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RRB JE 2012 Solved Paper PDF Download

RRB JE 2012 Solved Paper PDF Download

Railway Junior Engineer 2012 Solved Paper

rrb-je-2012-papers-pdf

Question Paper

1. What is the value of knee voltage of silicon diode?
1) 0.3 V
2) 0.33 V
3) 0.7 V
4) 1.1 V
Ans- (3)

2. Which organisation has proposed first to constitute the Constitution Assembly to form the Indian Constitution?
1) Swaraj Party in 1928
2) Indian National Congress in 1936
3) Muslim League in 1942
4) By all parties convention in 1946
Ans- (2)

3. There is 20 volt across the inductor and 15 volt across the resistance in the a.c. supplied series R-L circuit. What would be the supply voltage?
1) 20 volt
2) 15 volt
3) 25 volt
4) 17.5 volt
Ans- (3)

4. A transformer mainly transforms …..
1) Current
2) Voltage
3) Frequency
4) Power
Ans- (4)

5. What is the power factor of a pure resistor circuit?
1) One
2) Zero
3) Leading
4) Lagging
Ans- (1)


6. Functions of N.S.D.L. are related to—
1) Bearer bonds
2) GDRs
3) Electronic share
4) Debenture
Ans- (4)

7. There are rings around which of the following planets?
1) Uranus
2) Mars
3) Jupiter
4 Saturn
Ans- (4)

8. _____is used to heat the non-coductors.
1) Eddy current heating
2) Arc heating
3) Induction heating
4) Dielectric heating
Ans- (4)

9. What is the S.I. Unit of magnetic flux density?
1) Gauss
2) Tesla
3) Oersted
4) Weber
Ans- (2)

10. Which type of oscillator is most stable in a simple circuit?
1) Crystalline oscillator
2) Clapp oscillator
3) Colpitts oscillator
4) Armstrong oscillator

11. Where is the headquarters of Geological Survey of India located?
1) Patna
2) Dehradun
3) Kolkata
4) Agra

12. What is the proper use of signal generator?
1. Designing
2. Testing
3) Repairing
4) All the above

13. Nasik is situated on the bank of which river?
1) Godavari
2) Narmada
3) Tapti
4) Shipra

14. Who started the Shaka era?
1) Ashoka
2) Chandragupta-II
3) Kanishka
4) Harsha

15. If one cylinder of a diesel engine receives more than the others, then for that cylinder the …..
1) exhaust till be smoky
2) piston rings would stick into piston grooves
3) scavenging occurs
4) engine starts over heating

16. The information is sent by CW transmitter by—
1) Changing the audio frequency
2) Interrupting radio signal
3) Using microphone
4) Using camera

17. Moisture can be removed from lubricating oil using ………………
1) Tubular centrifugal
2) Clarifier
3) Sparkler filter
4) Vacuum leaf filter

18. The rank of the following matrix is—
1) 0
2) 1
3) 2
4) 3

19. Germanium possesses—
1) Two velence electrons
2) Three velence electrons
3) Four velence electrons
4) Five velence electrons

20. Share of export from India is the maximum to the following country—
1) U.S.A.
2) U.K.
3) U.A.E.
4) Japan

21. Which of the following is not a property of difference amplifer?
1) Capacitor is used in it
2) It is used to compare two signals
3) Difference amplifer yields more than the direct couple  amplifer
4) Frequency of difference amplifer remains flat from zero to high frequency

22. Where  are the caves of Ajanta located?
1) Orissa
2) Kerala
3) Maharashtra
4) Madhya Pradesh
23. Calorie value is the least of the following materials—
1) Coal gas
2) Producer gas
3) Steam fiery gas
4) Oil gas

24. The value of ∫x/cos2X is equal to which of the following?
1) x tan x
2) log cos x
3) x tan x + log cos t
4) x tan x – log cos x

