SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

186

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

A) Unity power factor

B) High power factor

C) Low efficiency

D) Maximum load current

2 / 100

Category: Basic Electricity

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

A) 13 V

B) None of the above

C) 6.5 V

D) 26 V

3 / 100

Category: AC Fundamental

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

A) capacitance is less & supply frequency is more

B) capacitance & supply frequency is more

C) Capacitance is more & supply frequency is less

D) Capacitance & supply frequency is less

4 / 100

Category: AC Fundamental

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

A) L only

B) C only

C) R only

D) All of these

5 / 100

Category: Basic Electricity

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

A) 506.25 W

B) 50625 W

C) 50.625 W

D) 5062.5 W

6 / 100

Category: Basic Electricity

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

A) Multimeter

B) Voltmeter

C) Ammeter

D) Ohmmeter

7 / 100

Category: AC Fundamental

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

A) P/S

B) All of these

C) Vr/V

D) R/Z

8 / 100

Category: Basic Electricity

8. 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) 7:5

B) 2:7

C) 5:7

D) 2:5

9 / 100

Category: AC Fundamental

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

A) 2π Hz

B) π Hz

C) 1 Hz

D) None

10 / 100

Category: Basic Electricity

10. Electrolysis is possible with –

A) A.C supply only

B) D.C supply only

C) both A.C and D.C supply

D) none

11 / 100

Category: Magnetic Circuit

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

A) Electromagnetic fields

B) Electric magnets

C) Electromagnets

D) Electromagnetism field

12 / 100

Category: AC Fundamental

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

A) L only

B) C only

C) R only

D) R-L-C all

13 / 100

Category: Basic Electricity

13. KWh is the unit of -

A) Energy

B) Work

C) Efficiency

D) Power

14 / 100

Category: Basic Electricity

14. Find the current in the circuit.

A) 4 A

B) 1 A

C) 3 A

D) 2 A

15 / 100

Category: AC Fundamental

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

A) Voltage across R and L are in phase

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

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

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

16 / 100

Category: Basic Electricity

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

A) 0.707

B) 0.637

C) 1.414

D) 1.11

17 / 100

Category: Circuit Theory & Network

17. 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) Zero

C) Leading

D) Unity

18 / 100

Category: AC Fundamental

18. Form factor of half wave rectified ac is-

A) 1.11

B) 2

C) 1.41

D) 1.57

19 / 100

Category: Basic Electricity

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

A) 27 ohm

B) 135 ohm

C) 5 ohm

D) 12 ohm

20 / 100

Category: Basic Electricity

20. Electric pressure is also called –

A) Conductance

B) Resistance

C) Voltage

D) Energy

21 / 100

Category: Magnetic Circuit

21. Hysteresis loss least depends on –

A) frequency

B) steinmetz coefficient of material

C) ambient temperature

D) volume of material

22 / 100

Category: AC Fundamental

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

A) electric field

B) both a and b

C) none

D) Magnetic field

23 / 100

Category: AC Fundamental

23. 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

24 / 100

Category: Magnetic Circuit

24. 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) 15 J

B) 60 J

C) 90 J

D) 20 J

25 / 100

Category: AC Fundamental

25. 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) 2 ohm

C) 10 ohm

D) 14 ohm

26 / 100

Category: Basic Electricity

26. Calculate the total current in the circuit

A) 15 A

B) 11.43 A

C) 20 A

D) 10 A

27 / 100

Category: Basic Electricity

27. Calculate the equivalent resistance between A and B

A) 12 ohm

B) 48 ohm

C) 15 ohm

D) 60 ohm

28 / 100

Category: Basic Electricity

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

A) The other bulb glows with increased brightness

B) The other bulb stops glowing

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

D) The other bulb blows out as well

29 / 100

Category: Basic Electricity

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

A) True

B) False

30 / 100

Category: AC Fundamental

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

A) Not a sinusoid

B) A sinusoid of half the original frequency

C) A sinusoid of the same frequency

D) A sinusoid of double the frequency

31 / 100

Category: Circuit Theory & Network

31. In any AC circuit always –

A) Apparent power is more than actual power

B) Actual power is more than reactive power

C) Reactive power is more than actual power

D) Reactive power is more than apparent power

32 / 100

Category: Basic Electricity

32. 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) 2 kWh

B) 4 kWh

C) 5 kWh

D) 1 kWh

33 / 100

Category: Basic Electricity

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

A) open circuit

B) a short circuit

C) a normal capacitor as in AC

D) a resistor

34 / 100

Category: Magnetic Circuit

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

A) its high retentivity

B) rapid reversals of its magnetisation

C) flux density lagging behind magnetising force

D) molecular friction

35 / 100

Category: AC Fundamental

35. Capacitors for power factor correction are rated in -

A) KVAR

B) VA

C) KVA

D) KW

36 / 100

Category: Basic Electricity

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

A) 100 μs

B) 2 μs

C) 20 μs

D) 4 μs

37 / 100

Category: Magnetic Circuit

37. 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

38 / 100

Category: DC Machines

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

A) Flemmings Left Hand Rule

B) Flemmings Right Hand Rule

C) Cork Screw Rule

D) Lenz Law

39 / 100

Category: AC Fundamental

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

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

B) All of the above

C) R/Z

D) Vr/V

40 / 100

Category: AC Fundamental

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

A) R only

B) R-L-C all

C) C only

D) L only

41 / 100

Category: Basic Electricity

41. In a pure inductive circuit current is

A) Leads by voltage by 0°

B) Lags by voltage by 0°

C) Leads by voltage by 90°

D) Lags behind Voltage by 90°

42 / 100

Category: AC Fundamental

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

A) leads the current

B) 90° lags the current

C) 90° leads the current

D) lags the current

43 / 100

Category: Magnetic Circuit

43. An open coil has –

A) Infinite resistance and zero inductance

B) Zero resistance and inductance

C) Zero resistance and high inductance

D) Infinite resistance and normal inductance

44 / 100

Category: Basic Electricity

44. Calculate the equivalent resistance between A and B

A) 2 ohm

B) 4 ohm

C) 6 ohm

D) 8 ohm

45 / 100

Category: Basic Electricity

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

A) 0.48 ohm

B) 7.67 ohm

C) 7 ohm

D) 0 ohm

46 / 100

Category: Basic Electricity

46. Ideal voltage source has-

A) High internal resistance

B) Low internal resistance

C) Zero internal resistance

D) Infinity internal resistance

47 / 100

Category: AC Fundamental

47. 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 lags the voltage across L by 90°

