SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

248

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: Basic Electricity

1. 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) 4 kWh

D) 1 kWh

2 / 100

Category: Basic Electricity

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

A) Parallel

B) Series

C) Neither series nor parallel

D) Either series or parallel

3 / 100

Category: Basic Electricity

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

A) Multimeter

B) Voltmeter

C) Ohmmeter

D) Ammeter

4 / 100

Category: Circuit Theory & Network

4. In any AC circuit always –

A) Reactive power is more than actual power

B) Reactive power is more than apparent power

C) Apparent power is more than actual power

D) Actual power is more than reactive power

5 / 100

Category: Basic Electricity

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

A) 0.707

B) 0.637

C) 1.414

D) 1.11

6 / 100

Category: AC Fundamental

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

A) 0.637

B) 1.11

C) 1.414

D) 0.707

7 / 100

Category: Basic Electricity

7. 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) 5:7

C) 2:7

D) 2:5

8 / 100

Category: AC Fundamental

8. Capacitive Susceptance is a measure of –

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

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

C) Reactive power in a circuit

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

9 / 100

Category: Basic Electricity

9. 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) 60 J

C) 20 J

D) 15 J

10 / 100

Category: Basic Electricity

10. Frequency of Direct Current is

A) 0 Hz

B) 50 kHz

C) 50 Hz

D) 40 Hz

11 / 100

Category: AC Fundamental

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

A) lags the current

B) 90° lags the current

C) leads the current

D) 90° leads the current

12 / 100

Category: Basic Electricity

12. 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

13 / 100

Category: AC Fundamental

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

A) Magnetic field

B) none

C) electric field

D) both a and b

14 / 100

Category: AC Fundamental

14. Form factor of square wave is-

A) 1

B) 2

C) 1.41

D) 1.47

15 / 100

Category: AC Fundamental

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

A) All of these

B) Vr/V

C) R/Z

D) P/S

16 / 100

Category: AC Fundamental

16. Average power taken by a pure capacitor is –

A) Minimum

B) Zero

C) Maximum

D) Unity

17 / 100

Category: Basic Electricity

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

A) 100 μs

B) 2 μs

C) 4 μs

D) 20 μs

18 / 100

Category: Magnetic Circuit

18. Higher the self-inductance of a coil –

A) Lesser its Weber-turns

B) longer the delay in establishing steady current through it

C) Greater the flux produced by it

D) lower the E.M.F. induced

19 / 100

Category: Basic Electricity

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

A) 0

B) -1

C) Infinity

D) 1

20 / 100

Category: Basic Electricity

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

A) Open circuit

B) A resistor

C) A normal capacitor as in AC

D) A short circuit

21 / 100

Category: Magnetic Circuit

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

A) Electromagnetism field

B) Electromagnets

C) Electromagnetic fields

D) Electric magnets

22 / 100

Category: Basic Electricity

22. Calculate the equivalent resistance between A and B

A) 6.67 ohm

B) 26.67 ohm

C) 46.67 ohm

D) 10.67 ohm

23 / 100

Category: Basic Electricity

23. KWh is the unit of -

A) Work

B) Energy

C) Efficiency

D) Power

24 / 100

Category: Basic Electricity

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

A) Short

B) Non-polar

C) Open

D) Polar

25 / 100

Category: Basic Electricity

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

A) Parallel

B) Either series or parallel

C) Neither series nor parallel

D) Series

26 / 100

Category: Basic Electricity

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

A) Parallel

B) Both series and parallel

C) Series

D) Neither series nor parallel

27 / 100

Category: Basic Electricity

27. Instantaneous power in inductor is proportional to the –

A) Square of rate of change of current

B) Temperature of the inductor

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

D) Square of instantaneous current

28 / 100

Category: AC Fundamental

28. Capacitors for power factor correction are rated in -

A) KVAR

B) KVA

C) VA

D) KW

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: Magnetic Circuit

30. 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

31 / 100

Category: Magnetic Circuit

31. An open coil has –

A) Infinite resistance and zero inductance

B) Infinite resistance and normal inductance

C) Zero resistance and high inductance

D) Zero resistance and inductance

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 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 blows out as well

