Electrical Junior Engineer Exam paper

Hi guys I am searching RRB Electrical Junior Engineer Exam paper , as I need it , so can one provide me same ??

[Quick Sam]

I have a paper for which you are looking this time. I would like to share with you that paper, I hope it would be helpful for you

RRB Junior Engineer (Electrical) Model Question Papers
1. A resistance of 10 ohm is connected across a supply of 200V. If resistance R is now connected in parallel with a 10
ohm resistance, the current drawn from the supply gets doubled. The value of unknown resistance R is
(a) 5 ohm
(b) 20 ohm
(c) 10 ohm
(d) 15 ohm
Ans : c
2. Kirchhoff’s first law is also called as
(a) voltage law
(b) Current law
(c) Mesh Current law
(d) All the above
Ans : b
3. Find the total resistance when four 3 Ohm resistance are connected in series
(a) 3 ohm
(b) 12 ohm
(c) 14 ohm
(d) 8 ohm
Ans : b
4. The practical unit of power is
(a) Joule
(b) Ampere
(c) Watt
(d) Weber

Ans : c
5. Form factor of a sine wave is
(a) 1.414
(b) 1
(c) 0
(d) 1.11
Ans : d
6. The unit of resistance is
(a) Mho
(b) ohm-m
(c) Ohms
(d) Amps
Ans :c
7. Unit of impedance is
(a) Ampere
(b) Volt
(c) Ohm
(d) mho
Ans : c
8. The close path of the flux around any current carrying circuit is referred as
Circuit.
(a) Magnetic
(b) Electric
(c) Electromagnetic

(d) None of these
Ans : a
9. The current flowing in an electrical circuit is due to the existence of
(a) mmf
(b) emf
(c) Resistance
(d) Reluctance
Ans : b
10. The magnetic flux flow through a magnetic circuit is due to
(a) mmf
(b) emf
(c) Resistance
(d) Reluctance
Ans : a
11. The on-line UPS is also called as
a. Stand-by UPS
b. Line Interactive UPS
c. Off line UPS
d. Current line UPS
Ans. b
12. ________ is used to convert alternating current to direct current.
a. Transformer
b. Diode
c. Resistor
d. Transistor

Ans. b
13. The supply voltage varies sinusoid ally and has a frequency __________ Hz.
a. 60
b. 50
c. 20
d. 10
Ans. b
14. Expression for magneto-motive force is
(a) N/I
(b) 1/NI
(c) I/N
(d) IN
Ans : d
15. Unit of mmf is
(a) Ampere /Volt
(b) Ampere- turns
(c) Volt
(d) Volt/Ampere
Ans : b
16. Magnetic field strength is equal to
(a) mmf. L
(b) L/ mmf
(c) mmf/ L
(d) 1/mmf.L

Ans : c
17. Peak inverse voltage of bridge rectifier is as that of centre-tap circuit.
a. Same
b. Twice
c. Half
d. Four times
Ans. c
18. Peak Resistance of the diode is increased when
a. Forward biased
b. Reverse biased
c. Both forward and reverse biased
d. Either a or b
Ans. b
19. The number of lines of force passing through the secondary coil S when unit current changes in the primary coil P
are called
(a) Self inductance
(b) Mutual inductance
(c) Self induction
(d) Mutual induction
Ans : c
20. Unit of flux
(a) Amp- turns
(b) Weber
(c) Volts
(d) Amps

