacement into change in resistanceC. Electric current into Mechanical displacementD. Sound Energy into Electric EnergyAnswer: B

5. If an object lies in third quadrant, its position with respect to reference planes will be:A. Infront of C.P., Above H.PB. Behind V.p., Above H.PC. Indfront of V.P., Below H.PD. Behind V.P., Below H.PAnswer: D

6. The speed of sound in air is approximately equal to:A. 3 X 108 m/secB. 330 m/secC. 5000 m/secD. 1500 m/secAnswer: B

7. When Ram and Mohn work together, they complete a work in 4days. If Ram alone can complete this work in 12days then in how many days Mohn alone can complete this work?A. 10 daysB. 8 daysC. 6 daysD. 16 daysAnswer: C

8. What of the following is a prime number ?A. 33B. 87C. 93D. 97Answer: D

9. Find the missing term of the following series :1, 4, 27, 16, ___?__, 36, 343A. 25B. 216C. 64D. 125Answer: D

10. Which country won the FIFA world cup, 2014 in Football?A. GeramanyB. ArgentinaC. BrazilD. FranceAnswer: A

11. The slenderness ratio of a compression member is :A. Effective length/Least raidus of gyrationB. Actual length/Moment of inertiaC. Moment of inertia/Actual lengthD. Actual length/Radius of gyrationAnswer: A

12. Who is the speaker of present Lok Sabha? (As on 01.11.2014)A. Smt. Sumitra MahajanB. Smt. Susma SwarajC. Smt. Meira kumarD. None of theseAnswer: A

13 The value of binary 1111 is :A. 22B. 23-1C. 22D. 24-1Answer: D

14. Who is the winner of Mens Singles Title in Tennis in US open, 2014?A. Roger FedererB. Kei NishikoriC. Marin CilicD. Rafael NadalAnswer: C

15. In which of the following movement did Gandhiji make the firest use of Hunger Strike as a weapon ?A. Ahmedabad strike 1918B. Rowlatt Satyagraha, 1919C. Swadeshi Movement, 1905D. Champaran Satyagraha, 1917Answer: A

16. Who wrote the book Not Just An Accountant published recently?A. P.C. ParakhB. Sanjay BaruC. Vinod RaiD. Natwar SinghAnswer: C

17. The length of a bar is L metres. It extends by 2mm when a tensile force F is applied. Find the strain produced in the bar:A. 0.002/LB. 2/LC. 0.2/LD. L/0.002Answer: A

18. A four stroke petrol engine theoretically operates on :A. Joule cycleB. Otto cycleC. Brayton cycleD. Bell coleman cycleAnswer: B

19. Find the value of (2744)1/3 :A. 24B. 14C. 34D. 16Answer: B

20. A man buys an article for Rs. 490 and sells it for Rs. 465.50. Find his loss percentage.A. 4%B. 4.5%C. 5%D. 5.5%Answer: C

21. If the cost of x metres of wire is d rupess, then what is the cost of y metres of same wire?A. yd/xB. xd/yC. xy/dD. d/xyAnswer: A

22. One side of a rectangular field is 15 metres. The length of diagonal of this rectangular field is 17 metres. Find the area of this rectangular field.A. 120 m2B. 60 m2C. 255 m 2D. 144 1/4 m2Answer: A

23. When a body is wholly or partially, immersed in a fluid it experience an upthrust equal to the weight of the fluid displaced. This is known as :A. Pascals principleB. Archimedes principleC. Stokes lawD. Newtons Laws of MotionAnswer: B

24. Secreation of Insulin Hormone is byA. TyroidB. PituitaryC. AdrenalD. PancreasAnswer: D

25. Earthworm belongs to which of the following Animal Phyla?A. ArthropodaB. MolluscaC. AnnelidaD. ProtozoaAnswer: C

26. If to, tp and tm are the optimistic, pessimistic and most likely time estimates of an activity respectively, then the expected time t of the activity will be :A. (to + tp + tm)/3B. (to + tp + 3tm)/5C. (to + tp + 2tm)/4D. (to + tp + 4tm)/6Answer: D