33 / 100

Category: Magnetic Circuit

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

A) Electromotive force

B) Magnetomotive force

C) Electromotive difference

D) voltage

34 / 100

Category: AC Fundamental

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

A) leads the current

B) lags the current

C) 90° lags the current

D) 90° leads the current

35 / 100

Category: AC Fundamental

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

A) 1.11

B) 0.637

C) 0.707

D) 1.414

36 / 100

Category: AC Fundamental

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

A) C only

B) R only

C) R-L-C all

D) L only

37 / 100

Category: Basic Electricity

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

A) a short circuit

B) a resistor

C) a normal capacitor as in AC

D) open circuit

38 / 100

Category: Magnetic Circuit

38. 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) 0

C) I/4

D) I

39 / 100

Category: Basic Electricity

39. Ideal voltage source has-

A) Low internal resistance

B) Infinity internal resistance

C) Zero internal resistance

D) High internal resistance

40 / 100

Category: AC Fundamental

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

A) Vr /V

B) P/S

C) All of the above

D) R/Z

41 / 100

Category: AC Fundamental

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

A) Low efficiency

B) Maximum load current

C) Unity power factor

D) High power factor

42 / 100

Category: AC Fundamental

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

A) A sinusoid of half the original frequency

B) A sinusoid of double the frequency

C) Not a sinusoid

D) A sinusoid of the same frequency

43 / 100

Category: Basic Electricity

43. Calculate the total current in the circuit

A) 10 A

B) 15 A

C) 11.43 A

D) 20 A

44 / 100

Category: AC Machines & Transformer

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

A) Motor

B) Generator

C) Battery

D) Transformer

45 / 100

Category: AC Fundamental

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

A) L only

B) All of these

C) R only

D) C only

46 / 100

Category: AC Fundamental

46. 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) The voltage across R lags the voltage across L by 90°

D) Voltage across R and L are in phase

47 / 100

Category: Basic Electricity

47. In case of D.C –

A) Direction of current changes with time

B) Magnitude and direction remains constant

C) Magnitude of current changes with time

D) Magnitude and direction both change with time

48 / 100

Category: Magnetic Circuit

48. Hysteresis loss least depends on –

A) steinmetz coefficient of material

B) volume of material

C) ambient temperature

D) frequency

49 / 100

Category: Basic Electricity

49. Electrolysis is possible with –

A) A.C supply only

B) none

C) both A.C and D.C supply

D) D.C supply only

50 / 100

Category: DC Machines

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

A) Flemmings Right Hand Rule

B) Cork Screw Rule

C) Flemmings Left Hand Rule

D) Lenz Law

51 / 100

Category: AC Fundamental

51. 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

52 / 100

Category: Magnetic Circuit

52. 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) 20 J

D) 60 J

53 / 100

Category: Basic Electricity

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

A) 12 ohm

B) 27 ohm

C) 5 ohm

D) 135 ohm

54 / 100

Category: Circuit Theory & Network

54. 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) Unity

D) Leading

55 / 100

Category: Basic Electricity

55. Calculate the equivalent resistance between A and B

A) 15 ohm

B) 48 ohm

C) 12 ohm

D) 60 ohm

56 / 100

Category: Transformer

56. 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) 100 A, 25A

D) 125 A, 5 A

57 / 100

Category: Basic Electricity

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

A) 4 V

B) 18.8 V

C) 26.6 V

D) 2.66 V

58 / 100

Category: Basic Electricity

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

A) 7 ohm

B) 0.48 ohm

C) 7.67 ohm

D) 0 ohm

59 / 100

Category: AC Fundamental

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

A) 1 Hz

B) None

C) 2π Hz

D) π Hz

60 / 100

Category: Basic Electricity

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

A) 8 times

B) 4 times

C) 16 times

D) 32 times

61 / 100

Category: AC Fundamental

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

A) I average value

B) None

C) I max Lm value

D) I R.M.S.