Ans : b

1. The number of level in a digital signal is:
a) one
b) two
c) four
d) ten
2. A pure sine wave is :
a) a digital signal
b) analog signal
c) can be digital or analog signal
d) neither digital nor analog signal
3. The high voltage level of a digital signal in positive logic is :
a) 1
b) 0
c) either 1 or 0
4. A device that converts from decimal to binary numbered is called :
a) decoder
b) encoder
c) CPU
d) convertor
5. K is an abbreviation used with a number of units. Thus 2K means
a) 2000 units
b) 2048 units
c) 2024 units
d) none of these
6. Bit is:
a) smallest piece of electronic hardware
b) a drilling tool
c) an abbreviation for binary digit
d) the smallest number
7. A register is:
a) a group of memories
b) a group of devices that store digital data
c) a chip used in computer
d) a pure silica piece used in digital system
8. A typical microcomputer has 65,536 registers in its memory. It will be
specified as :
a) 65,536 memory
b) 65,536 K memory
c) 64 K memory
d) 8 K memory
9. Nibble is :
a) a string of 4 bits
b) a string of 8 bits
c) a string of 16 bits
d) a string of 64 bits
10. The high voltage level of a digital signal in negative logic is :
a) 1
b) 0
c) either 1 or 0
11.Number of gates/chip in SSI :
a) < 12
b) < 100
c) < 1000
d) > 1000
11. Number of gates/chip in LSI :
a) < 12
b) Between 12 and 99
c) < 1000
d) > 1000
12. Number of gates/chip in VLSI :
a) < 12
b) < 100
c) < 1000
d) >10000
13.The electronic, magnetic and mechanical devices of a computer are
known as:
a) CPU
b) memory
c) hardware
d) radix
14. Ordinary electrical switch is:
a) Analog
b) Digital
c) None of the above
15. Train of pulses is:
a) Analog
b) Digital
c) None of the above
16. Octal 16 is equal to decimal:
a) 13
b) 14
c) 15
d) 16
17. The binary number 101101 is equal to octal number:
a) 65
b) 55
c) 51
d) 45
18. Binary number 101101 when converted to its 2’s complement will
become :
a) 0101.01
b) 0100.11
c) 0100.10
d) 0101.10
19. The sum of binary numbers 11111 and 00001 is given by :
a) 100100
b) 100000
c) 100001
d) 100010
20. The hexadecimal digits are :
a) 1 to 16
b) 1 to 9
c) 0 to 9
d) 1 to 6
21. A gate in which all input must be low to get a high output is called:
a) an inverter
b) A NOR gate
c) an AND gate
d) a NAND gate
22. A NAND circuit with positive logic will operate as :
a) NOR with negative logic
b) AND with negative logic
c) OR with negative logic input
d) AND with positive logic output
23. To implement all function of the basic logic function, is sufficient to
have:
a) OR
b) NOT
c) AND NOT
d) none of these
24. Which of the following ICs has only one NAND gate:
a) 7410
b) 7420
c) 7430
d) 7447
25. OR operation is:
a) X + XY
B) XY
C) X+Y
D) (X+Y) (X+Y)
26. AND operation is:
a) X(X + Y )
B) XY
C) X+Y
D) (X+Y) (X+Y)
27. NOR operation is:
a)X + Y
B) XY
C) X+Y
D) (X+Y) (X+Y)
28. NAND operation is:
a)X + Y
B) XY
C) X+Y
D) (X+Y) (X+Y)
29. What is the no. of OR IC. :
a) 7402
b) 7486
c) 7432
d) 7404
30. What is the no. of AND IC. :
a) 7402
b) 7408
c) 7447
d) 7492
32. What is the no. of NOR IC. :
a) 7402
b) 7486
c) 7447
d) 7492
33. What is the no. of NAND IC. :
a) 7402
b) 7404
c) 7400
d) 7492
34. What is the no. of NOT IC. :
a) 7402
b) 7486
c) 7404
d) 7492
35. What is the no. of EX-OR IC. :
a) 7402
b) 7486
c) 7447
d) 7492
36. Which of the following ICs has three input NAND gate:
a) 7420
b) 7430
c) 7410
d) 7474
37. Which of the following is Boolean eq. of EX-OR gate:
a) A+B
B) A+B
C) AB
D) A B + A B
38. Which one is the universal gate:
a) AND gate
b) OR gate
c) NAND gate
d) EX-OR gate
39. Bubbles on the gate shows
a) active high
b) active low
c) both a and b
d) none
40. Which statement is verify NAND gate :
a) if all input are high output is low
b) if all input are low output is low
c) any one n are low output is low
d) none of them
41. In regard to NAND gate the following four statement are made:
1. it is equivalent to an AND gate followed by an inverter
2. if all input to it are low, the output is low
3. if all input are high, the output is low
4. NAND operation on two elements is equivalent to OR operation on them.
OF thses, the only true statements are
a) 1,2
b) 1,3
c) 1,4
d) 2,4
42.The Gray code for number 7 is :
a) 1100
b) 1001
c) 0100
d) 0110
43. The gray code for number 2 is :
a) 0010
b) 0011
c) 1000
d) 0101
44. The gray code for number 6 is :
a) 1100
b) 1001
c) 0101
d) None of the above
45. The Excess 3 for number 6 is :
a) 1100
b) 1001
c) 0101
d) 0110
46. The excess 3 number 8 is:
a) 1100
b) 1011
c) 0101
d) 0110
47. BCD numbers are obtained by :
a) converting decimal number to binary
b) converting decimal to octal number
c) each decimal digit is represented by a four bit binary
d) converting binary to decimal
48. (100101.
2
is
a) (37.
10
b) (69.
10
c) (41.
10
d) (5.
10
49. (1001-10) is equal to :
a) 7
b) 8
8
c) 7
4
d) 8
4
50. Square root of 4 is :
a) 16
16
b) 2
10
c) 8
16
d) 5
16
51. In the expression A(A+B) by writing the first term A as A+0, the
expression is best simplified as :
a) A+AB
b) AB
c) A
d) A+B
52. A four bit number is given 1001. its one’s complement is :
a) 1001
b) 1110
c) 0110
d) 0111
53. The term VLSI generally refers to a digital IC having :
(a) more than 1000 gates
(b) more than 100 gates
(c) more than 1000 but less than 9999 gates
(d) more than 100 but less than 999 gates
54. The expression for sum of A, B in the half adder is given by:
a) AB
b) A + B
c) AÐ B
d) none of these
55. Which expression for the sum of full adder circuit.:
a) AB
B) A+B
C) A ® B
D) none of these
56. Combinational circuit has :
a) memory
b) no memory
c) flip-flops
d) counters
57. The sum of 111010
2
and 11011
2
in decimal form will be
a) 65
b) 75
c) 85
d) 95
58. The digit 0 with carry of I is the sum of binary addition:
a) 1 + 1
b) 1 + 0
c) 0 + 1