SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

154

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

A) I max Lm value

B) None

C) I average value

D) I R.M.S.

2 / 100

Category: AC Fundamental

2. Form factor of square wave is-

A) 1

B) 1.47

C) 1.41

D) 2

3 / 100

Category: AC Fundamental

3. Average power taken by a pure capacitor is –

A) Minimum

B) Zero

C) Maximum

D) Unity

4 / 100

Category: Basic Electricity

4. Instantaneous power in inductor is proportional to the –

A) Square of rate of change of current

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

C) Square of instantaneous current

D) Temperature of the inductor

5 / 100

Category: Basic Electricity

5. Electric pressure is also called –

A) Voltage

B) Energy

C) Conductance

D) Resistance

6 / 100

Category: Magnetic Circuit

6. 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) Lesser its Weber-turns

D) lower the E.M.F. induced

7 / 100

Category: Basic Electricity

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

A) True

B) False

8 / 100

Category: Basic Electricity

8. In a pure inductive circuit current is

A) Leads by voltage by 90°

B) Leads by voltage by 0°

C) Lags by voltage by 0°

D) Lags behind Voltage by 90°

9 / 100

Category: Magnetic Circuit

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

A) Magnetomotive force

B) voltage

C) Electromotive difference

D) Electromotive force

10 / 100

Category: Basic Electricity

10. 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

11 / 100

Category: AC Fundamental

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

A) capacitance & supply frequency is more

B) Capacitance is more & supply frequency is less

C) capacitance is less & supply frequency is more

D) Capacitance & supply frequency is less

12 / 100

Category: AC Fundamental

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

A) π Hz

B) None

C) 1 Hz

D) 2π Hz

13 / 100

Category: Basic Electricity

13. 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) 50625 W

D) 50.625 W

14 / 100

Category: AC Fundamental

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

A) L only

B) C only

C) R only

D) R-L-C all

15 / 100

Category: Basic Electricity

15. Calculate the equivalent resistance between A and B

A) 4 ohm

B) 2 ohm

C) 6 ohm

D) 8 ohm

16 / 100

Category: Basic Electricity

16. Calculate the equivalent resistance between A and B

A) 26.67 ohm

B) 46.67 ohm

C) 6.67 ohm

D) 10.67 ohm

17 / 100

Category: AC Fundamental

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

A) Vr /V

B) P/S

C) R/Z

D) All of the above

18 / 100

Category: Magnetic Circuit

18. 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) Remain the same

C) initially increase and then decrease

D) decrease

19 / 100

Category: Basic Electricity

19. 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

20 / 100

Category: Magnetic Circuit

20. Hysteresis loss least depends on –

A) ambient temperature

B) steinmetz coefficient of material

C) frequency

D) volume of material

21 / 100

Category: Basic Electricity

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

A) Black Brown Black Silver

B) Brown Black Golden Golden

C) Black Brown Black Golden

D) Brown Black Golden Silver

22 / 100

Category: Basic Electricity

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

A) Neither series nor parallel

B) Parallel

C) Series

D) Either series or parallel

23 / 100

Category: Magnetic Circuit

23. 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/2

C) I/4

D) I

24 / 100

Category: Circuit Theory & Network

24. Battery is a

A) DC Source

B) Both of the above

C) AC Sorce

D) None of the above

25 / 100

Category: Magnetic Circuit

25. 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) halved

C) Unaffected

D) doubled

26 / 100

Category: Basic Electricity

26. Ideal voltage source has-

A) High internal resistance

B) Zero internal resistance

C) Low internal resistance

D) Infinity internal resistance

27 / 100

Category: Circuit Theory & Network

27. In any AC circuit always –

A) Apparent power is more than actual power

B) Actual power is more than reactive power

C) Reactive power is more than actual power

D) Reactive power is more than apparent power

28 / 100

Category: Basic Electricity

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

A) A normal capacitor as in AC

B) Open circuit

C) A resistor

D) A short circuit

29 / 100

Category: Basic Electricity

29. Calculate the total current in the circuit

A) 15 A

B) 11.43 A

C) 10 A

D) 20 A

30 / 100

Category: Basic Electricity

30. 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

31 / 100

Category: AC Fundamental

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

A) Vr /V

B) All of the above

C) R/Z

D) P/S

