SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

193

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 a capacitor, the electrical energy is stored in –

A) electric field

B) both a and b

C) Magnetic field

D) none

2 / 100

Category: AC Fundamental

2. Capacitors for power factor correction are rated in -

A) VA

B) KW

C) KVA

D) KVAR

3 / 100

Category: Basic Electricity

3. 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

4 / 100

Category: Magnetic Circuit

4. An open coil has –

A) Infinite resistance and normal inductance

B) Zero resistance and high inductance

C) Infinite resistance and zero inductance

D) Zero resistance and inductance

5 / 100

Category: AC Fundamental

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

A) 1 Hz

B) 2π Hz

C) None

D) π Hz

6 / 100

Category: AC Fundamental

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

A) 90° leads the current

B) lags the current

C) 90° lags the current

D) leads the current

7 / 100

Category: Basic Electricity

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

A) a normal capacitor as in AC

B) open circuit

C) a resistor

D) a short circuit

8 / 100

Category: Basic Electricity

8. 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) 5062.5 W

C) 506.25 W

D) 50.625 W

9 / 100

Category: Basic Electricity

9. 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) 26.6 V

C) 4 V

D) 2.66 V

10 / 100

Category: AC Fundamental

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

A) Voltage across R and L are in phase

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

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

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

11 / 100

Category: Basic Electricity

11. In a pure inductive circuit current is

A) Lags behind Voltage by 90°

B) Leads by voltage by 90°

C) Leads by voltage by 0°

D) Lags by voltage by 0°

12 / 100

Category: Basic Electricity

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

A) Open circuit

B) A normal capacitor as in AC

C) A short circuit

D) A resistor

13 / 100

Category: AC Fundamental

13. 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) 2 ohm

D) 14 ohm

14 / 100

Category: Magnetic Circuit

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

A) voltage

B) Electromotive force

C) Magnetomotive force

D) Electromotive difference

15 / 100

Category: Transformer

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

A) 5 A, 125 A

B) 30 A, 50 A

C) 125 A, 5 A

D) 100 A, 25A

16 / 100

Category: AC Fundamental

16. 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

17 / 100

Category: AC Fundamental

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

A) Vr/V

B) All of these

C) R/Z

D) P/S

18 / 100

Category: Basic Electricity

18. Electrolysis is possible with –

A) A.C supply only

B) both A.C and D.C supply

C) D.C supply only

D) none

19 / 100

Category: AC Fundamental

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

A) R/Z

B) P/S

C) Vr /V

D) All of the above

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) Zero

B) Unity

C) Lagging

D) Leading

21 / 100

Category: AC Fundamental

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

A) None

B) I average value

C) I R.M.S.

