SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

185

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. 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

2 / 100

Category: Magnetic Circuit

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

A) doubled

B) quadrupled

C) Unaffected

D) halved

3 / 100

Category: Basic Electricity

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

A) 0

B) 1

C) Infinity

D) -1

4 / 100

Category: AC Fundamental

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

A) Vr/V

B) P/S

C) R/Z

D) All of these

5 / 100

Category: Basic Electricity

5. Calculate the equivalent resistance between A and B

A) 60 ohm

B) 48 ohm

C) 15 ohm

D) 12 ohm

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 continues to glow with the same brightness

B) The other bulb stops glowing

C) The other bulb also burns out

D) The other bulb glows with increased brightness

7 / 100

Category: AC Fundamental

7. Form factor of half wave rectified ac is-

A) 2

B) 1.41

C) 1.11

D) 1.57

8 / 100

Category: Transformer

8. 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

9 / 100

Category: Magnetic Circuit

9. In a electric circuit MMF is similar to

A) Resistance

B) Flux

C) Current

D) Electromotive force

10 / 100

Category: Magnetic Circuit

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

A) IL^2

B) LI^2

C) LI^2 / 2

D) L^2 I / 2

11 / 100

Category: Basic Electricity

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

A) 0.707

B) 0.637

C) 1.11

D) 1.414

12 / 100

Category: AC Fundamental

12. 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 & supply frequency is less

D) capacitance is less & supply frequency is more

13 / 100

Category: Basic Electricity

13. In a pure inductive circuit current is

A) Lags by voltage by 0°

B) Leads by voltage by 90°

C) Leads by voltage by 0°

D) Lags behind Voltage by 90°

14 / 100

Category: Basic Electricity

14. 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

15 / 100

Category: Basic Electricity

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

A) None of the above

B) 13 V

C) 26 V

D) 6.5 V

16 / 100

Category: AC Fundamental

16. Capacitors for power factor correction are rated in -

A) KW

B) KVAR

C) VA

D) KVA

17 / 100

Category: Basic Electricity

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

A) 4 times

B) 8 times

C) 32 times

D) 16 times

18 / 100

Category: AC Fundamental

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

A) lags the current

B) leads the current

C) 90° lags the current

D) 90° leads the current

19 / 100

Category: Circuit Theory & Network

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

A) Unity

B) Zero

C) Leading

D) Lagging

20 / 100

Category: AC Fundamental

20. 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

21 / 100

Category: AC Machines & Transformer

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

A) Transformer

B) Battery

C) Motor

D) Generator

22 / 100

Category: Basic Electricity

22. Batteries are generally connected in______

A) Either series or parallel

B) Neither series nor parallel

C) Parallel

D) Series

23 / 100

Category: AC Fundamental

23. 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

24 / 100

Category: AC Fundamental

24. 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) A purely capacitive circuit's ability to pass current

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

25 / 100

Category: Magnetic Circuit

25. Hysteresis loss least depends on –

A) ambient temperature

B) steinmetz coefficient of material

C) volume of material

D) frequency

26 / 100

Category: Basic Electricity

26. Calculate the total current in the circuit

A) 11.43 A

B) 20 A

C) 15 A

D) 10 A

27 / 100

Category: Magnetic Circuit

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

A) rapid reversals of its magnetisation

B) flux density lagging behind magnetising force

C) its high retentivity

D) molecular friction

28 / 100

Category: Basic Electricity

28. In case of D.C –

A) Magnitude of current changes with time

B) Magnitude and direction both change with time

C) Direction of current changes with time

D) Magnitude and direction remains constant

29 / 100

Category: Basic Electricity

29. 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

30 / 100

Category: Basic Electricity

30. Ideal voltage source has-

A) Infinity internal resistance

B) Zero internal resistance

C) Low internal resistance

D) High internal resistance

31 / 100

Category: Magnetic Circuit

31. 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) Increase

C) decrease

D) Remain the same

32 / 100

Category: Basic Electricity

32. 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 proportionally across all resistors