27. Find the value of [(768)3 + (232)3] / [(768)2 (768 X 232) + (232)2] :A. 1000B. 536C. 500D. 268Answer:A

28. For perfectly elestic bodies, the value of coefficient of restitution is :A. zeroB. 0.5C. 1.0D. 0.25Answer: C

29. If 1st January, 2014 was Wednesday, then 29th December, 2014 will be :A. ThursdayB. MondayC. SaturdayD. FridayAnswer: B

30. The thermal diffusivity of a substance is given by :A. Kp/CB. K/pCC. KC/pD. pC/K[Where K = Termal conductivity; p= Mass density; C= Specific heat]Answer:B

31. Which of the following is biodegradable pollutant ?A. DDTB. BHCC. Cotton clothD. MercuryAnswer: C

32. Sachin is younger than Rahul by 4 years. If their ages are in the ratio of 7 : 9, then how old is Sachin ?A. 14 YearsB. 21 YearsC. 18 YearsD. 25 YearsAnswer: A

33. Find the value of (1+2+3+4+- -+45) :A. 2140B. 2070C. 1035D. 1280Answer: C

34. When an object is cut by a section plane, parallel to H.P. and perendicular to V.P., then the sectional view of the object is obtained in :A. Top viewB. Front viewC. Left side viewD. Right side viewAnswer: A

35. The pressure exerted on the walls of container by a gas is due to the fact that Gas moiecules:A. Srick to the walls of the containerB. Lose their kinetic energyC. Get accelerated towards the wallD. Change their momentum due to collision with the wall.Answer: D

36. Which ?National Park is known for the Asiativ Lions/ ?A. Corbett National ParkB. Kanha National ParkC. Bandipur National ParkD. Gir National ParkAnswer: D

37. Separation of warer or sand or cement from a freshly mixed concrete is known as:A. SegregationB. CreepingC. BleedingD. FloodingAnswer:C

38. The relationship between Bulk density (y), Dry density (yd) and water content (w) for soil is :A. y = yd(1 + w)B. yd = y(1 + w)C. y = yd/1 + wD. y = yd/(1-w)Answer: A

39. Which one of the follwing instruments will be used for measuring electric current?A. VoltmeterB. AmmeterC. OhmmeterD. WavemeterAnswer: B

40. In a certain code language, HAND is written as SZMW, then what will be the code of MILKA. ORNPB. PNROC. NROPD. RNOPAnswer: C

41. Find the simple interest on Rs. 4800 at the rate fo 81/2% per annum for a period of 2 years 3 monthsA. Rs. 796B. Rs. 816C. Rs. 918D. Rs. 990Answer: C

42. Chosse the option which correctly shows the relationship between Modulus of Elasticity (E) ; Modulus of Righdity (C) and Bulk Modulus (K):A. E = (KC)/(K + C)B. E = (2KC)/(2K + C)C. E = (9KC)/(3K + C)D. E = (3KC)/(K + 2C)Answer: C

43. The term Operating System means :A. A set of programmes which controls computer workingB. The way a computer operator worksC. Conversion of high level language into machine level languageD. None of theseAnswer: A

44. Which of the following is not a cold working process ?A. ExtrusionB. SlittingC. BlankingD. LancingAnswer: A

45. The famous chinese pilgrim Hieun Tsang visited India during the reign of :A. HarshavardhanB. Chandragupta IIC. AshokaD, KanishkaAnswer: A

46. The language which a computer can understand is ;A. High Level LanguageB. Machine LanguageC. Assembly LanguageD. All of theseAnswer: B

47. The property of materal by which it can be rolled into sheets is called:A. ElasticityB. PlasticityC. DuctilityD. MalleabilityAnswer: D

48. Schmitt trigger is also known as :A. Sweep circuitB. Blocking oscillatorC. Swuaring circuitD. Stable multi vibratorAnswer: C

49. A triac is aA. Two terminal bi-directional switchB. Three terminal bi-directional switchC. Two terminal uni-directional switchD. Three terminal uni-directional switchAnswer: B