C) Voltage across R and L are in phase

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

48 / 100

Category: Basic Electricity

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

A) 2.66 V

B) 26.6 V

C) 4 V

D) 18.8 V

49 / 100

Category: Circuit Theory & Network

49. Battery is a

A) AC Sorce

B) None of the above

C) Both of the above

D) DC Source

50 / 100

Category: Basic Electricity

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

A) 6°

B) 180°

C) 60°

D) 27°

51 / 100

Category: Magnetic Circuit

51. Higher the self-inductance of a coil –

A) lower the E.M.F. induced

B) Lesser its Weber-turns

C) Greater the flux produced by it

D) longer the delay in establishing steady current through it

52 / 100

Category: AC Fundamental

52. Capacitive Susceptance is a measure of –

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

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

C) Reactive power in a circuit

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

53 / 100

Category: AC Fundamental

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

A) 1.414

B) 1.11

C) 0.637

D) 0.707

54 / 100

Category: AC Fundamental

54. Form factor of square wave is-

A) 1

B) 1.41

C) 1.47

D) 2

55 / 100

Category: AC Fundamental

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

A) P/S

B) R/Z

C) Vr /V

D) All of the above

56 / 100

Category: Basic Electricity

56. Calculate the resistance between A and B

A) 29.69 ohm

B) 3.56 ohm

C) 14.26 ohm

D) 7 ohm

57 / 100

Category: Basic Electricity

57. Batteries are generally connected in______

A) Series

B) Neither series nor parallel

C) Parallel

D) Either series or parallel

58 / 100

Category: Magnetic Circuit

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

A) Aid the increasing current

B) Aid the applied voltage

C) Produce current opposite to the increasing current

D) Tend to decrease the amount of current

59 / 100

Category: AC Fundamental

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

A) 1.414

B) 0.707

C) 1.11

D) 0.637

60 / 100

Category: Basic Electricity

60. Frequency of Direct Current is

A) 0 Hz

B) 50 kHz

C) 50 Hz

D) 40 Hz

61 / 100

Category: Basic Electricity

61. Instantaneous power in inductor is proportional to the –

A) Square of rate of change of current

B) Temperature of the inductor

C) Square of instantaneous current

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

62 / 100

Category: Basic Electricity

62. Find the voltage across the 6 ohm resistor

A) 54.48 V

B) 150 V

C) 181.6 V

D) 27.27 V

63 / 100

Category: AC Machines & Transformer

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

A) Generator

B) Motor

C) Transformer

D) Battery

64 / 100

Category: Basic Electricity

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

A) Short

B) Open

C) Non-polar

D) Polar

65 / 100

Category: Basic Electricity

65. Insulating material can –

A) Store varying voltage

B) Protect a short circuit between two conductors

C) Conduct very large current

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

66 / 100

Category: Magnetic Circuit

66. 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) doubled

C) Unaffected

D) halved

67 / 100

Category: Magnetic Circuit

67. 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) Increase

B) Remain the same

C) decrease

D) initially increase and then decrease

68 / 100

Category: Circuit Theory & Network

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

A) Zero

B) a very small amount

C) Maximum

D) Minimum

69 / 100

Category: Magnetic Circuit

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

A) Electromotive difference

B) Electromotive force

C) Magnetomotive force

D) voltage

70 / 100

Category: Basic Electricity

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

A) 16 times – of the previous

B) 4 times

C) 32 times

D) 8 times

71 / 100

Category: AC Fundamental

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

A) 1.414

B) 1.11

C) 0.637

D) 0.707

72 / 100

Category: Basic Electricity

72. Ideal voltage source has-

A) Zero internal resistance

B) Low internal resistance

C) High internal resistance

D) Infinity internal resistance

73 / 100

Category: Basic Electricity