25. The colonial system of the company was formalized by—
1) Battle of Plassey
2) Battle of Buxar
3) Battle of Panipat
4) Battle of Wandiwash

26. Natural rubber is polymer of—
1) Isobutane
2) Isoprene
3) Propane
4) Isopropene

27. For generating large currents on D.C. generators which winding is generally preperred?
1) Progressive wave winding
2) Lap winding
3) Retrogressive wave winding
4) Current depends on design

28. A.C. servomotor is basically a / an …..
1) Universal motor
2) Single phase induction motor
3) Two phase induction motor
4) Three phase induction motor

29. co-efficient of velocity as compared to the coefficient of discharge is—
1) Less
2) More
3) Equal
4) Less or more depending on flow

30. The capacitance, in force-curent analogy, is analogous to—
1) Momentum
2) Velocity
3) Displacement
4) Mass

31. ______ Signal will become zero when the feedback signal and reference signs are equal.
1) Input
2) Actuating
3) Feedback
4) Reference

32. Most of the weather phenomena take place in the—
1) Stratosphere
2) Troposphere
3) Tropopause
4) Ionosphere

33. Motor-generator set for D.C. are welding has generator of—
1) Series type
2) Shunt type
3) Differentially compound type
4) Level compound type

34. Which of the following motors is preferred when quick speed reversal is the main consideration?
1) Squirrel cage induction motor
2) Wound rotor induction motor
3) Synchronous motor
4) D.C. motor

35. In case of ball bearings, which part is made harder than others—
1) Ball
2) Outer-race
3) Inner race
4) All are made equally hard

36. Selectivity of the receiver can be increased by which of the following?
1) By using more tuned circuit
2) By decreasing number of tuned circuit
3) By using loudspeaker
4) By increasing gain of the receiver

37. An electronics circuits in which different components such as Diode, Resistor and Capacitor etc, are connected separately is called—
1) Chassis
2) Printed board
3) Integrated circuit
4) Discrete circuit

38. Indicated power of a 4-stroke engine is equal to—
1) pLAN
2) 2pLAN
3) pLAN / 2
4) 4 pLAN
Where p = Mean effective pressure, L = Stroke, A = Area of piston and N = rpm of engine

39. What are Ferrites?
1) Magnetic but have low resistance
2) Magnetic but have high resistance
3) Non- magnetic with low resistance
4) Non- magnetic with high resistance

40. The translator program that converts source code in high level language into machine code line by line is called—
1) Assembler
2) Compiler
3) Loader
4) Interpreter

41. National Library, the largest inIndia is located at—
1) Chennai
2) Mumbai
3) Delhi
4) Kolkata

42. Pak Strait joins which of the following two countries—
1) India-Pakistan
2) India-Myanmar
3) India-Sri lanka
4) None of these

43. Who had appointed the first Prime Minister of India?
1) Lord Mountbatten
2) C.Rajagopalachari
3) President of India
4) None of these

44. Who had demarcated the border-line between India and Pakistan?
1) McMohan
2) Lord Durand
3) Radcliffe
4) None of these

45. Approximate thermal efficiency of petrol engine is—
1) 20%
2) 30%
3) 50%
4) 75%

46. Which of the following is the universal gate?
1) NAND-Gate
2) Or-Gate
3) AND-Gate
4) NOT-Gate

47. How will a red flower appear, if it is seen through a green glass?
1) Red
2) Brown
3) White
4) Green

48. What is the unit of electrical energy?
1) Ampere
2) Volt
3) Watt
4) Kilowatt-hour

49. A diode …….
1) Functions only in one direction
2) ) Functions in both the direction
3) Does not function at all
4) It gets damaged, when voltage is applied

50. What is the frequency of the receiver?
1) 488 kHz
2) 445 kHz
3) 455 kHz
4) 456 kHz

51. When were the Indian States organised on the basis of language?
1) 1947
2) 1950
3) 1956
4) 1952

52. What would be the expenditure in 30 days at the rate of 50 paise per unit, if a bulb of 100 W is used five hours per day?
1) Rs. 10.50
2) Rs. 8.50
3) Rs. 7.50
4) Rs. 9.50