D) I max Lm value

22 / 100

Category: Basic Electricity

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

A) None of the above

B) 26 V

C) 13 V

D) 6.5 V

23 / 100

Category: AC Fundamental

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

A) capacitance & supply frequency is more

B) capacitance is less & supply frequency is more

C) Capacitance is more & supply frequency is less

D) Capacitance & supply frequency is less

24 / 100

Category: Basic Electricity

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

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

B) The other bulb stops glowing

C) The other bulb glows with increased brightness

D) The other bulb blows out as well

25 / 100

Category: Basic Electricity

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

A) Ammeter

B) Multimeter

C) Ohmmeter

D) Voltmeter

26 / 100

Category: Basic Electricity

26. Ideal voltage source has-

A) Low internal resistance

B) High internal resistance

C) Infinity internal resistance

D) Zero internal resistance

27 / 100

Category: AC Fundamental

27. Average power taken by a pure capacitor is –

A) Unity

B) Minimum

C) Maximum

D) Zero

28 / 100

Category: Magnetic Circuit

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

A) its high retentivity

B) molecular friction

C) flux density lagging behind magnetising force

D) rapid reversals of its magnetisation

29 / 100

Category: Circuit Theory & Network

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

A) Leading

B) Zero

C) Unity

D) Lagging

30 / 100

Category: Magnetic Circuit

30. Higher the self-inductance of a coil –

A) longer the delay in establishing steady current through it

B) lower the E.M.F. induced

C) Greater the flux produced by it

D) Lesser its Weber-turns

31 / 100

Category: Magnetic Circuit

31. 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) 90 J

C) 60 J

D) 20 J

32 / 100

Category: Basic Electricity

32. Calculate the current across the 20 ohm resistor

A) 36.67 A

B) 6.67 A

C) 20 A

D) 10 A

33 / 100

Category: Basic Electricity

33. 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

34 / 100

Category: AC Fundamental

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

A) L only

B) R-L-C all

C) R only

D) C only

35 / 100

Category: AC Fundamental

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

A) 0.707

B) 1.11

C) 0.637

D) 1.414

36 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Parallel

C) Series

D) Either series or parallel

37 / 100

Category: AC Fundamental

37. Form factor of square wave is-

A) 1

B) 1.41

C) 2

D) 1.47

38 / 100

Category: Magnetic Circuit

38. Hysteresis loss least depends on –

A) steinmetz coefficient of material

B) volume of material

C) ambient temperature

D) frequency

39 / 100

Category: Basic Electricity

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

A) 1.5 mA

B) 15 mA

C) 10 mA

D) 1 mA

40 / 100

Category: Basic Electricity

40. Frequency of Direct Current is

A) 40 Hz

B) 50 kHz

C) 0 Hz

D) 50 Hz

41 / 100

Category: AC Fundamental

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

A) All of the above

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

C) R/Z

D) Vr/V

42 / 100

Category: Basic Electricity

42. Calculate the equivalent resistance between A and B

A) 48 ohm

B) 12 ohm

C) 60 ohm

D) 15 ohm

43 / 100

Category: Magnetic Circuit

43. 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) 150 J

B) 160 J

C) 190 J

D) 220 J

44 / 100

Category: Magnetic Circuit

44. 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

45 / 100

Category: Magnetic Circuit

45. 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) Remain the same

B) initially increase and then decrease

C) decrease

D) Increase

46 / 100

Category: AC Fundamental

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

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

B) Voltage across R and L are in phase

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

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

47 / 100

Category: Circuit Theory & Network

47. In any AC circuit always –

A) Reactive power is more than apparent power

B) Reactive power is more than actual power

C) Apparent power is more than actual power

D) Actual power is more than reactive power

48 / 100

Category: Basic Electricity

48. 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) 5 kWh

C) 1 kWh

D) 4 kWh

49 / 100

Category: Basic Electricity

49. Calculate the total current in the circuit

A) 20 A

B) 11.43 A

C) 10 A

D) 15 A

50 / 100

Category: AC Fundamental

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

A) Maximum load current

B) High power factor

C) Unity power factor

D) Low efficiency

51 / 100

Category: AC Fundamental

51. Form factor of half wave rectified ac is-

A) 2

B) 1.41

C) 1.57

D) 1.11

52 / 100

Category: Basic Electricity

52. KWh is the unit of -

A) Efficiency

B) Power

C) Work

D) Energy

53 / 100

Category: AC Fundamental

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

A) A sinusoid of the same frequency

B) A sinusoid of double the frequency

C) Not a sinusoid

D) A sinusoid of half the original frequency

54 / 100

Category: Magnetic Circuit

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

A) Emf

B) Voltage drop

C) None

D) Current

55 / 100

Category: Basic Electricity

55. Insulating material can –

A) Conduct very large current

B) Protect a short circuit between two conductors

C) Store varying voltage

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

56 / 100

Category: Magnetic Circuit

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

A) Aid the applied voltage

B) Aid the increasing current

C) Produce current opposite to the increasing current

D) Tend to decrease the amount of current

57 / 100

Category: AC Fundamental

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

A) R only

B) L only

C) R-L-C all

D) C only

58 / 100

Category: Basic Electricity

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

A) 0 ohm

B) 7 ohm

C) 0.48 ohm

D) 7.67 ohm

59 / 100

Category: Magnetic Circuit

59. 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) 0

B) I/4

C) I/2

D) I

60 / 100

Category: AC Fundamental

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

A) 0.637

B) 1.11

C) 0.707

