SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

172

1 hours

Created on August 14, 2023 By

Electrical Notebook

SSC JE Electrical / Mock Test Series : 2

Notification 2023 has been released on 26th July 2023. A total of 198 vacancies have been announced in various departments of the Central Government. The last date to apply online is 16th August. SSC JE 2023 Candidates with a degree/diploma in the relevant engineering stream are eligible for this post. The selection will be based on Computer Based Test (Paper I, Paper-II), Document Verification, and Medical Examination. Physical Standard Test/Physical Efficiency Test is conducted only for candidates applying in BRO.
The finally appointed candidates will get a salary range between Rs. 35,400/- to Rs. 1,12,400/-.

1 / 100

Category: AC Fundamental

1. In series R-L circuit power factor can be defined as –

A) All of these

B) R/Z

C) P/S

D) Vr/V

2 / 100

Category: AC Fundamental

2. In a R-L-C circuit, power loss takes place is –

A) L only

B) C only

C) R-L-C all

D) R only

3 / 100

Category: Magnetic Circuit

3. Electric field & magnetic field are interrelated and are known as –

A) Electromagnetic fields

B) Electromagnets

C) Electromagnetism field

D) Electric magnets

4 / 100

Category: Basic Electricity

4. If the voltage across a capacitor is constant, then current passing through it is ________

A) Infinity

B) 1

C) -1

D) 0

5 / 100

Category: Magnetic Circuit

5. If current in a conductor increases then according to Lenz's law self-induced voltage will –

A) Aid the increasing current

B) Produce current opposite to the increasing current

C) Tend to decrease the amount of current

D) Aid the applied voltage

6 / 100

Category: Basic Electricity

6. If there are two bulbs connected in series and one blows out, what happens to the other bulb?

A) The other bulb glows with increased brightness

B) The other bulb continues to glow with the same brightness

C) The other bulb stops glowing

D) The other bulb also burns out

7 / 100

Category: Magnetic Circuit

7. Energy stored in a magnetic field is given by –

A) L^2 I / 2

B) IL^2

C) LI^2 / 2

D) LI^2

8 / 100

Category: Basic Electricity

8. Ideal voltage source has-

A) Low internal resistance

B) Zero internal resistance

C) Infinity internal resistance

D) High internal resistance

9 / 100

Category: AC Fundamental

9. Average power taken by a pure capacitor is –

A) Maximum

B) Zero

C) Minimum

D) Unity

10 / 100

Category: Basic Electricity

10. Calculate the total current in the circuit

A) 15 A

B) 10 A

C) 11.43 A

D) 20 A

11 / 100

Category: Magnetic Circuit

11. In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will –

A) initially increase and then decrease

B) decrease

C) Increase

D) Remain the same

12 / 100

Category: Magnetic Circuit

12. In a magnetic material hysteresis loss takes place primarily due to –

A) its high retentivity

B) flux density lagging behind magnetising force

C) rapid reversals of its magnetisation

D) molecular friction

13 / 100

Category: Basic Electricity

13. Frequency of Direct Current is

A) 40 Hz

B) 0 Hz

C) 50 Hz

D) 50 kHz

14 / 100

Category: AC Fundamental

14. In a circuit containing R, L and C, power loss can take place in –

A) C only

B) R only

C) L only

D) All of these

15 / 100

Category: AC Machines & Transformer

15. In which device is the principle of statically induced E.M.F used?

A) Generator

B) Motor

C) Transformer

D) Battery

16 / 100

Category: Basic Electricity

16. If a sine wave goes through 10 cycles in 20 μs, the period is

A) 20 μs

B) 4 μs

C) 2 μs

D) 100 μs

17 / 100

Category: AC Fundamental

17. In a series R-C circuit, the applied voltage –

A) 90° leads the current

B) 90° lags the current

C) leads the current

D) lags the current

18 / 100

Category: Circuit Theory & Network

18. In a R-L-C series circuit, if the inductive reactance is greater than the capacitive reactance, then the power factor will be –