D) Is divided equally among all resistors

33 / 100

Category: Basic Electricity

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

A) 2 μs

B) 100 μs

C) 20 μs

D) 4 μs

34 / 100

Category: AC Fundamental

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

A) 0.637

B) 1.414

C) 0.707

D) 1.11

35 / 100

Category: Magnetic Circuit

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

A) Current

B) Emf

C) Voltage drop

D) None

36 / 100

Category: Magnetic Circuit

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

A) voltage

B) Magnetomotive force

C) Electromotive force

D) Electromotive difference

37 / 100

Category: Circuit Theory & Network

37. 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

38 / 100

Category: Basic Electricity

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

A) 7.67 ohm

B) 0 ohm

C) 7 ohm

D) 0.48 ohm

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 mA

B) 15 mA

C) 10 mA

D) 1.5 mA

40 / 100

Category: AC Fundamental

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

A) R-L-C all

B) R only

C) L only

D) C only

41 / 100

Category: AC Fundamental

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

A) 1.414

B) 1.11

C) 0.637

D) 0.707

42 / 100

Category: Basic Electricity

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

A) False

B) True

43 / 100

Category: AC Fundamental

43. 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

44 / 100

Category: Magnetic Circuit

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

A) Electromagnetic fields

B) Electric magnets

C) Electromagnetism field

D) Electromagnets

45 / 100

Category: AC Fundamental

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

A) Current

B) Voltage

C) Heating effect

D) Charge transfer

46 / 100

Category: Basic Electricity

46. Calculate the equivalent resistance between A and B

A) 26.67 ohm

B) 10.67 ohm

C) 6.67 ohm

D) 46.67 ohm

47 / 100

Category: AC Fundamental

47. Average power taken by a pure capacitor is –

A) Maximum

B) Minimum

C) Zero

D) Unity

48 / 100

Category: Basic Electricity

48. Calculate the resistance between A and B

A) 14.26 ohm

B) 3.56 ohm

C) 7 ohm

D) 29.69 ohm

49 / 100

Category: Basic Electricity

49. Frequency of Direct Current is

A) 50 Hz

B) 40 Hz

C) 50 kHz

D) 0 Hz

50 / 100

Category: Magnetic Circuit

50. 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

C) I/2

D) I/4

51 / 100

Category: Magnetic Circuit

51. 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

52 / 100

Category: Basic Electricity

52. Electric pressure is also called –

A) Resistance

B) Energy

C) Conductance

D) Voltage

53 / 100

Category: AC Fundamental

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

A) electric field

B) Magnetic field

C) both a and b

D) none

54 / 100

Category: AC Fundamental

54. 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

55 / 100

Category: Basic Electricity

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

A) The other bulb stops glowing

B) The other bulb glows with increased brightness

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

D) The other bulb blows out as well

56 / 100

Category: DC Machines

56. 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

57 / 100

Category: Basic Electricity

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

A) 12 ohm

B) 27 ohm

C) 135 ohm

D) 5 ohm

58 / 100

Category: Basic Electricity

58. Find the current in the circuit.

A) 3 A

B) 1 A

C) 2 A

D) 4 A

59 / 100

Category: Magnetic Circuit

59. 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

60 / 100

Category: Basic Electricity

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

A) 4 times

B) 8 times

C) 32 times

D) 16 times – of the previous

61 / 100

Category: AC Fundamental

61. 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

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) 2:5

B) 5:7

C) 7:5

D) 2:7

63 / 100

Category: AC Fundamental

63. Form factor of square wave is-

A) 1.41

B) 1

C) 2

D) 1.47

64 / 100

Category: Basic Electricity

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

A) 5062.5 W

B) 50625 W

C) 506.25 W

D) 50.625 W

65 / 100

Category: Basic Electricity

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

A) Ohmmeter

B) Ammeter

C) Multimeter

D) Voltmeter

66 / 100

Category: AC Fundamental

66. 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

67 / 100

Category: Circuit Theory & Network

67. Battery is a

A) DC Source

B) Both of the above

C) AC Sorce

D) None of the above

68 / 100

Category: Magnetic Circuit

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

A) 2.5 V

B) 5 V

C) 1.5 V

D) 3.5 V

69 / 100

Category: Basic Electricity

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