50. Cyclo converter converts ;A. AC to DCB. DC to ACC. A fixed AC to a variable magnitude ACD. A fixed DC to a variable magnitude DCAnswer: C51. Which one of the following is not a scalar quantity?A. VolumB. MassC. ForceD. LengthAnswer: C

52. In a well conditioned triangle, no angle should be less then :A. 60oB. 50oC. 30oD. 45oAnswer: C

53. The reduced bearing of a line is N 87o W. Its whole circle bearing is :A. 273oB. 3oC. 93oD. 87oAnswer: A

54. The resultant of two forces P and Q acting at an angle is given by :A. (P2 + Q2 + 2PQ tan)B. (P2 + Q2 + 2PQ sin)C. (P2 + Q2 + 2PQ cos)D. P2 + Q2 + 2PQ tanAnswer: C

55. Primary storage in computer terminology refers to :A. Hard Disc DriveB. Random Access Memory (RAM)C. Read Only Memory (ROM)D. The storage device where the operating system is storedAnswer: B

56. In an examination, a student gets 4 marks for every correct answer and loses 1 mark for every wrong answer. If her attempts in all 60 questions and secures 130 marks, then fine the number of questions he attempted correctly.A. 42B. 48C. 36D. 38Answer: D

57. The Fundamental Duties of the Indian Citizens are incorporated in the following Artice of our constitution?A. Article 21 AB. Article 51 AC. Article 370 AD. Article 19 AAnswer: B

58. If x/y =9/5, then find the value of (x2 + y2)/(x2 y2)A. 11B. 61/11C. 11/5D. 6Answer: B

59. Which device changes the alternatting e.m.f. generated by the D.C. Generator in its armature coil to D.C. ?A. SlipringB. RectifierC. CommutatorD. None of theseAnswer: C

60. A simply supported beam of length L is loaded with a uniformly distributed load of w per unit lenth. The maximum bending moment will be:A. wL2/4B. wL2/8C. wL2/2D. wL2Answer: B

61. Jama Masjid at Delhi was built by:A. AkbarB. JahangirC. Shah JahanD. AurangzebAnswer: C

62. Arrange the fractions 3/5. 4/7, 8/9 and 9/11 in their descending order :A. 8/9 > 9/11 > 3/5 > 4/7B. 9/11 > 8/9 > 4/7 > 3/5C. 3/5 > 4/7 > 8/9 > 9/11D. 4/7 > 8/9 > 3/5 > 9/11Answer: A

63. Find the average of all prime numbers between 30 and 50 :A. 48B. 39C. 39.8D. 38Answer: C

64. Acyclotron is a :A. Bunch of Gamma RaysB. High Frequency OscillatorC. Particle AcceleratorD. None of theseAnswer: C

65. Who is the winner of Nobel Prize, 2014 in the field of Economics ?A. Patrick ModianoB. MAlala YousafzaiC. Jean TiroleD. Kailash SatyarthiAnswer: C

66. The Indian Standard Time(I.S.T.) is ahead of Greenwich Mean Time (G.M.T.) by :A. 6. hoursB. 5 hoursC. 6 hours 30 minutesD. 5 hours 30 minutesAnswer: D

67. Which of the following processes is generally used for mass producation of connecting rod of Auromobile Engines ?A. Sand CastingB. Cold HeadingC. ForgingD. SpinningAnswer: C

68. The load which does not change its magnitude and position with time is calledA. Live loadB. Dynamic loadC. Creep loadD. Dead loadAnswer: D

69. A byte is group of :A. 2 bitsB. 4 bitsC. 8 bitsD. 16 bitsAnswer: C

70. If log8 x = 2/3, then the value of x is :A. 16/3B. 4/3C. 12D. 4Answer: D

71. ________ will translate the complete programme at once from a high level language to the machine language.A. CompilerB. AssemblerC. JoystickD. BusAnswer: A

72. Pipe P can fill a tank in 36 hours and pipe Q can fill this tank in 45 hours. If both the pipes are opened simultaneously, then how much time will be taken to fill this tank ?A. 20 hoursB. 40 1/2 hoursC. 9 hoursD. 42 hoursAnswer: A