A) Zero

B) Unity

C) Leading

D) Lagging

19 / 100

Category: AC Fundamental

19. From the following when capacitive reactance will be more?

A) capacitance & supply frequency is more

B) Capacitance & supply frequency is less

C) capacitance is less & supply frequency is more

D) Capacitance is more & supply frequency is less

20 / 100

Category: Circuit Theory & Network

20. In a R-L-C series circuit, if the capacitive reactance is greater than the inductive reactance, then the power factor will be –

A) Lagging

B) Unity

C) Leading

D) Zero

21 / 100

Category: AC Fundamental

21. In a R-L-C circuit, power loss takes place is –

A) R-L-C all

B) C only

C) L only

D) R only

22 / 100

Category: Magnetic Circuit

22. If both the number of turns and the core length of an inductive coil are doubled, then its self-inductance will be –

A) quadrupled

B) Unaffected

C) halved

D) doubled

23 / 100

Category: Transformer

23. For a 55KVA, 11000 Volts/440 Volts, 50Hz single phase transformer, the values of primary and secondary currents are –

A) 30 A, 50 A

B) 100 A, 25A

C) 125 A, 5 A

D) 5 A, 125 A

24 / 100

Category: Basic Electricity

24. Calculate the equivalent resistance between A and B

A) 2 ohm

B) 8 ohm

C) 4 ohm

D) 6 ohm

25 / 100

Category: Basic Electricity

25. Calculate the total resistance between the points A and B.

A) 0 ohm

B) 7 ohm

C) 0.48 ohm

D) 7.67 ohm

26 / 100

Category: Basic Electricity

26. If a capacitor is connected with DC supply, it will act as –

A) A resistor

B) A normal capacitor as in AC

C) A short circuit

D) Open circuit

27 / 100

Category: Circuit Theory & Network

27. Battery is a

A) AC Sorce

B) None of the above

C) DC Source

D) Both of the above

28 / 100

Category: Magnetic Circuit

28. Calculate the emf induced in an inductor if the inductance is 10H and the current is 2 A in 4 s.

A) 1.5 V

B) 2.5 V

C) 5 V

D) 3.5 V

29 / 100

Category: Basic Electricity

29. Current & Potential Difference both can be measured using –

A) Multimeter

B) Ohmmeter

C) Ammeter

D) Voltmeter

30 / 100

Category: Magnetic Circuit

30. Calculate the value of energy stored in an inductor if the value of inductance is 10H and 2 A of current flows through it. –

A) 90 J

B) 20 J

C) 60 J

D) 15 J

31 / 100

Category: Basic Electricity

31. Calculate the current across the 20 ohm resistor

A) 36.67 A

B) 20 A

C) 6.67 A

D) 10 A

32 / 100

Category: Basic Electricity

32. If two bulbs are connected in parallel and one bulb blows out, what happens to the other bulb?

A) The other bulb blows out as well

B) The other bulb stops glowing

C) The other bulb continues to glow with the same brightness

D) The other bulb glows with increased brightness

33 / 100

Category: AC Fundamental

33. In series R-L circuit power factor can be defined as –

A) All of the above

B) Vr /V

C) R/Z

D) P/S

34 / 100

Category: Magnetic Circuit

34. If the current in a coil having a constant inductance of L henrys grows at a uniform rate, what is the value of the average current?

A) I/2

B) I

C) 0

D) I/4

35 / 100

Category: Basic Electricity

35. In a pure inductive circuit current is

A) Lags behind Voltage by 90°

B) Leads by voltage by 0°

C) Leads by voltage by 90°

D) Lags by voltage by 0°

36 / 100

Category: Basic Electricity

36. In a series circuit, which of the parameters remain constant across all circuit elements such as resistor, capacitor and inductor etc?

