SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

269

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: Magnetic Circuit

1. Hysteresis loss least depends on –

A) volume of material

B) ambient temperature

C) frequency

D) steinmetz coefficient of material

2 / 100

Category: Basic Electricity

2. 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

3 / 100

Category: Magnetic Circuit

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

A) LI^2 / 2

B) L^2 I / 2

C) LI^2

D) IL^2

4 / 100

Category: AC Fundamental

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

A) I average value

B) I max Lm value

C) I R.M.S.

D) None

5 / 100

Category: Basic Electricity

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

A) 0

B) Infinity

C) -1

D) 1

6 / 100

Category: Magnetic Circuit

6. 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) 60 J

C) 20 J

D) 90 J

7 / 100

Category: Basic Electricity

7. 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) 1 kWh

C) 5 kWh

D) 4 kWh

8 / 100

Category: Basic Electricity

8. Instantaneous power in inductor is proportional to the –

A) Square of instantaneous current

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

C) Temperature of the inductor

D) Square of rate of change of current

9 / 100

Category: Magnetic Circuit

9. 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

10 / 100

Category: AC Fundamental

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

A) High power factor

B) Maximum load current

C) Unity power factor

D) Low efficiency

11 / 100

Category: Magnetic Circuit

11. 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) I/2

C) 0

D) I

12 / 100

Category: AC Fundamental

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

A) zero

B) unity

C) leading

D) Lagging

13 / 100

Category: Basic Electricity

13. KWh is the unit of -

A) Work

B) Power

C) Efficiency

D) Energy

14 / 100

Category: AC Fundamental

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

A) Current

B) Charge transfer

C) Heating effect

D) Voltage

15 / 100

Category: Basic Electricity

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

A) Parallel

B) Neither series nor parallel

C) Either series or parallel

D) Series

16 / 100

Category: AC Fundamental

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

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

B) Voltage across R and L are in phase

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

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

17 / 100

Category: AC Fundamental

17. Form factor of half wave rectified ac is-

A) 1.57

B) 1.11

C) 2

D) 1.41

18 / 100

Category: Circuit Theory & Network

18. 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) Leading

C) Lagging

D) Unity

19 / 100

Category: Magnetic Circuit

19. 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) 3.5 V

C) 5 V

D) 1.5 V

20 / 100

Category: Basic Electricity

20. Frequency of Direct Current is

A) 0 Hz

B) 50 kHz

C) 40 Hz

D) 50 Hz

21 / 100

Category: Magnetic Circuit

21. 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 increasing current

C) Produce current opposite to the increasing current

D) Aid the applied voltage

22 / 100

Category: Basic Electricity

22. Ideal voltage source has-

A) Low internal resistance

B) Zero internal resistance

C) Infinity internal resistance

D) High internal resistance

23 / 100

Category: Magnetic Circuit

23. An open coil has –

A) Zero resistance and inductance

B) Zero resistance and high inductance

C) Infinite resistance and zero inductance

D) Infinite resistance and normal inductance

24 / 100

Category: AC Fundamental

24. Capacitors for power factor correction are rated in -

A) KW

B) KVA

C) VA

D) KVAR

25 / 100

Category: Circuit Theory & Network

25. 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) Lagging

C) Leading

D) Zero

26 / 100

Category: Basic Electricity

26. 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

27 / 100

Category: Magnetic Circuit

27. 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) Increase

B) initially increase and then decrease

C) decrease

D) Remain the same

28 / 100

Category: AC Fundamental

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

A) 0.707

B) 1.11

C) 0.637

D) 1.414

29 / 100

Category: Basic Electricity

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

A) Is zero for all resistors

B) Is divided equally among all resistors

C) The same for all resistors

D) Is divided proportionally across all resistors

30 / 100

Category: AC Fundamental

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

A) R only

B) C only

C) L only

D) R-L-C all

31 / 100

Category: Basic Electricity

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

A) Voltage

B) Neither voltage nor current

C) Both voltage and current

D) Current

32 / 100

Category: Basic Electricity

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

A) 6°

B) 27°

C) 180°

D) 60°

33 / 100

Category: Basic Electricity

33. Electric pressure is also called –

A) Energy

B) Voltage

C) Resistance

D) Conductance

34 / 100

Category: AC Fundamental

34. Form factor of square wave is-

A) 1

B) 2

C) 1.47

D) 1.41

35 / 100

Category: AC Fundamental

35. 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) A sinusoid of the same frequency