62 / 100

Category: Basic Electricity

62. Electric pressure is also called –

A) Energy

B) Voltage

C) Resistance

D) Conductance

63 / 100

Category: Basic Electricity

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

A) 6°

B) 27°

C) 180°

D) 60°

64 / 100

Category: Magnetic Circuit

64. 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

65 / 100

Category: AC Fundamental

65. 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

66 / 100

Category: Basic Electricity

66. Calculate the equivalent resistance between A and B

A) 6 ohm

B) 2 ohm

C) 4 ohm

D) 8 ohm

67 / 100

Category: Magnetic Circuit

67. 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) 190 J

C) 150 J

D) 220 J

68 / 100

Category: Magnetic Circuit

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

A) Tend to decrease the amount of current

B) Aid the applied voltage

C) Aid the increasing current

D) Produce current opposite to the increasing current

69 / 100

Category: Basic Electricity

69. Insulating material can –

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

B) Conduct very large current

C) Store varying voltage

D) Protect a short circuit between two conductors

70 / 100

Category: Basic Electricity

70. Calculate the resistance between A and B

A) 3.56 ohm

B) 14.26 ohm

C) 7 ohm

D) 29.69 ohm

71 / 100

Category: Magnetic Circuit

71. 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) Increase

C) decrease

D) initially increase and then decrease

72 / 100

Category: AC Fundamental

72. Form factor of half wave rectified ac is-

A) 1.41

B) 2

C) 1.11

D) 1.57

73 / 100

Category: Basic Electricity

73. Ideal voltage source has-

A) Zero internal resistance

B) Infinity internal resistance

C) High internal resistance

D) Low internal resistance

74 / 100

Category: AC Fundamental

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

A) Capacitance & supply frequency is less

B) capacitance is less & supply frequency is more

C) capacitance & supply frequency is more

D) Capacitance is more & supply frequency is less

75 / 100

Category: Basic Electricity

75. Batteries are generally connected in______

A) Either series or parallel

B) Neither series nor parallel

C) Series

D) Parallel

76 / 100

Category: Magnetic Circuit

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

A) its high retentivity

B) rapid reversals of its magnetisation

C) molecular friction

D) flux density lagging behind magnetising force

77 / 100

Category: Magnetic Circuit

77. 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) 5 V

C) 2.5 V

D) 3.5 V

78 / 100

Category: Basic Electricity

78. 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°

79 / 100

Category: Circuit Theory & Network

79. 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

80 / 100

Category: Basic Electricity

80. Calculate the current across the 20 ohm resistor

A) 36.67 A

B) 10 A

C) 20 A

D) 6.67 A

81 / 100

Category: Circuit Theory & Network

81. Battery is a

A) AC Sorce

B) Both of the above

C) DC Source

D) None of the above

82 / 100

Category: Basic Electricity

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

A) Black Brown Black Golden

B) Black Brown Black Silver

C) Brown Black Golden Silver

D) Brown Black Golden Golden

83 / 100

Category: Magnetic Circuit

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

A) Emf

B) Current

C) None

D) Voltage drop

84 / 100

Category: Basic Electricity

84. Find the voltage across the 6 ohm resistor

A) 27.27 V

B) 181.6 V

C) 54.48 V

D) 150 V

85 / 100

Category: Basic Electricity

85. 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) 8 times

D) 32 times

86 / 100

Category: Magnetic Circuit

86. In a electric circuit MMF is similar to

A) Current

B) Resistance

C) Flux

D) Electromotive force

87 / 100

Category: AC Fundamental

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

A) 0.637

B) 0.707

C) 1.414

D) 1.11

88 / 100

Category: AC Fundamental

88. 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) 14 ohm

C) 2 ohm

D) 10 ohm

89 / 100

Category: AC Fundamental

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

A) C only

B) L only

C) R only

D) R-L-C all

90 / 100

Category: Basic Electricity

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

A) The same for all resistors

B) Is divided equally among all resistors

C) Is zero for all resistors

D) Is divided proportionally across all resistors

91 / 100

Category: Basic Electricity

91. 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) 1 mA

D) 10 mA

92 / 100

Category: Circuit Theory & Network

92. 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) Lagging

C) Unity

D) Leading

93 / 100

Category: Basic Electricity

93. 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) 50.625 W

C) 5062.5 W

D) 50625 W

94 / 100

Category: AC Fundamental

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

A) Current

B) Heating effect

C) Charge transfer

D) Voltage

95 / 100

Category: Basic Electricity

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

A) Both voltage and current

B) Neither voltage nor current

C) Voltage

D) Current

96 / 100

Category: AC Fundamental

96. 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°

97 / 100

Category: AC Fundamental

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

A) Lagging

B) zero

C) leading

D) unity

98 / 100

Category: Basic Electricity

98. 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 continues to glow with the same brightness

C) The other bulb stops glowing

D) The other bulb glows with increased brightness

99 / 100

Category: Basic Electricity

99. Find the current in the circuit.

A) 2 A

B) 1 A

C) 3 A

D) 4 A

100 / 100

Category: Magnetic Circuit

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

A) LI^2 / 2

B) L^2 I / 2

C) IL^2

D) LI^2

Your score is

The average score is 23%

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