SSC JE Electrical / Mock Test Series : 1

Topic : Mixed Technical (Electrical Engg.)

No. of Question : 100

Type : MCQ

Time : 60 Minutes

1197

1 hours

Created on August 07, 2023 By

Electrical Notebook

SSC JE Electrical / Mock Test Series : 1

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. The power factor of an AC circuit lies between –

A) None of these

B) -1 and 1

C) 0 and 1

D) 0 and -1

2 / 100

Category: Basic Electricity

2. Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out?

A) Total current in the circuit will increase

B) The other two lamps will glow

C) All the three will glow

D) No bulb will glow

3 / 100

Category: AC Fundamental

3. The frequency of an alternating current is –

A) The speed with which the alternator runs

B) The number of waves passing through a point in one second

C) the number of electrons passing through a point in one second

D) The number of cycles generated in one minute

4 / 100

Category: Basic Electricity

4. Which of the following statements are true with regard to resistivity?

A) Resistance depends on the temperature

B) Resistivity depend on area of cross section

C) Resistance does not depend on the temperature

D) Resistivity depend on the length

5 / 100

Category: Basic Electricity

5. What is the value of x if the current in the circuit is 5 A?

A) 15 ohm

B) 55 ohm

C) 75 ohm

D) 25 ohm

6 / 100

Category: AC Fundamental

6. RMS value can be defined based on which of the following? –

A) Charge transfers

B) Current

C) Heating effect

D) Voltage

7 / 100

Category: AC Fundamental

7. The square waveform of current has following relation between R.M.S. value and average value –

A) R.M.S. value of current is less than average value

B) None

C) R.M.S. value of current is greater than average value

D) R.M.S. value is equal to average value

8 / 100

Category: AC Fundamental

8. The power factor of practical inductor is

A) Leading

B) Unity

C) Zero

D) Lagging

9 / 100

Category: Basic Electricity

9. S.I unit of Power is –

A) Watt-hr

B) Joule

C) Coulomb

D) Watt

10 / 100

Category: Magnetic Circuit

10. Statically induced E.M.F’s magnitude depends on the –

A) Flux magnitude

B) None

C) Coil resistance

D) Rate of change of flux

11 / 100

Category: Basic Electricity

11. The energy per unit charge is

A) Voltage

B) Current

C) Power

D) Work

12 / 100

Category: Magnetic Circuit

12. Magnetic field is proportional to the –

A) Speed of electric charges

B) all of these

C) direction of electric charges

D) Quality of electric charges

13 / 100

Category: Magnetic Circuit

13. Magnetic field has -

A) both magnitude & direction

B) none

C) Only direction

D) only magnitude

14 / 100

Category: Magnetic Circuit

14. S.I unit of Reluctance-

A) AT

B) N/Wb

C) AT/Wb

D) AT/m

15 / 100

Category: Basic Electricity

15. S.I unit of conductance is –

A) Mho-m

B) Ohm-m

C) Mho

D) Ohm

16 / 100

Category: Transformer

16. Transformer core are laminated in order to reduce –

A) Friction & windage loss

B) Core loss

C) Hysteresis loss

D) Eddy current loss

17 / 100

Category: AC Machines & Transformer

17. With the star delta starter the voltage across the motor winding at starting is –

A) 100%

B) 57.7%

C) 75%

D) 66.7%

18 / 100

Category: Circuit Theory & Network

18. What will be the Q-factor of a circuit, if power factor is 0.9?

A) 1.111

B) 1

C) 0.81

D) 0.111

19 / 100

Category: Magnetic Circuit

19. Which rule do we use to predict the direction of movement of a current carrying wire in a magnetic field?

A) Fleming's Left Hand Rule

B) Fleming's Right Hand Rule

C) Faraday's Left Hand Rule

D) Faraday's Right Hand Rule

20 / 100

Category: Basic Electricity

20. The Inductor doesn’t allow sudden changes in

A) Current

B) Voltage

C) Inductance

D) Resistance

21 / 100

Category: AC Fundamental

21. The alternative name/names for active power is/are –

A) True power

B) Average power

C) all of the above

D) Real power

22 / 100

Category: Basic Electricity

22. The insulating medium between the two plates of capacitor is known as __________

A) Dielectric

B) Capacitive medium

C) Conducting medium

D) Electrode

23 / 100

Category: Basic Electricity

23. The reciprocal of resistivity is________

A) Impedance

B) Conductivity

C) Conductance

D) Resistance

24 / 100

Category: Basic Electricity

24. To obtain a high value of capacitance, the permittivity of dielectric medium should be –

A) unity

B) Low

C) high

D) zero

25 / 100

Category: AC Fundamental

25. The peak value of a sine wave is 200 V. Its average value is –