32 / 100

Category: Magnetic Circuit

32. In a electric circuit MMF is similar to

A) Current

B) Resistance

C) Electromotive force

D) Flux

33 / 100

Category: Basic Electricity

33. Electrolysis is possible with –

A) A.C supply only

B) both A.C and D.C supply

C) D.C supply only

D) none

34 / 100

Category: Magnetic Circuit

34. 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/2

C) I

D) I/4

35 / 100

Category: AC Fundamental

35. Capacitors for power factor correction are rated in -

A) KVA

B) KW

C) VA

D) KVAR

36 / 100

Category: Basic Electricity

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

A) -1

B) 1

C) Infinity

D) 0

37 / 100

Category: Basic Electricity

37. 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 glows with increased brightness

D) The other bulb stops glowing

38 / 100

Category: Magnetic Circuit

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

A) molecular friction

B) rapid reversals of its magnetisation

C) its high retentivity

D) flux density lagging behind magnetising force

39 / 100

Category: Basic Electricity

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

A) 6°

B) 27°

C) 60°

D) 180°

40 / 100

Category: Basic Electricity

40. Calculate the resistance between A and B

A) 29.69 ohm

B) 14.26 ohm

C) 3.56 ohm

D) 7 ohm

41 / 100

Category: Magnetic Circuit

41. 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) 150 J

D) 190 J

42 / 100

Category: Basic Electricity

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

A) Current

B) Neither voltage nor current

C) Both voltage and current

D) Voltage

43 / 100

Category: Basic Electricity

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

A) 26 V

B) None of the above

C) 13 V

D) 6.5 V

44 / 100

Category: Basic Electricity

44. Frequency of Direct Current is

A) 50 Hz

B) 0 Hz

C) 50 kHz

D) 40 Hz

45 / 100

Category: Basic Electricity

45. In case of D.C –

A) Magnitude and direction remains constant

B) Direction of current changes with time

C) Magnitude of current changes with time

D) Magnitude and direction both change with time

46 / 100

Category: Basic Electricity

46. Ideal voltage source has-

A) Zero internal resistance

B) Low internal resistance

C) Infinity internal resistance

D) High internal resistance

47 / 100

Category: Basic Electricity

47. Calculate the equivalent resistance between A and B

A) 48 ohm

B) 15 ohm

C) 60 ohm

D) 12 ohm

48 / 100

Category: AC Fundamental

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

A) both a and b

B) electric field

C) Magnetic field

D) none

49 / 100

Category: Basic Electricity

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

A) 8 times

B) 4 times

C) 32 times

D) 16 times – of the previous

50 / 100

Category: Magnetic Circuit

50. 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) 2.5 V

C) 3.5 V

D) 5 V

51 / 100

Category: AC Fundamental

51. 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

52 / 100

Category: AC Fundamental

52. 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) 2 ohm

C) 14 ohm

D) 2 ohm

53 / 100

Category: Magnetic Circuit

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

A) Electromagnetism field

B) Electromagnets

C) Electric magnets

D) Electromagnetic fields

54 / 100

Category: Magnetic Circuit

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

A) Current

B) Voltage drop

C) Emf

D) None

55 / 100

Category: Magnetic Circuit

55. An open coil has –

A) Zero resistance and high inductance

B) Zero resistance and inductance

C) Infinite resistance and normal inductance

D) Infinite resistance and zero inductance

56 / 100

Category: AC Fundamental

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

A) High power factor

B) Maximum load current

C) Low efficiency

D) Unity power factor

57 / 100

Category: Basic Electricity

57. KWh is the unit of -

A) Efficiency

B) Energy

C) Work

D) Power

58 / 100

Category: AC Fundamental

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

A) 1.11

B) 0.707

C) 1.414

D) 0.637

59 / 100

Category: Circuit Theory & Network

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

A) Zero

B) Minimum

C) a very small amount

D) Maximum

60 / 100

Category: Circuit Theory & Network

60. 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

61 / 100

Category: AC Fundamental

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

A) R only

B) L only

C) R-L-C all

D) C only

62 / 100

Category: AC Fundamental

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

A) All of these

B) C only

C) L only

D) R only

63 / 100

Category: DC Machines

63. 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

64 / 100

Category: AC Fundamental

64. 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 lags the voltage across L by 90°