73. Find out the term which is different from other terns in the following :22, 33, 66, 99, 121, 279, 594A. 99B. 121C. 279D. 594Answer: C

74. A CRO can display :A. D.C. signals onlyB. A.C. signals onlyC. Both D.C and A.C. signalsD. Time invariant signalsAnswer: C

75. The Quit India Movement was launched in the year :A. 1920 A.D.B. 1930 A.D.C. 1942 A.D.D. 1946 A.D.Answer: C

76. If a thin rectangular plate of 60 mm X 30 mm is inclined at an angle of 60o to the Horizonatal Plane, its top view may be :A. Square of 30 mm sizeB. Square of 60 mm sizeC. Rectangle of 60 mm X 45 mm sizeD. Rectangle of 45 mm X 30 mm sizeAnswer: A

77. A file which contains transient data to be processed in combination with master file is called:A. Sequential fileB. Master fileC. Random organization fileD. Transmission fileAnswer: D

78. Find the missing them of the following series :BZA, DYX, FXE, ______, JVL.A. HWGB. HUGC. WHGD. GUHAnswer: A

79. Who is the President of China ? (As on 01.11.2014)A. Li KeqiangB. Xi JinpingC. Shinzo AbeD. Hu JintaoAnswer: B

80. Zeroth Law of thermodynamics forms the basis of __________ measurement.A. PressureB. TemperatureC. WorkD. MomentumAnswer: B

81. Who wrote Indica ?A. KautilyaB. KalidasaC. ShudrakaD. MagesthenesAnswer: D

82. Red rot is a plant disease which affects:A. WheatB. RiceC. SugarcaneD. CottonAnswer: C

83. Which one of the following is also known as Red Planet ?A. MercuryB. VenusC. EarthD. MatsAnswer: D

84. Find the angle between the hour hand and the minute hand of a clock when the time is 10.25 hours i.e., 25 minutes pasr 10 ?A. 180oB. 165oC. 162 1o/2D. 152 1o/2Answer: C

85. Which of the following Amplifiers produces the least distortion ?A. CLass AB. Class BC. Class ABD. Class CAnswer: A

86. What is 15 % of 34 kg ?A. 3.4 kgB. 3.75 kgC. 4.50 kgD. 5.10 kgAnswer: D

87. Who is the Chief Minister of Tamil Nadu ? (As on 0.1.11.2014)A. Mr. O. PannerselvamB. Mr. J. JayalalithaC. Mr. KarunanidhiD. Mr. Dayanidhi MaranAnswer: A

88. Which of the following is a universal gate ?A. ANDB. NANDC. ORD. NORAnswer: B

89. Who is the Chairperson of National Commission for Women in India ? (As on 01.11.2014)A. Jayanti PatnaikB. Girija VyasC. Mamta SharmaD. Lalitha KumaramangalamAnswer: D

90. BOD(Bio Chemical Oxygen Demand) of safe drinking water must be :A. 0B. 50 ppmC. 100 ppmD. 200 ppmAnswer: A

91. In an examination, 35% of the students passed and 455 failed. How many students appeared for the examination?A. 700B. 1300C. 845D. 1250Answer: A

92. Pointing to a man in a photograph, Asha said, His mothers only daughter is my mother. How is the man related to Asha ?A. BrotherB. Maternal UncleC. Grand fatherD. FatherAnswer: B

93. Galena is an ore of :A. LeadB. CopperC. AluminiumD. IronAnswer: A

94. Which of the following is a presentation graphics software?A. MS WindowsB. MS WordC. MS ExcelD. MS PowerPointAnswer: D

95. Boyles ;aw states that :A. The pressure of a gas varies directly with remperature at constant volume i.e. Pat.B. The product of pressure and volume of a given mass of as gas is constant at constant temperature i.e. PV = constant.C. The volume of a gas varies directly with temperature at constant pressure i.e. VaT.D. The pressure of a gas varies directly with volum at constant temperature i.e. PaT.Answer: B

96. Weld spatter is a/an :A. FluxB. ElectrodeC. Welding defectD. None of theseAnswer: C

97. The nucleus of an atom generally, contains :A. Protons and NeutronsB. Protons and ElectronsC. Electrons and NeutronsD. Only NeutronsAnswer: A

