SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

196

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. Calculate the equivalent resistance between A and B

A) 15 ohm

B) 12 ohm

C) 60 ohm

D) 48 ohm

2 / 100

Category: DC Machines

2. 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

3 / 100

Category: Basic Electricity

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

A) 1.11

B) 1.414

C) 0.707

D) 0.637

4 / 100

Category: Basic Electricity

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

A) Ammeter

B) Multimeter

C) Ohmmeter

D) Voltmeter

5 / 100

Category: Basic Electricity

5. Ideal voltage source has-

A) High internal resistance

B) Zero internal resistance

C) Low internal resistance

D) Infinity internal resistance

6 / 100

Category: Circuit Theory & Network

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

A) Leading

B) Zero

C) Lagging

D) Unity

7 / 100

Category: Magnetic Circuit

7. Hysteresis loss least depends on –

A) volume of material

B) steinmetz coefficient of material

C) ambient temperature

D) frequency

8 / 100

Category: Magnetic Circuit

8. 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

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) 15 J

C) 20 J

D) 60 J

10 / 100

Category: Basic Electricity

10. Frequency of Direct Current is

A) 50 kHz

B) 50 Hz

C) 0 Hz

D) 40 Hz

11 / 100

Category: AC Fundamental

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

A) P/S

B) All of the above

C) Vr /V

D) R/Z

12 / 100

Category: Basic Electricity

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

A) 10 mA

B) 1 mA

C) 15 mA

D) 1.5 mA

13 / 100

Category: Basic Electricity

13. Ideal voltage source has-

A) Zero internal resistance

B) Low internal resistance

C) High internal resistance

D) Infinity internal resistance

14 / 100

Category: AC Fundamental

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

A) R-L-C all

B) L only

C) C only

D) R only

15 / 100

Category: Magnetic Circuit

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

A) L^2 I / 2

B) IL^2

C) LI^2 / 2

D) LI^2

16 / 100

Category: AC Fundamental

16. Form factor of square wave is-

A) 1

B) 1.41

C) 1.47

D) 2

17 / 100

Category: Basic Electricity

17. KWh is the unit of -

A) Power

B) Work

C) Efficiency

D) Energy

18 / 100

Category: Basic Electricity

18. 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) 2:5

C) 7:5

D) 5:7

19 / 100

Category: Magnetic Circuit

19. 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) 20 J

B) 60 J

C) 15 J

D) 90 J

20 / 100

Category: AC Fundamental

20. Average power taken by a pure capacitor is –

A) Unity

B) Zero

C) Maximum

D) Minimum

21 / 100

Category: AC Fundamental

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

A) Current

B) Heating effect

C) Voltage

D) Charge transfer

22 / 100

Category: AC Fundamental

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

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

23 / 100

Category: AC Fundamental

23. 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

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 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