A) Current

B) Voltage

C) Neither voltage nor current

D) Both voltage and current

37 / 100

Category: Basic Electricity

37. Electric pressure is also called –

A) Resistance

B) Conductance

C) Energy

D) Voltage

38 / 100

Category: Basic Electricity

38. If a capacitor of capacitance 9.2F has a voltage of 22.5V across it. Calculate the energy of the capacitor.

A) 50625 W

B) 50.625 W

C) 5062.5 W

D) 506.25 W

39 / 100

Category: Basic Electricity

39. If the peak of a sine wave is 13 V, the peak-to-peak value is

A) 6.5 V

B) 26 V

C) None of the above

D) 13 V

40 / 100

Category: AC Fundamental

40. Average value can be defined based on which of the following? –

A) Voltage

B) Heating effect

C) Current

D) Charge transfer

41 / 100

Category: Basic Electricity

41. Calculate the value of energy stored in an inductor if the value of inductance is 10H and 2A of current flows through it.-

A) 20 J

B) 90 J

C) 15 J

D) 60 J

42 / 100

Category: AC Fundamental

42. If the inductive reactance of a coil is 6 ohm and internal resistance is 8 ohm, then the impedance will be –

A) 2 ohm

B) 10 ohm

C) 14 ohm

D) 2 ohm

43 / 100

Category: Basic Electricity

43. Electrolysis is possible with –

A) both A.C and D.C supply

B) D.C supply only

C) none

D) A.C supply only

44 / 100

Category: AC Fundamental

44. In an AC circuit (Sine wave) with R and L in series –

A) Voltage across R and L 180o out of face

B) The voltage across R leads the voltage across L by 90°

C) Voltage across R and L are in phase

D) The voltage across R lags the voltage across L by 90°

45 / 100

Category: Basic Electricity

45. If energy required to heat up a heater coil is 4 KWh and the energy loss is 20%, then what is the energy input?

A) 1 kWh

B) 2 kWh

C) 4 kWh

D) 5 kWh

46 / 100

Category: Magnetic Circuit

46. Hysteresis loss least depends on –

A) ambient temperature

B) volume of material

C) steinmetz coefficient of material

D) frequency

47 / 100

Category: Magnetic Circuit

47. In a electric circuit MMF is similar to

A) Resistance

B) Electromotive force

C) Flux

D) Current

48 / 100

Category: Magnetic Circuit

48. An open coil has –

A) Infinite resistance and normal inductance

B) Infinite resistance and zero inductance

C) Zero resistance and high inductance

D) Zero resistance and inductance

49 / 100

Category: Circuit Theory & Network

49. For a pure inductive circuit, the average demand of power from the source will be –

A) Maximum

B) a very small amount

C) Zero

D) Minimum

50 / 100

Category: Basic Electricity

50. In case of D.C –

A) Magnitude and direction both change with time

B) Magnitude and direction remains constant

C) Magnitude of current changes with time

D) Direction of current changes with time

51 / 100

Category: AC Fundamental

51. Form factor of half wave rectified ac is-

A) 1.11

B) 1.57

C) 2

D) 1.41

52 / 100

Category: Basic Electricity

52. If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is

A) 1 mA

B) 1.5 mA

C) 15 mA

D) 10 mA

53 / 100

Category: Basic Electricity

53. In a parallel circuit, with a number of resistors, the voltage across each resistor is ________

A) Is divided proportionally across all resistors

B) Is zero for all resistors

C) Is divided equally among all resistors

D) The same for all resistors

54 / 100

Category: Basic Electricity

54. It is preferable to connect bulbs in series or in parallel?

A) Both series and parallel

B) Series

C) Neither series nor parallel

D) Parallel

55 / 100

Category: AC Fundamental

55. If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is –

A) A sinusoid of double the frequency

B) A sinusoid of half the original frequency

C) Not a sinusoid

D) A sinusoid of the same frequency

56 / 100

Category: Basic Electricity

56. For a sinusoidal AC voltage, amplitude factor is –

A) 0.637

B) 1.414

C) 1.11

D) 0.707

57 / 100

Category: AC Fundamental

57. Capacitive Susceptance is a measure of –

A) Reactive power in a circuit

B) A purely capacitive circuit's ability to pass current

C) The extent of neutralization of reactive power in a circuit

D) A purely capacitive circuit's ability to resist the flow of current

58 / 100

Category: Basic Electricity

58. Batteries are generally connected in______

A) Neither series nor parallel

B) Series

C) Parallel

D) Either series or parallel

59 / 100

Category: AC Fundamental

59. From heating point of view I_D.C. is equal to –

A) I average value

B) I R.M.S.

