SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

257

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) 4 kWh

B) 1 kWh

C) 2 kWh

D) 5 kWh

2 / 100

Category: Magnetic Circuit

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

A) flux density lagging behind magnetising force

B) rapid reversals of its magnetisation

C) molecular friction

D) its high retentivity

3 / 100

Category: Basic Electricity

3. Batteries are generally connected in______

A) Neither series nor parallel

B) Parallel

C) Series

D) Either series or parallel

4 / 100

Category: Basic Electricity

4. Insulating material can –

A) Protect a short circuit between two conductors

B) Store varying voltage

C) Conduct very large current

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

5 / 100

Category: Basic Electricity

5. Calculate the current across the 20 ohm resistor

A) 20 A

B) 10 A

C) 36.67 A

D) 6.67 A

6 / 100

Category: AC Fundamental

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

A) lags the current

B) leads the current

C) 90° leads the current

D) 90° lags the current

7 / 100

Category: AC Fundamental

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

A) 0.637

B) 0.707

C) 1.414

D) 1.11

8 / 100

Category: Basic Electricity

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

A) Is zero for all resistors

B) The same for all resistors

C) Is divided equally among all resistors

D) Is divided proportionally across all resistors

9 / 100

Category: AC Fundamental

9. 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 the same frequency

C) A sinusoid of half the original frequency

D) Not a sinusoid

10 / 100

Category: AC Fundamental

10. 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

11 / 100

Category: Circuit Theory & Network

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

A) Unity

B) Leading

C) Lagging

D) Zero

12 / 100

Category: Basic Electricity

12. 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

13 / 100

Category: AC Fundamental

13. 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

14 / 100

Category: AC Fundamental

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

A) 0.707

B) 1.11

C) 0.637

D) 1.414

15 / 100

Category: Basic Electricity

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

A) 10 mA

B) 15 mA

C) 1 mA

D) 1.5 mA

16 / 100

Category: Basic Electricity

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

A) A resistor

B) Open circuit

C) A normal capacitor as in AC

D) A short circuit

17 / 100

Category: Basic Electricity

17. 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 stops glowing

C) The other bulb glows with increased brightness

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

18 / 100

Category: Transformer

18. 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

19 / 100

Category: Basic Electricity

19. Find the voltage across the 6 ohm resistor

A) 54.48 V

B) 181.6 V

C) 150 V

D) 27.27 V

20 / 100

Category: Basic Electricity

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

A) 2 μs

B) 100 μs

C) 4 μs

D) 20 μs

21 / 100

Category: AC Fundamental

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

A) Capacitance is more & supply frequency is less

B) capacitance & supply frequency is more

C) capacitance is less & supply frequency is more

D) Capacitance & supply frequency is less

22 / 100

Category: Basic Electricity

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

A) 5 ohm

B) 27 ohm

C) 135 ohm

D) 12 ohm

23 / 100

Category: Magnetic Circuit

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

A) Electromagnetic fields

B) Electromagnets

C) Electromagnetism field

D) Electric magnets

24 / 100

Category: Basic Electricity

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

A) 50.625 W

B) 50625 W

C) 5062.5 W

D) 506.25 W

25 / 100

Category: AC Fundamental

25. 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

26 / 100

Category: Basic Electricity

26. Ideal voltage source has-

A) Zero internal resistance

B) High internal resistance

C) Low internal resistance

D) Infinity internal resistance

27 / 100

Category: AC Fundamental

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

A) P/S

B) Vr/V

C) R/Z

D) All of these

28 / 100

Category: Magnetic Circuit

28. Hysteresis loss least depends on –

A) volume of material

B) steinmetz coefficient of material

C) frequency

D) ambient temperature

29 / 100

Category: Magnetic Circuit

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

A) Current

B) Voltage drop

C) None

D) Emf

30 / 100

Category: Basic Electricity

30. 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) Current

C) Voltage

D) Both voltage and current

31 / 100

Category: Basic Electricity

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

A) False

B) True

32 / 100

Category: Basic Electricity

32. Electrolysis is possible with –

A) both A.C and D.C supply

B) A.C supply only

C) D.C supply only

D) none

33 / 100

Category: Magnetic Circuit

33. 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) 0

D) I/4

34 / 100

Category: Basic Electricity

34. 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) 2:5

B) 5:7

C) 7:5

D) 2:7

35 / 100

Category: Basic Electricity

35. 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) 32 times

D) 16 times

36 / 100

Category: Basic Electricity

36. In a pure inductive circuit current is

A) Leads by voltage by 0°

B) Lags by voltage by 0°

C) Lags behind Voltage by 90°

D) Leads by voltage by 90°

37 / 100

Category: Magnetic Circuit

37. 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) Produce current opposite to the increasing current