25 / 100

Category: AC Fundamental

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

A) electric field

B) both a and b

C) none

D) Magnetic field

26 / 100

Category: Basic Electricity

26. Electric pressure is also called –

A) Energy

B) Resistance

C) Conductance

D) Voltage

27 / 100

Category: Magnetic Circuit

27. 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) 2.5 V

D) 5 V

28 / 100

Category: Magnetic Circuit

28. 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

29 / 100

Category: Basic Electricity

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

A) 7.67 ohm

B) 7 ohm

C) 0.48 ohm

D) 0 ohm

30 / 100

Category: AC Fundamental

30. Capacitive Susceptance is a measure of –

A) Reactive power in a circuit

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

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

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

31 / 100

Category: AC Fundamental

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

A) R/Z

B) P/S

C) All of these

D) Vr/V

32 / 100

Category: AC Fundamental

32. 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 the same frequency

C) Not a sinusoid

D) A sinusoid of double the frequency

33 / 100

Category: Basic Electricity

33. Instantaneous power in inductor is proportional to the –

A) Temperature of the inductor

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

C) Square of instantaneous current

D) Square of rate of change of current

34 / 100

Category: AC Fundamental

34. 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 are in phase

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

35 / 100

Category: Basic Electricity

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

A) False

B) True

36 / 100

Category: AC Fundamental

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

A) 1.414

B) 1.11

C) 0.637

D) 0.707

37 / 100

Category: Circuit Theory & Network

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

A) Minimum

B) a very small amount

C) Zero

D) Maximum

38 / 100

Category: Circuit Theory & Network

38. In any AC circuit always –

A) Reactive power is more than actual power

B) Actual power is more than reactive power

C) Reactive power is more than apparent power

D) Apparent power is more than actual power

39 / 100

Category: Basic Electricity

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

A) -1

B) 1

C) 0

D) Infinity

40 / 100

Category: Basic Electricity

40. In a pure inductive circuit current is

A) Lags by voltage by 0°

B) Leads by voltage by 90°

C) Lags behind Voltage by 90°

D) Leads by voltage by 0°

41 / 100

Category: AC Fundamental

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

A) 1.11

B) 1.414

C) 0.637

D) 0.707

42 / 100

Category: Transformer

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

A) 100 A, 25A

B) 5 A, 125 A

C) 125 A, 5 A

D) 30 A, 50 A

43 / 100

Category: AC Fundamental

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

A) Unity power factor

B) High power factor

C) Maximum load current

D) Low efficiency

44 / 100

Category: Basic Electricity

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

A) 8 times

B) 16 times

C) 4 times

D) 32 times

45 / 100

Category: AC Fundamental

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

A) L only

B) R only

C) C only

D) All of these

46 / 100

Category: Magnetic Circuit

46. An open coil has –

A) Zero resistance and high inductance

B) Infinite resistance and normal inductance

C) Infinite resistance and zero inductance

D) Zero resistance and inductance

47 / 100

Category: AC Fundamental

47. 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

48 / 100

Category: Magnetic Circuit

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

A) molecular friction

B) its high retentivity

C) rapid reversals of its magnetisation

D) flux density lagging behind magnetising force

49 / 100

Category: Basic Electricity

49. 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) 5062.5 W

C) 50.625 W

D) 50625 W

50 / 100

Category: Magnetic Circuit

50. 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

51 / 100

Category: Magnetic Circuit

51. 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) Unaffected

C) doubled

D) halved

52 / 100

Category: AC Fundamental

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

A) Lagging

B) leading

C) zero

D) unity

53 / 100

Category: Basic Electricity

53. 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

54 / 100

Category: Magnetic Circuit

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

A) voltage

B) Magnetomotive force

C) Electromotive difference

D) Electromotive force

55 / 100

Category: Basic Electricity

55. 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

56 / 100

Category: Basic Electricity

56. 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

57 / 100

Category: Circuit Theory & Network

57. 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) Leading

C) Lagging

D) Zero

58 / 100

Category: AC Machines & Transformer

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

A) Transformer

B) Battery

C) Generator

D) Motor

59 / 100

Category: Basic Electricity

59. Calculate the current across the 20 ohm resistor

A) 10 A

B) 20 A

C) 36.67 A

D) 6.67 A

60 / 100

Category: Circuit Theory & Network

60. Battery is a

A) AC Sorce

B) Both of the above

C) DC Source

D) None of the above

61 / 100

Category: AC Fundamental

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

A) 2π Hz

B) None

C) 1 Hz

D) π Hz

62 / 100

Category: Basic Electricity

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

A) Black Brown Black Silver

B) Brown Black Golden Silver

C) Brown Black Golden Golden

D) Black Brown Black Golden

63 / 100

Category: AC Fundamental

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

A) Vr /V

B) All of the above

C) P/S

D) R/Z

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) I

B) I/2

C) I/4

D) 0

65 / 100

Category: AC Fundamental

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

A) I max Lm value

B) None

C) I R.M.S.