98. The dimensions of a brick are 10 cm X 4 cm X 3cm. What is the total surface area of the brick ?A. 82 cm2B. 164 cm2C. 120 cm2D. 180 cm2Answer: B

99. A bullet is fired vertically upwards with a velocity of 196 m/sec. What is the maximum height reached by the bullet ? (Assuming g = 9.8 m/seccm2)A. 1960 mB. 196 mC. 980 mD. 490 mAnswer: A

100. With which of the following, the intrinsic semi conductor Silicon be doped in order to obtain p-type semi-conductor ?A. BoronB. PhosphorusC. GalliumD. None of theseAnswer: A101. What has it maximum density at :A. 0oCB. 100oCC. 50oCD. 4oCAnswer: D

102. Compiler and interpreters are examples of :A. System softwareB. Application softwareC. Both (A) and (B)D. None of theseAnswer: A

103. Giddha is a folk dance of :A. PunjabB. Uttar PradeshC. AssamD. MaharashtraAnswer: A

104. The entropy of universe tends to be :A. MinimumB. ZeroC. AverageD. MaximumAnswer: D

105. The angle of elevation of a ladder leaning a against a wall is 60o i.e. ladder makes an angle of 60o with the ground. The foot of the ladder is 4.6 metres away from the wall. What is the length of this ladder ?A. 9.2 mB. 2.3 mC. 6.9 mD. 7.8 mAnswer: A

106. The total number of bones in the average adult human skeleton is :A. 350B. 206C. 115D. 540Answer: B

107. A 4 pole, 1500 r.p.m. alternator will generate e.m.f. at :A. 20 HzB. 60 HzC. 40 HzD. 50 HzAnswer: D

108. Disinfection of drinking water is done to remove :A. OdourB. BacteriasC. TurbidityD. ColourAnswer: D

108. A conductor of axial length 30 cms carries a current of 100 A and lies at right angle to a magnetic field of strength 0.4 tesla. What is the force exerted on it ?A. 10 NB. 12 NC. 1.2 ND. 0Answer: A

110. The Headquarters of West Central Railway is located at :A. JabalpurB. JaipurC. AllahabadD. AhmedabadAnswer: B

111. Ampere second is the unit of :A. ChargeB. PowerC. VoltageD. EnergyAnswer: A

112. Find the missing tern of the following series : 4, 7 ,12, ___?____, 28, 39A. 17B. 18C. 21D. 19Answer: B

113. Identify the city which faced large scale destructions due to Hudhud cyclone recently?A. ChennaiB. visakhapatnamC. KolkataD. HyderabadAnswer: A

114. A gate in which all inputs must be high to get low output is :A. An inverterB. AND gateC. NOR gateD. NAND gateAnswer: D

115. The area of an equilateral triangle is 243 cm2. What is the perimeter of the equilateral triangle ?A. 96 cmB. 46 cmC. 126 cmD. 66 cmAnswer: C

116. Global warming is caused by :A. N2B. CO2C. OzoneD. None of theseAnswer: B

117. In sand Moulding the top flask is known as :A. CopeB. DragC. CheckD. FilletAnswer: A

118. The United NAtions Day (U.N.Day) is celebrated every year on :A. Dec 26B. Nov 14C. Sept 5D. Oct 24Answer: D

119. For which of the follwoing applications, a D.C. motor is preferred over an A.C. Motor?A. Variable speed operatioinB. High speed operationC. Low speed operationD. Fixed speed operationAnswer: A

120. Projection of an object shown by three views is known as :A. PerspectiveB. ObliqueC. OrthographicD. None of theseAnswer: C

121. Fins are provided on heat transferring surface in order to increase :A. Heat trnsfer areaB. Heat transfer coefficientC. Temperature gradientD. Mechanical strength of the equipmentAnswer: A

122. A transformer has 1000 primary turns. It is connected to 250 volts A.C. supply. Find the number of secondary turns to get secondary voltage of 400 volts.A. 1600B. 625C. 100D. 1250Answer: A