A) Series

B) Parallel

C) Neither series nor parallel

D) Either series or parallel

70 / 100

Category: Basic Electricity

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

A) Non-polar

B) Polar

C) Short

D) Open

71 / 100

Category: Basic Electricity

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

A) Black Brown Black Golden

B) Brown Black Golden Silver

C) Brown Black Golden Golden

D) Black Brown Black Silver

72 / 100

Category: Basic Electricity

72. 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) 20 J

D) 90 J

73 / 100

Category: Basic Electricity

73. Insulating material can –

A) Store varying voltage

B) Protect a short circuit between two conductors

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

D) Conduct very large current

74 / 100

Category: Magnetic Circuit

74. 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) 220 J

B) 150 J

C) 160 J

D) 190 J

75 / 100

Category: Magnetic Circuit

75. 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) 60 J

C) 15 J

D) 20 J

76 / 100

Category: Basic Electricity

76. Ideal voltage source has-

A) High internal resistance

B) Infinity internal resistance

C) Zero internal resistance

D) Low internal resistance

77 / 100

Category: Basic Electricity

77. Instantaneous power in inductor is proportional to the –

A) Square of instantaneous current

B) Temperature of the inductor

C) Square of rate of change of current

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

78 / 100

Category: Basic Electricity

78. Calculate the current across the 20 ohm resistor

A) 20 A

B) 10 A

C) 36.67 A

D) 6.67 A

79 / 100

Category: AC Fundamental

79. 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°

80 / 100

Category: Circuit Theory & Network

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

A) a very small amount

B) Zero

C) Maximum

D) Minimum

81 / 100

Category: AC Fundamental

81. 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) The voltage across R leads the voltage across L by 90°

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

D) Voltage across R and L are in phase

82 / 100

Category: Basic Electricity

82. Find the voltage across the 6 ohm resistor

A) 181.6 V

B) 27.27 V

C) 54.48 V

D) 150 V

83 / 100

Category: Basic Electricity

83. 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

84 / 100

Category: Magnetic Circuit

84. Higher the self-inductance of a coil –

A) longer the delay in establishing steady current through it

B) Greater the flux produced by it

C) lower the E.M.F. induced

D) Lesser its Weber-turns

85 / 100

Category: AC Fundamental

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

A) L only

B) R-L-C all

C) C only

D) R only

86 / 100

Category: Circuit Theory & Network

86. In any AC circuit always –

A) Reactive power is more than actual power

B) Actual power is more than reactive power

C) Apparent power is more than actual power

D) Reactive power is more than apparent power

87 / 100

Category: Basic Electricity

87. 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

88 / 100

Category: AC Fundamental

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

A) Lagging

B) unity

C) zero

D) leading

89 / 100

Category: AC Fundamental

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

A) Vr /V

B) R/Z

C) P/S

D) All of the above

90 / 100

Category: AC Fundamental

90. 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

91 / 100

Category: Magnetic Circuit

91. 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

D) I/2

92 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Parallel

C) Series

D) Either series or parallel

93 / 100

Category: Basic Electricity

93. 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

94 / 100

Category: Basic Electricity

94. Calculate the equivalent resistance between A and B

A) 8 ohm

B) 2 ohm

C) 6 ohm

D) 4 ohm

95 / 100

Category: AC Fundamental

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

A) R/Z

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

C) All of the above

D) Vr/V

96 / 100

Category: AC Fundamental

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

A) R only

B) L only

C) C only

D) All of these

97 / 100

Category: Basic Electricity

97. KWh is the unit of -

A) Power

B) Efficiency

C) Work

D) Energy

98 / 100

Category: Basic Electricity

98. Electrolysis is possible with –

A) D.C supply only

B) A.C supply only

C) both A.C and D.C supply

D) none

99 / 100

Category: Basic Electricity

99. 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

100 / 100

Category: Basic Electricity

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

A) 180°

B) 6°

C) 27°

D) 60°

Your score is

The average score is 22%

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