D) Aid the increasing current

38 / 100

Category: AC Fundamental

38. 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 are in phase

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

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

39 / 100

Category: AC Fundamental

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

A) Vr /V

B) R/Z

C) All of the above

D) P/S

40 / 100

Category: Basic Electricity

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

A) Black Brown Black Silver

B) Brown Black Golden Silver

C) Black Brown Black Golden

D) Brown Black Golden Golden

41 / 100

Category: AC Machines & Transformer

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

A) Battery

B) Transformer

C) Generator

D) Motor

42 / 100

Category: AC Fundamental

42. 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°

43 / 100

Category: Magnetic Circuit

43. An open coil has –

A) Infinite resistance and zero inductance

B) Infinite resistance and normal inductance

C) Zero resistance and inductance

D) Zero resistance and high inductance

44 / 100

Category: Magnetic Circuit

44. 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) 220 J

C) 150 J

D) 160 J

45 / 100

Category: Basic Electricity

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

A) 27°

B) 180°

C) 60°

D) 6°

46 / 100

Category: Magnetic Circuit

46. In a electric circuit MMF is similar to

A) Electromotive force

B) Resistance

C) Current

D) Flux

47 / 100

Category: Basic Electricity

47. In case of D.C –

A) Magnitude and direction remains constant

B) Magnitude and direction both change with time

C) Magnitude of current changes with time

D) Direction of current changes with time

48 / 100

Category: Basic Electricity

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

A) Polar

B) Short

C) Open

D) Non-polar

49 / 100

Category: AC Fundamental

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

A) Maximum load current

B) Low efficiency

C) High power factor

D) Unity power factor

50 / 100

Category: Basic Electricity

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

A) a normal capacitor as in AC

B) a short circuit

C) a resistor

D) open circuit

51 / 100

Category: AC Fundamental

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

A) none

B) electric field

C) both a and b

D) Magnetic field

52 / 100

Category: AC Fundamental

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

A) C only

B) R-L-C all

C) L only

D) R only

53 / 100

Category: AC Fundamental

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

A) All of these

B) R only

C) C only

D) L only

54 / 100

Category: AC Fundamental

54. Form factor of half wave rectified ac is-

A) 1.57

B) 2

C) 1.41

D) 1.11

55 / 100

Category: Basic Electricity

55. Calculate the resistance between A and B

A) 14.26 ohm

B) 3.56 ohm

C) 7 ohm

D) 29.69 ohm

56 / 100

Category: AC Fundamental

56. Average power taken by a pure capacitor is –

A) Zero

B) Maximum

C) Minimum

D) Unity

57 / 100

Category: Magnetic Circuit

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

A) Magnetomotive force

B) Electromotive difference

C) voltage

D) Electromotive force

58 / 100

Category: AC Fundamental

58. Capacitors for power factor correction are rated in -

A) KVA

B) KW

C) KVAR

D) VA

59 / 100

Category: Basic Electricity

59. Frequency of Direct Current is

A) 50 kHz

B) 0 Hz

C) 50 Hz

D) 40 Hz

60 / 100

Category: Basic Electricity

60. Calculate the equivalent resistance between A and B

A) 4 ohm

B) 6 ohm

C) 2 ohm

D) 8 ohm

61 / 100

Category: AC Fundamental

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

A) Lagging

B) leading

C) unity

D) zero

62 / 100

Category: Basic Electricity

62. Ideal voltage source has-

A) Zero internal resistance

B) Low internal resistance

C) High internal resistance

D) Infinity internal resistance

63 / 100

Category: Circuit Theory & Network

63. Battery is a

A) AC Sorce

B) Both of the above

C) DC Source

D) None of the above

64 / 100

Category: AC Fundamental

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

A) I max Lm value

B) I average value

C) I R.M.S.