C) I max Lm value

D) None

60 / 100

Category: Magnetic Circuit

60. If the current in a coil having a constant inductance of L henrys grows at a uniform rate, what is the value of the average current?

A) I/4

B) 0

C) I/2

D) I

61 / 100

Category: Magnetic Circuit

61. Calculate the value of stored energy in an inductor if the value of inductance is 20 H and 4 A of current flows through it.

A) 190 J

B) 160 J

C) 150 J

D) 220 J

62 / 100

Category: DC Machines

62. Direction of DC motor can be found out by-

A) Cork Screw Rule

B) Lenz Law

C) Flemmings Left Hand Rule

D) Flemmings Right Hand Rule

63 / 100

Category: Basic Electricity

63. Calculate the resistance between A and B

A) 29.69 ohm

B) 14.26 ohm

C) 7 ohm

D) 3.56 ohm

64 / 100

Category: AC Fundamental

64. For a sinusoidal AC voltage, peak factor or amplitude fator or crest factor is –

A) 0.637

B) 1.414

C) 0.707

D) 1.11

65 / 100

Category: Basic Electricity

65. If a capacitor is connected with DC supply, it will act as –

A) a short circuit

B) open circuit

C) a resistor

D) a normal capacitor as in AC

66 / 100

Category: Basic Electricity

66. Instantaneous power in inductor is proportional to the –

A) Temperature of the inductor

B) Square of rate of change of current

C) Square of instantaneous current

D) Product of instantaneous current & rate of change of current

67 / 100

Category: Basic Electricity

67. Average value of a sine wave is 0.707 times the peak value

A) False

B) True

68 / 100

Category: AC Fundamental

68. An electric incandescent lamp has the power factor of –

A) unity

B) leading

C) zero

D) Lagging

69 / 100

Category: Basic Electricity

69. Color code for 1 ohm +-10% resistor is

A) Black Brown Black Golden

B) Black Brown Black Silver

C) Brown Black Golden Golden

D) Brown Black Golden Silver

70 / 100

Category: Basic Electricity

70. If the current through x ohm resistance in the circuit is 5A, find the value of x

A) 135 ohm

B) 12 ohm

C) 5 ohm

D) 27 ohm

71 / 100

Category: Basic Electricity

71. If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is

A) 18.8 V

B) 4 V

C) 26.6 V

D) 2.66 V

72 / 100

Category: Basic Electricity

72. In a ____________ circuit, the total resistance is smaller than the smallest resistance in the circuit

A) Neither series nor parallel

B) Either series or parallel

C) Series

D) Parallel

73 / 100

Category: Basic Electricity

73. Insulating material can –

A) Store varying voltage

B) protect a open circuit between the voltage source and load

C) Conduct very large current

D) Protect a short circuit between two conductors

74 / 100

Category: Magnetic Circuit

74. Induced potential difference due to motion of magnet with respect to the coil is known as -

A) Electromotive difference

B) Magnetomotive force

C) Electromotive force

D) voltage

75 / 100

Category: Basic Electricity

75. In a _________ circuit, the total resistance is greater than the largest resistance in the circuit.

A) Series

B) Neither series nor parallel

C) Parallel

D) Either series or parallel

76 / 100

Category: AC Fundamental

76. An alternating voltage is given by, V = 10 sin 2πt. The frequency of the AC signal is –

A) 2π Hz

B) π Hz

C) None

D) 1 Hz

77 / 100

Category: Basic Electricity

77. An Inductor works as a ___________ circuit for DC supply.

A) Open

B) Polar

C) Non-polar

D) Short

78 / 100

Category: Circuit Theory & Network

78. In any AC circuit always –

A) Reactive power is more than apparent power

B) Apparent power is more than actual power

C) Reactive power is more than actual power

D) Actual power is more than reactive power

79 / 100

Category: AC Fundamental

79. In an AC circuit a low value of KVAR compared with KW indicates –

A) High power factor

B) Unity power factor

C) Maximum load current

D) Low efficiency

80 / 100

Category: AC Fundamental

80. In an AC circuit (Sine wave) with R and L in series –

A) The voltage across R lags the voltage across L by 90°

B) Voltage across R and L 180o out of face

C) Voltage across R and L are in phase

D) The voltage across R leads the voltage across L by 90°

81 / 100

Category: AC Fundamental

81. In series R-L circuit power factor can be defined as -

A) Active Power (P)/Apparent Power (S)