D) Not a sinusoid

36 / 100

Category: Basic Electricity

36. Calculate the equivalent resistance between A and B

A) 2 ohm

B) 8 ohm

C) 6 ohm

D) 4 ohm

37 / 100

Category: AC Fundamental

37. 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 leads the voltage across L by 90°

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

38 / 100

Category: Circuit Theory & Network

38. 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

39 / 100

Category: AC Fundamental

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

A) both a and b

B) electric field

C) none

D) Magnetic field

40 / 100

Category: AC Fundamental

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

A) 0.707

B) 0.637

C) 1.414

D) 1.11

41 / 100

Category: AC Fundamental

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

A) Vr/V

B) All of the above

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

D) R/Z

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) 125 A, 5 A

B) 30 A, 50 A

C) 100 A, 25A

D) 5 A, 125 A

43 / 100

Category: Basic Electricity

43. Find the voltage across the 6 ohm resistor

A) 181.6 V

B) 54.48 V

C) 150 V

D) 27.27 V

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) 160 J

B) 220 J

C) 190 J

D) 150 J

45 / 100

Category: AC Fundamental

45. Average power taken by a pure capacitor is –

A) Zero

B) Minimum

C) Maximum

D) Unity

46 / 100

Category: Basic Electricity

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

A) 26.6 V

B) 4 V

C) 2.66 V

D) 18.8 V

47 / 100

Category: AC Fundamental

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

A) P/S

B) Vr /V

C) R/Z

D) All of the above

48 / 100

Category: Basic Electricity

48. 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

49 / 100

Category: Basic Electricity

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

A) Short

B) Non-polar

C) Polar

D) Open

50 / 100

Category: Basic Electricity

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

A) 26 V

B) 6.5 V

C) 13 V

D) None of the above

51 / 100

Category: Basic Electricity

51. Calculate the resistance between A and B

A) 7 ohm

B) 3.56 ohm

C) 14.26 ohm

D) 29.69 ohm

52 / 100

Category: Basic Electricity

52. Calculate the current across the 20 ohm resistor

A) 6.67 A

B) 10 A

C) 20 A

D) 36.67 A

53 / 100

Category: Basic Electricity

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

A) Voltmeter

B) Ammeter

C) Multimeter

D) Ohmmeter

54 / 100

Category: Basic Electricity

54. Calculate the equivalent resistance between A and B

A) 15 ohm

B) 12 ohm

C) 48 ohm

D) 60 ohm

55 / 100

Category: Basic Electricity

55. Find the current in the circuit.

A) 4 A

B) 2 A

C) 3 A

D) 1 A

56 / 100

Category: Basic Electricity

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

A) Brown Black Golden Silver

B) Black Brown Black Golden

C) Black Brown Black Silver

D) Brown Black Golden Golden

57 / 100

Category: Basic Electricity

57. 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

58 / 100

Category: Basic Electricity

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

A) 20 μs

B) 4 μs

C) 2 μs

D) 100 μs

59 / 100

Category: Magnetic Circuit

59. In a electric circuit MMF is similar to

A) Electromotive force

B) Current

C) Resistance

D) Flux

60 / 100

Category: Basic Electricity

60. In case of D.C –

A) Magnitude and direction both change with time

B) Magnitude of current changes with time

C) Magnitude and direction remains constant

D) Direction of current changes with time

61 / 100

Category: Circuit Theory & Network

61. Battery is a

A) AC Sorce

B) DC Source

C) Both of the above

D) None of the above

62 / 100

Category: DC Machines

62. 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

63 / 100

Category: Basic Electricity

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

A) A short circuit

B) Open circuit

C) A normal capacitor as in AC

D) A resistor

64 / 100

Category: AC Fundamental

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

A) C only

B) L only

C) All of these

D) R only

65 / 100

Category: Basic Electricity

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

A) True

B) False

66 / 100

Category: AC Fundamental

66. 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

67 / 100

Category: Basic Electricity

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

A) 0.637

B) 0.707

C) 1.11

D) 1.414

68 / 100

Category: Basic Electricity

68. 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

69 / 100

Category: AC Fundamental

69. If the inductive reactance of a coil is 6 ohm and internal resistance is 8 ohm, then the impedance will be –