D) None

65 / 100

Category: AC Fundamental

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

A) R/Z

B) All of the above

C) P/S

D) Vr /V

66 / 100

Category: Basic Electricity

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

A) 0

B) -1

C) Infinity

D) 1

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) initially increase and then decrease

B) Remain the same

C) Increase

D) decrease

68 / 100

Category: DC Machines

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

A) Flemmings Left Hand Rule

B) Cork Screw Rule

C) Flemmings Right Hand Rule

D) Lenz Law

69 / 100

Category: Basic Electricity

69. 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) 18.8 V

D) 4 V

70 / 100

Category: Magnetic Circuit

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

A) halved

B) doubled

C) quadrupled

D) Unaffected

71 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Parallel

C) Series

D) Both series and parallel

72 / 100

Category: Basic Electricity

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

A) 0 ohm

B) 0.48 ohm

C) 7 ohm

D) 7.67 ohm

73 / 100

Category: Magnetic Circuit

73. Higher the self-inductance of a coil –

A) lower the E.M.F. induced

B) Greater the flux produced by it

C) longer the delay in establishing steady current through it

D) Lesser its Weber-turns

74 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Either series or parallel

C) Parallel

D) Series

75 / 100

Category: Circuit Theory & Network

75. 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

76 / 100

Category: Basic Electricity

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

A) Ohmmeter

B) Ammeter

C) Multimeter

D) Voltmeter

77 / 100

Category: Basic Electricity

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

A) 1.11

B) 0.637

C) 1.414

D) 0.707

78 / 100

Category: Magnetic Circuit

78. 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) I/4

D) 0

79 / 100

Category: AC Fundamental

79. Form factor of square wave is-

A) 1.47

B) 2

C) 1

D) 1.41

80 / 100

Category: AC Fundamental

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

A) Heating effect

B) Voltage

C) Charge transfer

D) Current

81 / 100

Category: Basic Electricity

81. Calculate the equivalent resistance between A and B

A) 48 ohm

B) 60 ohm

C) 15 ohm

D) 12 ohm

82 / 100

Category: AC Fundamental

82. 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) 10 ohm

D) 2 ohm

83 / 100

Category: Basic Electricity

83. Calculate the equivalent resistance between A and B

A) 26.67 ohm

B) 46.67 ohm

C) 6.67 ohm

D) 10.67 ohm

84 / 100

Category: Basic Electricity

84. Electric pressure is also called –

A) Resistance

B) Conductance

C) Energy

D) Voltage

85 / 100

Category: Magnetic Circuit

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

A) L^2 I / 2

B) IL^2

C) LI^2

D) LI^2 / 2

86 / 100

Category: Basic Electricity

86. 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 continues to glow with the same brightness

C) The other bulb glows with increased brightness

D) The other bulb stops glowing

87 / 100

Category: Basic Electricity

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

A) Series

B) Neither series nor parallel

C) Either series or parallel

D) Parallel

88 / 100

Category: Basic Electricity

88. 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

89 / 100

Category: Circuit Theory & Network

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

A) Maximum

B) Zero

C) a very small amount

D) Minimum

90 / 100

Category: AC Fundamental

90. 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

91 / 100

Category: Basic Electricity

91. Calculate the total current in the circuit

A) 10 A

B) 11.43 A

C) 20 A

D) 15 A

92 / 100

Category: Basic Electricity

92. Find the current in the circuit.

A) 3 A

B) 2 A

C) 1 A

D) 4 A

93 / 100

Category: Basic Electricity

93. 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) 8 times

D) 4 times

94 / 100

Category: AC Fundamental

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

A) 1.414

B) 0.637

C) 1.11

D) 0.707

95 / 100

Category: Basic Electricity

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

A) None of the above

B) 6.5 V

C) 26 V

D) 13 V

96 / 100

Category: AC Fundamental

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

A) None

B) 1 Hz

C) 2π Hz

D) π Hz

97 / 100

Category: Magnetic Circuit

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

A) 5 V

B) 2.5 V

C) 1.5 V

D) 3.5 V

98 / 100

Category: Circuit Theory & Network

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

A) Lagging

B) Zero

C) Unity

D) Leading

99 / 100

Category: Basic Electricity

99. KWh is the unit of -

A) Efficiency

B) Energy

C) Work

D) Power

100 / 100

Category: Magnetic Circuit

100. 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) 15 J

C) 60 J

D) 20 J

Your score is

The average score is 23%

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