D) 1.414

61 / 100

Category: Magnetic Circuit

61. 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) 5 V

C) 2.5 V

D) 1.5 V

62 / 100

Category: Basic Electricity

62. 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) 2:7

B) 5:7

C) 2:5

D) 7:5

63 / 100

Category: Basic Electricity

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

A) Infinity

B) 1

C) 0

D) -1

64 / 100

Category: Basic Electricity

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

A) Parallel

B) Neither series nor parallel

C) Both series and parallel

D) Series

65 / 100

Category: Basic Electricity

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

A) 60°

B) 6°

C) 27°

D) 180°

66 / 100

Category: Basic Electricity

66. In case of D.C –

A) Magnitude and direction remains constant

B) Magnitude and direction both change with time

C) Direction of current changes with time

D) Magnitude of current changes with time

67 / 100

Category: Basic Electricity

67. 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

68 / 100

Category: Basic Electricity

68. Batteries are generally connected in______

A) Parallel

B) Either series or parallel

C) Series

D) Neither series nor parallel

69 / 100

Category: Basic Electricity

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

A) 32 times

B) 16 times – of the previous

C) 4 times

D) 8 times

70 / 100

Category: AC Fundamental

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

A) 90° leads the current

B) 90° lags the current

C) lags the current

D) leads the current

71 / 100

Category: Basic Electricity

71. Calculate the equivalent resistance between A and B

A) 6.67 ohm

B) 10.67 ohm

C) 46.67 ohm

D) 26.67 ohm

72 / 100

Category: Circuit Theory & Network

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

A) Minimum

B) Maximum

C) a very small amount

D) Zero

73 / 100

Category: Basic Electricity

73. Calculate the resistance between A and B

A) 14.26 ohm

B) 29.69 ohm

C) 3.56 ohm

D) 7 ohm

74 / 100

Category: Magnetic Circuit

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

A) Electromagnetism field

B) Electromagnets

C) Electromagnetic fields

D) Electric magnets

75 / 100

Category: Magnetic Circuit

75. In a electric circuit MMF is similar to

A) Electromotive force

B) Resistance

C) Flux

D) Current

76 / 100

Category: Basic Electricity

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

A) False

B) True

77 / 100

Category: Basic Electricity

77. Find the voltage across the 6 ohm resistor

A) 27.27 V

B) 54.48 V

C) 150 V

D) 181.6 V

78 / 100

Category: AC Fundamental

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

A) Voltage

B) Heating effect

C) Charge transfer

D) Current

79 / 100

Category: Basic Electricity

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

A) Black Brown Black Golden

B) Brown Black Golden Silver

C) Black Brown Black Silver

D) Brown Black Golden Golden

80 / 100

Category: Basic Electricity

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

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

B) The other bulb glows with increased brightness

C) The other bulb also burns out

D) The other bulb stops glowing

81 / 100

Category: AC Machines & Transformer

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

A) Generator

B) Transformer

C) Motor

D) Battery

82 / 100

Category: DC Machines

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

A) Flemmings Left Hand Rule

B) Cork Screw Rule

C) Lenz Law

D) Flemmings Right Hand Rule

83 / 100

Category: Magnetic Circuit

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

A) LI^2

B) LI^2 / 2

C) L^2 I / 2

D) IL^2

84 / 100

Category: Basic Electricity

84. Instantaneous power in inductor is proportional to the –

A) Square of instantaneous current

B) Temperature of the inductor

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

D) Square of rate of change of current

85 / 100

Category: Basic Electricity

85. Calculate the equivalent resistance between A and B

A) 4 ohm

B) 2 ohm

C) 8 ohm

D) 6 ohm

86 / 100

Category: AC Fundamental

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

A) L only

B) All of these

C) C only

D) R only

87 / 100

Category: AC Fundamental

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

A) zero

B) Lagging

C) unity

D) leading

88 / 100

Category: Basic Electricity

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

A) Series

B) Parallel

C) Neither series nor parallel

D) Either series or parallel

89 / 100

Category: Basic Electricity

89. Ideal voltage source has-

A) Low internal resistance

B) Infinity internal resistance

C) High internal resistance

D) Zero internal resistance

90 / 100

Category: Circuit Theory & Network

90. Battery is a

A) AC Sorce

B) DC Source

C) Both of the above

D) None of the above

91 / 100

Category: Basic Electricity

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

A) Polar

B) Open

C) Non-polar

D) Short

92 / 100

Category: Magnetic Circuit

92. 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) halved

D) Unaffected

93 / 100

Category: Basic Electricity

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

A) 1.414

B) 0.637

C) 0.707

D) 1.11

94 / 100

Category: AC Fundamental

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

A) Vr /V

B) All of the above

C) R/Z

D) P/S

95 / 100

Category: Basic Electricity

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

A) 15 J

B) 60 J

C) 90 J

D) 20 J

96 / 100

Category: Basic Electricity

96. Find the current in the circuit.

A) 4 A

B) 2 A

C) 3 A

D) 1 A

97 / 100

Category: Basic Electricity

97. Electric pressure is also called –

A) Resistance

B) Conductance

C) Energy

D) Voltage

98 / 100

Category: Basic Electricity

98. 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

99 / 100

Category: AC Fundamental

99. Capacitive Susceptance is a measure of –

A) Reactive power in a circuit

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

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

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

100 / 100

Category: Basic Electricity

100. 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

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The average score is 22%

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