A) 10 ohm

B) 14 ohm

C) 2 ohm

D) 2 ohm

70 / 100

Category: AC Fundamental

70. Capacitive Susceptance is a measure of –

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

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

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

D) Reactive power in a circuit

71 / 100

Category: Basic Electricity

71. 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

72 / 100

Category: Basic Electricity

72. Batteries are generally connected in______

A) Series

B) Parallel

C) Either series or parallel

D) Neither series nor parallel

73 / 100

Category: Magnetic Circuit

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

A) Current

B) Emf

C) Voltage drop

D) None

74 / 100

Category: Basic Electricity

74. In a pure inductive circuit current is

A) Lags behind Voltage by 90°

B) Leads by voltage by 90°

C) Lags by voltage by 0°

D) Leads by voltage by 0°

75 / 100

Category: Magnetic Circuit

75. 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

76 / 100

Category: Magnetic Circuit

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

A) Electromagnets

B) Electromagnetism field

C) Electric magnets

D) Electromagnetic fields

77 / 100

Category: Basic Electricity

77. 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) 50.625 W

C) 5062.5 W

D) 506.25 W

78 / 100

Category: AC Fundamental

78. 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

79 / 100

Category: Basic Electricity

79. 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

80 / 100

Category: Basic Electricity

80. Electrolysis is possible with –

A) both A.C and D.C supply

B) A.C supply only

C) D.C supply only

D) none

81 / 100

Category: Basic Electricity

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

A) Parallel

B) Series

C) Both series and parallel

D) Neither series nor parallel

82 / 100

Category: AC Fundamental

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

A) C only

B) R-L-C all

C) R only

D) L only

83 / 100

Category: AC Fundamental

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

A) 2π Hz

B) π Hz

C) None

D) 1 Hz

84 / 100

Category: Basic Electricity

84. Calculate the equivalent resistance between A and B

A) 26.67 ohm

B) 46.67 ohm

C) 10.67 ohm

D) 6.67 ohm

85 / 100

Category: Magnetic Circuit

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

A) Magnetomotive force

B) voltage

C) Electromotive force

D) Electromotive difference

86 / 100

Category: Basic Electricity

86. 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) 1.5 mA

D) 1 mA

87 / 100

Category: Circuit Theory & Network

87. 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

88 / 100

Category: AC Fundamental

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

A) 90° leads the current

B) 90° lags the current

C) leads the current

D) lags the current

89 / 100

Category: Magnetic Circuit

89. 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

90 / 100

Category: Magnetic Circuit

90. 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

91 / 100

Category: Basic Electricity

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

A) 7 ohm

B) 0.48 ohm

C) 7.67 ohm

D) 0 ohm

92 / 100

Category: AC Fundamental

92. 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

93 / 100

Category: AC Fundamental

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

A) All of these

B) P/S

C) R/Z

D) Vr/V

94 / 100

Category: AC Fundamental

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

A) 0.637

B) 1.414

C) 0.707

D) 1.11

95 / 100

Category: Basic Electricity

95. Insulating material can –

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

B) Protect a short circuit between two conductors

C) Store varying voltage

D) Conduct very large current

96 / 100

Category: Basic Electricity

96. Ideal voltage source has-

A) High internal resistance

B) Zero internal resistance

C) Infinity internal resistance

D) Low internal resistance

97 / 100

Category: Basic Electricity

97. Calculate the total current in the circuit

A) 15 A

B) 11.43 A

C) 10 A

D) 20 A

98 / 100

Category: Basic Electricity

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

A) 60 J

B) 90 J

C) 15 J

D) 20 J

99 / 100

Category: Basic Electricity

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

A) 32 times

B) 16 times

C) 8 times

D) 4 times

100 / 100

Category: AC Machines & Transformer

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

A) Transformer

B) Battery

C) Generator

D) Motor

Your score is

The average score is 23%

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