C) Voltage across R and L are in phase

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

65 / 100

Category: Circuit Theory & Network

65. 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

66 / 100

Category: Basic Electricity

66. Find the voltage across the 6 ohm resistor

A) 54.48 V

B) 181.6 V

C) 27.27 V

D) 150 V

67 / 100

Category: Basic Electricity

67. 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

68 / 100

Category: AC Fundamental

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

A) 90° leads the current

B) lags the current

C) leads the current

D) 90° lags the current

69 / 100

Category: Basic Electricity

69. Insulating material can –

A) Protect a short circuit between two conductors

B) Conduct very large current

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

D) Store varying voltage

70 / 100

Category: Magnetic Circuit

70. 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) 90 J

C) 15 J

D) 60 J

71 / 100

Category: Basic Electricity

71. 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

72 / 100

Category: Magnetic Circuit

72. 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) Produce current opposite to the increasing current

C) Aid the applied voltage

D) Aid the increasing current

73 / 100

Category: Basic Electricity

73. Calculate the current across the 20 ohm resistor

A) 36.67 A

B) 10 A

C) 6.67 A

D) 20 A

74 / 100

Category: AC Fundamental

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

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

75 / 100

Category: Transformer

75. 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) 5 A, 125 A

D) 100 A, 25A

76 / 100

Category: Basic Electricity

76. 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) 1 mA

C) 10 mA

D) 15 mA

77 / 100

Category: Magnetic Circuit

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

A) LI^2

B) L^2 I / 2

C) IL^2

D) LI^2 / 2

78 / 100

Category: Basic Electricity

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

A) Short

B) Open

C) Non-polar

D) Polar

79 / 100

Category: Basic Electricity

79. 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 stops glowing

D) The other bulb glows with increased brightness

80 / 100

Category: AC Fundamental

80. 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 resist the flow of current

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

D) Reactive power in a circuit

81 / 100

Category: Basic Electricity

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

A) The same for all resistors

B) Is divided proportionally across all resistors

C) Is zero for all resistors

D) Is divided equally among all resistors

82 / 100

Category: Basic Electricity

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

A) 0.707

B) 1.414

C) 0.637

D) 1.11

83 / 100

Category: AC Fundamental

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

A) Not a sinusoid

B) A sinusoid of the same frequency

C) A sinusoid of double the frequency

D) A sinusoid of half the original frequency

84 / 100

Category: Basic Electricity

84. Batteries are generally connected in______

A) Either series or parallel

B) Neither series nor parallel

C) Parallel

D) Series

85 / 100

Category: AC Fundamental

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

A) Heating effect

B) Charge transfer

C) Current

D) Voltage

86 / 100

Category: Basic Electricity

86. Find the current in the circuit.

A) 4 A

B) 2 A

C) 3 A

D) 1 A

87 / 100

Category: AC Fundamental

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

A) All of the above

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

C) R/Z

D) Vr/V

88 / 100

Category: AC Fundamental

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

A) Lagging

B) leading

C) unity

D) zero

89 / 100

Category: AC Fundamental

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

A) 0.707

B) 1.414

C) 1.11

D) 0.637

90 / 100

Category: AC Machines & Transformer

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

A) Motor

B) Generator

C) Transformer

D) Battery

91 / 100

Category: Basic Electricity

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

A) Parallel

B) Neither series nor parallel

C) Series

D) Either series or parallel

92 / 100

Category: AC Fundamental

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

A) R/Z

B) All of these

C) Vr/V

D) P/S

93 / 100

Category: Basic Electricity

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

A) Both series and parallel

B) Series

C) Neither series nor parallel

D) Parallel

94 / 100

Category: Basic Electricity

94. 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) 7:5

C) 5:7

D) 2:5

95 / 100

Category: AC Fundamental

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

A) 0.707

B) 0.637

C) 1.11

D) 1.414