53. Lever functions on which of the following principles?
1) Crankshaft
2) Joining rod
3) Crank Pin
4) Crosshead

54. Protein is not available in which of the following?
1) Meat
2) Milk
3) Rice
4) Pulse

55. In steam turbine the action of steam is—
1) Stable
2) Dynamic
3) Stable and Dynamic
4) Neither stable nor  dynamic

56. Among the following statement which is false?
1) Only minority impurities are added in a junction diode
2) Higher temperature increases the leakage current of the diode
3) A simple zener diode works when connected between anode to cathode
4) Zener is mostly used in voltage regulator

57. In resistance heating, the highest working temperature is obtained from heating elements made of…
1) Nickel and copper
2) Nichrome
3) Silicon carbide
4) Silver

58. In higher pair, the relative motion is—
1) Purely turning
2) Purely sliding
3) Purely rotary
4) Combination of sliding and turning

59. The least populated Stae in India is—
1) Goa
2) Sikkim
3) Manipur
4) Arunachal Pradesh

60. In the case of gas turbines, the gaseous fuel consumption guarantees are based on—
1) High heat value
2) Low heat value
3) Net calorific value
4) Middle heat value

61. In a resistive load, power dissipation would be proportional to—
1) Current
 2) 1/Current
3) (Current)2
4) 1/(Current2)

62. An automatic toaster is a ….. loop control system.
1) Open
2) Closed
3) Partially closed
4) None of the above

63. A transistor draws a base current of 100 microamperes when the collector current is 10 milliampere, what is the value of its ‘α’?
    
1) 101/100
 2) 100/101
3) 1000/10001
4) 10/11

64. Who of the following was not the acting President of India?
1) I.V.V.Giri
2) B.D. Jatti
3) Hidayatullah
4) Zakir Hussain

65. The northernmost limit of India is—
1) 36041 N Latitude
2) 37081 N Latitude
3) 37061 N Latitude
4) 360121 N Latitude

66. When the load is above ______, a synchronous motor is found to be more economical.
1) 2 KW
2) 20 KW
3) 50 KW
4) 100 KW

67. The first summit of NAM was held at—
1) Cairo
2) Lusaka
3) Belgrade
4) New Delhi

68. To convert moving coil galvanometer into an ammeter, which of the following methods is used?
1. Small resistsnce in series
2. Small resistsnce in parallel
3. High resistsnce in series
4) High resistsnce in parallel

69. Following figure shows the curves of efficiency versus compression ratio for various cycles in I.C. engines. For constant volume cycle, the curve applicable is—
1) A
2) B
3) C
4) D

70. The minimum value of the function y = x5 – 4x4 + 5x3 – 1 will occur when the value of x is equal to—
1) 0
2) 1
3) 2
4) 3

71. Which one of the natural regions is known as the ‘Bread Basket’ of the world?
1) The steppe region
2) The mediterranean region
3) The monsoon region
4) The equatorial region

72. When input signal in transistor amplifier is applied between base and emitter and out pit is taken from emitter and collector, then what the configuration is called?
1) Common emitter
2) Common base
3) Common collector
4) None of these

73. Which of the following can be used to control the speed of a D.C. motor?
1) Thermistor
2) Thyristor
3) Thyratron
4) Transsistor

74. The transient response of a system is mainly due to—
1) Inertia forces
2) Internal forces
3) Stored energy
4) Friction

75. Minority carrier in P-type semi-conductor are—
1) Free electrons
2) Free holes
3) Holes and electrons both
4) Holes minus electrons

76. Pulley in a belt drive acts as—
1) Cylindrical pair
2) Turning pair
3) Rollimg pair
4) Sliding pair

77. D.C. shunt relays are made of—
1) Few turns of thin wire
2) Few turns of thick wire
3) Many turns of thin wire
4) Many turns of thick wire