73. 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) 32 times

D) 4 times

74 / 100

Category: Basic Electricity

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

A) The other bulb also burns out

B) The other bulb glows with increased brightness

C) The other bulb stops glowing

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

75 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Parallel

C) Either series or parallel

D) Series

76 / 100

Category: Transformer

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

A) 125 A, 5 A

B) 30 A, 50 A

C) 5 A, 125 A

D) 100 A, 25A

77 / 100

Category: Basic Electricity

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

A) Series

B) Either series or parallel

C) Parallel

D) Neither series nor parallel

78 / 100

Category: Basic Electricity

78. In case of D.C –

A) Direction of current changes with time

B) Magnitude and direction both change with time

C) Magnitude and direction remains constant

D) Magnitude of current changes with time

79 / 100

Category: Basic Electricity

79. Calculate the current across the 20 ohm resistor

A) 36.67 A

B) 6.67 A

C) 10 A

D) 20 A

80 / 100

Category: Basic Electricity

80. Calculate the equivalent resistance between A and B

A) 46.67 ohm

B) 26.67 ohm

C) 10.67 ohm

D) 6.67 ohm

81 / 100

Category: Magnetic Circuit

81. 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) 160 J

B) 150 J

C) 190 J

D) 220 J

82 / 100

Category: Basic Electricity

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

A) -1

B) 1

C) Infinity

D) 0

83 / 100

Category: AC Fundamental

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

A) zero

B) unity

C) Lagging

D) leading

84 / 100

Category: Basic Electricity

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

A) Is divided equally among all resistors

B) The same for all resistors

C) Is zero for all resistors

D) Is divided proportionally across all resistors

85 / 100

Category: AC Fundamental

85. Average power taken by a pure capacitor is –

A) Minimum

B) Zero

C) Unity

D) Maximum

86 / 100

Category: Basic Electricity

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

A) Brown Black Golden Golden

B) Black Brown Black Silver

C) Brown Black Golden Silver

D) Black Brown Black Golden

87 / 100

Category: Magnetic Circuit

87. 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

B) I/2

C) I/4

D) 0

88 / 100

Category: Magnetic Circuit

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

A) 3.5 V

B) 1.5 V

C) 5 V

D) 2.5 V

89 / 100

Category: Circuit Theory & Network

89. 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

90 / 100

Category: Magnetic Circuit

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

A) LI^2 / 2

B) LI^2

C) IL^2

D) L^2 I / 2

91 / 100

Category: Basic Electricity

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

A) 90 J

B) 20 J

C) 60 J

D) 15 J

92 / 100

Category: Basic Electricity

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

A) Neither voltage nor current

B) Both voltage and current

C) Current

D) Voltage

93 / 100

Category: AC Fundamental

93. 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

94 / 100

Category: Basic Electricity

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

A) Both series and parallel

B) Series

C) Parallel

D) Neither series nor parallel

95 / 100

Category: Magnetic Circuit

95. In a electric circuit MMF is similar to

A) Current

B) Resistance

C) Flux

D) Electromotive force

96 / 100

Category: AC Fundamental

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

A) I R.M.S.

B) I max Lm value

C) I average value

D) None

97 / 100

Category: Basic Electricity

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

A) 15 mA

B) 1.5 mA

C) 1 mA

D) 10 mA

98 / 100

Category: Magnetic Circuit

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

A) Voltage drop

B) Emf

C) Current

D) None

99 / 100

Category: Basic Electricity

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

A) Open circuit

B) A resistor

C) A short circuit

D) A normal capacitor as in AC

100 / 100

Category: AC Fundamental

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

A) Voltage

B) Heating effect

C) Current

D) Charge transfer

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