123. Find the L.C.M. of 148 and 185.A. 680B. 740C. 2960D. 3700Answer: B

124. What is the General formula of Alkanes ?A. CnH2n+2B. CnH2nC. CnH2n-2D. CnH2n+4Answer: A

125. The sum of two numbers is 40 and the difference of these two numbers is 4. Find the ratio of these of numbers,A. 11 : 9B. 11 : 18C. 22 : 9D. 17 : 13Answer: A

126. The Servants of India Society was founded by :A. Jyotiba PhuleB. G.K. GokhaleC. B.G. TilakD. B.R. AmbedkarAnswer: B

127. Power Loss in aresistor is given by :A. P = V2RB. P = V/IC. P = I2/RD. P = V2/RAnswer: D

128. The Pollutant responsible for ozone holes i s:A. CO2B. COC. SOO2D. CFCAnswer: D

129. With the formation of Telangan, how many States are there in our country now?A. 30B. 29C. 28D. 31Answer: B

130. IF 22n-1 = 1/8n-3, then the value of n is :A. 3B. 2C. 0D. -2Answer: B

131. Goutam Buddha delivered his first sermons at :A. KusinagarB. SarnathC. PataliputraD. VaishaliAnswer: B

132. Ravi runs 200 metres in 24 seconds. Find his average speed :A. 20 km/hB. 24 km/hC. 28.5 km/hD. 30 km/hAnswer: D

133. How many terms are these in the following series ?201, 208, 2015, .., 369.A. 26B. 25C. 24D. 23Answer: B

134. If a point moves in a plane in such a way that the sum of its distances from two fixed points is constant, the curve so traced is called :A. ParabolaB. EllipseC. HyperbolaD. All of theseAnswer: B

135. Ammonia is prepared commercially by the :A. Oswald processB. Hall processC. Contact processD. Haber processAnswer: D

136. Lokprivya Gopinath Bardoloi International Airport is located at :A. JaipurB. BangaloreC. GuwahatiD. HyderabadAnswer: C

137. The elements which have same mass number but different atomic numbers are known as:A. IsotonesB. IsobarsC. IsotopesD. HalogensAnswer: B

138. Which one of the following is not a Noble GasA. HeliumB. BromineC. ArgonD. NeonAnswer: B

139. The BIS code which deals with steel structures is :A. BIS : 456B. BIS : 800C. BIS : 875D. BIS : 1893Answer: B

140. To be eligible for elected as president, a condidate must be :A. Over 25 years of ageB. Over 30 years of ageC. Over 35 years of ageD. Over 60 years of ageAnswer: C

141. At what temperature, bothCelsius and Fahrenheit scales will show the identical readings ?A. 100oB. 0oC. -40oD. 40oAnswer: C

142. Time constant of a series R-L Circuit is :A. LR secondsB. L/B secondsC. L2R secondsD. LR2 secondsAnswer: B

143. A capacitor stores 1 coulomb at 10 volts. It capacitance is (f = farad) :A. 1 fB. 10 fC. 0.1 fD. 0.01 fAnswer: C

144. M.C. (Moving Coil) and M.I. (Moving Iron) type of instruments can be distinguished by their :A. RangeB. Size of terminalsC. PointerD. ScaleAnswer: D

145. Which of the following flip-flops is used as Latch ?A. JK flip-flopB. RS flip-flopC. D flip-flopD. T flip-flopAnswer: B

146. Identify the disease which is caused due to deficiency of Protein ?A. ScurvyB. Beri-BeriC. Night-BlindnessD. KwashiorkorAnswer: D

147. Hopkinsons test for D.C. motors is conducted of :A. Low LoadB. Half LoadC. Full LoadD. No LoadAnswer: C

148. If fineness Modulus of sand is 2.5, it is graded as :A. Medium sandB. Fine sandC. Coarse sandD. Very coarse sandAnswer: B

149. Large scale deforestation decreases :A. Soil ErosionB. Ran fallC. DroughtD. Global warmingAnswer: B

150. Hot Wire Instruments read :A. Peak valueB. AverageC. r.m.s. valueD. None of theseAnswer: C