78. The movement that came to an abrupt end due to the Chauri-chaura incident was the—
1) Wahabi movement
2) Home rule movement
3) Non-cooperation movement
4) Civil disobedience movement

79. While checked with a multimeter, an open resistor reads—
1) Zero
2) Infinite
3) High but within toleance
4) Low but not zero

80. In amplitude modulation—
1) Amplitude of the carrier is kept constant
2) Change occurs in carrier frequency
3) Amplitude is varied according to the instantaneous value of modulating wave
4) None of these

81. Oscillator operates on sub-harmonic frequency because—
1) Lower frequency gives better stability
2) It gives linear output
3) Last stages are used
4) More stages are used
82. Hopkinson’s test on D.C. machines is conducted at—
1) No-load
2) Part load
3) Full load
4) Over load

83. Emitter follower is also called as-
1) Common emitter
2) Common base
3) Common collector
4) SCR

84. The example of lower pair is-
1) Shaft revolving in a bearing
2) Straight line motion mechanisms
3)Automobile steering gear
4) All of the above

85. Which is true statement among the following?
1) Main function of the detector is to suppress the image signal
2) Noise is very low in crystal detector
3) Super-regenerative is less sensitive
4) Diode detector is more sensitive

86. The first governor-General of India under East India Company was-
1) Cornwallis
2) Wellesly
3) Warren Hastings
4) Sir John Shore

87. The expression J p dV can be used for obtaining work of-
1) Non-flow reversible process
2) Steady flow reversible process
3) Adiabatic irreversible process
4) Throttling process

88. In connection with oscillator, which is FALSE statement?
1) Oscillator convrts d.c into a.c.
2) Oscillator is that amplifier which provides its own input
3) All types of Oscillator produce sine wave
4) In phase, feedback used in Oscillator is also is also called positive feedback.

89. The index of compression n tends to reach ratio of specific heats ϒ when-
1) flow is uniform and steady
2) process is isentropic
3) process is isothermal
4) process is isentropic and specific heat does not change with temperature

90. Who of the following attended all the three Round Table Conferences?
1) B.R. Ambedkar
2) M.M.Malviya
3) Vallabhbhai Patel
4) None of the above

91. For which of the following substances, the internal energy and enthalpy are the functions of temperature only-
1) Any gas
2) Saturated steam
3) Water
4) Perfect gas

92. Frequency multiplier stage of the transmitter operates under-
1) Class C
2) Class A
3) Class AB
4) Class B

93. Which of the following is used in the blast furnace as flux?
1) Fluorspar
2) Quartzite
3) Limestone
4) Ferro-manganese

94. An air vessel is usually provided at the summit of a syphon in order to-
1) Regulate the flow
2) Increase discharge
3) Avoid interruption in flow
4) Increase velocity

95. An exciter for a turbo genrator is a-
1) Separately excited generator
2) Shunt generator
3) Series generator
4) Compound generator    

96. Which of the following instruments is most accurate?
1) Vertical calliper
2) Manometric screw gauge
3) Optical projector
4) Mechanical comparator

                                        Sin x
97. The value of    Lt     ---------   is equal to—
                              x→∞    x
1) 1
2) -1
3) Zero
4) Infinity

98. In the given figure we see ABCD and a triangle EDC within it. E, F, G and H are midpoints of the four sides of the square AB, DC, AD and BC respectively. If these midpoints are joined together with straight lines e.g., E with F and G with H, then how many triangles will the figure have?
1) 9
2) 10
3) 11
4) 12

99. Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. in generator A and B will be ….
1) 2: 3
2) 3: 1
3) 3: 2
4) 1: 3

100. A frame-structure is nice if the number of its constituents is equal to…..
1) 2n-3
2) n-1
3) 2n-1

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  1. I download paper but it has no answers tick in this sheet

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