B) Vr/V

C) All of the above

D) R/Z

82 / 100

Category: Magnetic Circuit

82. M.M.F in a magnetic circuit is corresponding to ……… in an electric circuit-

A) Emf

B) None

C) Voltage drop

D) Current

83 / 100

Category: Basic Electricity

83. Calculate the equivalent resistance between A and B

A) 60 ohm

B) 15 ohm

C) 12 ohm

D) 48 ohm

84 / 100

Category: AC Fundamental

84. For a sinusoidal AC voltage, amplitude factor is –

A) 0.637

B) 1.11

C) 1.414

D) 0.707

85 / 100

Category: Basic Electricity

85. KWh is the unit of -

A) Power

B) Energy

C) Efficiency

D) Work

86 / 100

Category: AC Fundamental

86. Capacitors for power factor correction are rated in -

A) KVA

B) KW

C) VA

D) KVAR

87 / 100

Category: Basic Electricity

87. If the length of a wire is doubled and diameter is halved, then the resistance will become _________ of the previous.

A) 16 times

B) 8 times

C) 4 times

D) 32 times

88 / 100

Category: Basic Electricity

88. Calculate the ratio of the resistivity of 2 wires having the same length and same resistance with area of cross section 2m² and 5m² respectively.

A) 5:7

B) 2:7

C) 2:5

D) 7:5

89 / 100

Category: AC Fundamental

89. In series R-L circuit power factor can be defined as –

A) R/Z

B) Vr /V

C) P/S

D) All of the above

90 / 100

Category: Basic Electricity

90. Find the current in the circuit.

A) 1 A

B) 4 A

C) 3 A

D) 2 A

91 / 100

Category: AC Fundamental

91. Form factor of square wave is-

A) 1

B) 2

C) 1.47

D) 1.41

92 / 100

Category: Basic Electricity

92. How many degrees are there in π/3 rad?

A) 60°

B) 27°

C) 180°

D) 6°

93 / 100

Category: Magnetic Circuit

93. Higher the self-inductance of a coil –

A) lower the E.M.F. induced

B) longer the delay in establishing steady current through it

C) Lesser its Weber-turns

D) Greater the flux produced by it

94 / 100

Category: Basic Electricity

94. If the length of a wire is doubled and diameter is halved, then the resistance will become –

A) 16 times – of the previous

B) 32 times

C) 4 times

D) 8 times

95 / 100

Category: AC Fundamental

95. In a series R-C circuit, the applied voltage –

A) lags the current

B) 90° lags the current

C) 90° leads the current

D) leads the current

96 / 100

Category: Basic Electricity

96. Find the voltage across the 6 ohm resistor

A) 150 V

B) 54.48 V

C) 27.27 V

D) 181.6 V

97 / 100

Category: AC Fundamental

97. In a capacitor, the electrical energy is stored in –

A) both a and b

B) Magnetic field

C) electric field

D) none

98 / 100

Category: Basic Electricity

98. Calculate the equivalent resistance between A and B

A) 26.67 ohm

B) 10.67 ohm

C) 46.67 ohm

D) 6.67 ohm

99 / 100

Category: AC Fundamental

99. For a sinusoidal AC voltage, amplitude factor is –

A) 1.414

B) 0.707

C) 0.637

D) 1.11

100 / 100

Category: Basic Electricity

100. Ideal voltage source has-

A) High internal resistance

B) Zero internal resistance

C) Low internal resistance

D) Infinity internal resistance

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