D) I average value

66 / 100

Category: Magnetic Circuit

66. In a electric circuit MMF is similar to

A) Current

B) Resistance

C) Flux

D) Electromotive force

67 / 100

Category: AC Fundamental

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

A) R-L-C all

B) C only

C) L only

D) R only

68 / 100

Category: Basic Electricity

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

A) 180°

B) 27°

C) 60°

D) 6°

69 / 100

Category: Basic Electricity

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

A) open circuit

B) a normal capacitor as in AC

C) a resistor

D) a short circuit

70 / 100

Category: Basic Electricity

70. Calculate the equivalent resistance between A and B

A) 46.67 ohm

B) 26.67 ohm

C) 6.67 ohm

D) 10.67 ohm

71 / 100

Category: AC Fundamental

71. 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

72 / 100

Category: Magnetic Circuit

72. 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) decrease

B) Increase

C) initially increase and then decrease

D) Remain the same

73 / 100

Category: AC Fundamental

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

A) 0.637

B) 1.11

C) 1.414

D) 0.707

74 / 100

Category: Basic Electricity

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

A) 12 ohm

B) 135 ohm

C) 5 ohm

D) 27 ohm

75 / 100

Category: Basic Electricity

75. 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) 5 kWh

B) 2 kWh

C) 4 kWh

D) 1 kWh

76 / 100

Category: Basic Electricity

76. Find the voltage across the 6 ohm resistor

A) 54.48 V

B) 27.27 V

C) 181.6 V

D) 150 V

77 / 100

Category: Basic Electricity

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

A) Short

B) Open

C) Polar

D) Non-polar

78 / 100

Category: Basic Electricity

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

A) Either series or parallel

B) Parallel

C) Series

D) Neither series nor parallel

79 / 100

Category: AC Fundamental

79. Form factor of half wave rectified ac is-

A) 1.57

B) 1.11

C) 2

D) 1.41

80 / 100

Category: Basic Electricity

80. Calculate the equivalent resistance between A and B

A) 8 ohm

B) 4 ohm

C) 6 ohm

D) 2 ohm

81 / 100

Category: Basic Electricity

81. Insulating material can –

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

B) Protect a short circuit between two conductors

C) Conduct very large current

D) Store varying voltage

82 / 100

Category: Basic Electricity

82. Batteries are generally connected in______

A) Parallel

B) Series

C) Either series or parallel

D) Neither series nor parallel

83 / 100

Category: Basic Electricity

83. Calculate the resistance between A and B

A) 3.56 ohm

B) 29.69 ohm

C) 7 ohm

D) 14.26 ohm

84 / 100

Category: Basic Electricity

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

A) 6.5 V

B) 13 V

C) None of the above

D) 26 V

85 / 100

Category: Magnetic Circuit

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

A) Electric magnets

B) Electromagnets

C) Electromagnetism field

D) Electromagnetic fields

86 / 100

Category: Basic Electricity

86. Electrolysis is possible with –

A) none

B) A.C supply only

C) both A.C and D.C supply

D) D.C supply only

87 / 100

Category: Basic Electricity

87. Calculate the total current in the circuit

A) 10 A

B) 15 A

C) 20 A

D) 11.43 A

88 / 100

Category: Basic Electricity

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

A) A normal capacitor as in AC

B) A resistor

C) A short circuit

D) Open circuit

89 / 100

Category: Basic Electricity

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

A) The same for all resistors

B) Is zero for all resistors

C) Is divided proportionally across all resistors

D) Is divided equally among all resistors

90 / 100

Category: Magnetic Circuit

90. 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) 190 J

D) 160 J

91 / 100

Category: AC Fundamental

91. 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

92 / 100

Category: Basic Electricity

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

A) Series

B) Parallel

C) Neither series nor parallel

D) Both series and parallel

93 / 100

Category: Magnetic Circuit

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

A) None

B) Voltage drop

C) Emf

D) Current

94 / 100

Category: AC Fundamental

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

A) R/Z

B) Vr/V

C) All of the above

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

95 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Either series or parallel

C) Series

D) Parallel

96 / 100

Category: AC Fundamental

96. Capacitors for power factor correction are rated in -

A) KVA

B) VA

C) KVAR

D) KW

97 / 100

Category: Basic Electricity

97. Find the current in the circuit.

A) 4 A

B) 3 A

C) 1 A

D) 2 A

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 glows with increased brightness

B) The other bulb also burns out

C) The other bulb stops glowing

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

99 / 100

Category: Basic Electricity

99. In case of D.C –

A) Magnitude and direction both change with time

B) Direction of current changes with time

C) Magnitude and direction remains constant

D) Magnitude of current changes with time

100 / 100

Category: Basic Electricity

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

A) Voltage

B) Current

C) Neither voltage nor current

D) Both voltage and current

Your score is

The average score is 23%

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