A) 127.4 V

B) 200 V

C) 282.8 V

D) 141.4 V

26 / 100

Category: DC Machines

26. The direction of rotation of a dc motor is found out by

A) Flemmings Right hand rule

B) Left hand thumb rule

C) Pulm rule

D) Flemmings Left hand rule

27 / 100

Category: Circuit Theory & Network

27. The component of current which is in quadrature with supply voltage, is –

A) Active component of current

B) True component of current

C) Watt-less component of current

D) none

28 / 100

Category: Basic Electricity

28. The units for inductance is _________ and capacitance is ___________

A) Henry, Coulomb

B) Coulomb, Faraday

C) Faraday, Henry

D) Henry, Faraday

29 / 100

Category: Basic Electricity

29. When an alternating current passes through an Ohmic resistance the electrical power converted into heat is –

A) Apparent power

B) none of the above

C) Reactive power

D) True power

30 / 100

Category: AC Machines & Transformer

30. Transformer is a

A) Static device

B) AC Machine

C) DC Machine

D) Both A & C

31 / 100

Category: Basic Electricity

31. Materials which easily allow the passage of electric current are known as ______

A) Conductors

B) Insulators

C) Dielectrics

D) Semi-conductors

32 / 100

Category: AC Fundamental

32. The RMS value of a sine wave is 100 A. Its peak value is –

A) 141 A

B) 282.8 A

C) 150 A

D) 70.7 A

33 / 100

Category: Basic Electricity

33. The voltage across the open circuit is?

A) 0 V

B) 100 V

C) 90 V

D) Infinity

34 / 100

Category: Basic Electricity

34. What is the resistivity of Copper?

A) 2.7×10^-8 ohm-m

B) 1.59×10^-8 ohm-m

C) 7.3×10^-8 ohm-m

D) 5.35×10^-8 ohm-m

35 / 100

Category: Magnetic Circuit

35. Magnetic lines of forces –

A) intersect only in some special circumstances

B) never intersect

C) are not predictable

D) often intersect

36 / 100

Category: AC Fundamental

36. Sparking may occurs when a load is switched off due to the presence of –

A) High Inductance

B) High impedance

C) High capacitance

D) Low impedance

37 / 100

Category: Basic Electricity

37. The duty cycle of a pulse waveform with a pulse width of 10 µs and a period of 100 µs is 25%.

A) True

B) False

38 / 100

Category: Magnetic Circuit

38. The principle of electromagnetic induction was propounded by

A) Edison

B) Flemmings

C) Orsted

D) Faraday

39 / 100

Category: Basic Electricity

39. Three nos 6-ohm resistances are connected in delta. Value of resistances if connected in star –

A) 6 ohm

B) 9 ohm

C) 2 ohm

D) 18 ohm

40 / 100

Category: Basic Electricity

40. The formula used to find the capacitance C is __________

A) Q + v

B) Qv

C) Q/v

D) Q-v

41 / 100

Category: Basic Electricity

41. One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

A) 45°

B) 0°

C) None of the above

D) 40°

42 / 100

Category: Magnetic Circuit

42. The reciprocal of permeability is –

A) Conductivity

B) Resistivity

C) reluctivity

D) MMF

43 / 100

Category: Basic Electricity

43. Which is the most cost efficient connection?

A) Either series or parallel

B) Neither series nor parallel

C) Series

D) Parallel

44 / 100

Category: Basic Electricity

44. Which of the following statements are true with regard to resistance?

A) Resistance is inversely proportional to the length of the wire

B) Resistance is directly proportional to an area of cross section of the wire

C) Resistance is directly proportional to a length of the wire

D) Resistance is inversely proportional to the resistivity of the wire

45 / 100

Category: AC Fundamental

45. The length of a phasor represents the amplitude

A) False

B) True

46 / 100

Category: Magnetic Circuit

46. When a permanent magnet is cut half what will be the result?

A) Two single pole magnets, one with a north pole and one with a south pole

B) Two single pole magnets, each of the magnets only having north poles

C) The piece of metal will lose it magnetism

D) Two dipole magnets, each with a north and South Pole

47 / 100

Category: AC Fundamental

47. RMS value can be defined based on which of the following? –

A) Charge transfer

B) Heating effect

C) Voltage

D) Current

48 / 100

Category: Basic Electricity

48. The average half-cycle value of a sine wave with a 40 V peak is

A) 6.37 V

B) 14.14 V

C) 25.48 V

D) 50.96 V

49 / 100

Category: Basic Electricity

49. The unit of frequency is the hertz

A) False

B) True

50 / 100

Category: Basic Electricity

50. The capacitor doesn’t allow sudden changes in

A) Current

B) Voltage

C) Capacitance

D) Resistance

51 / 100

Category: Magnetic Circuit

51. Magnetic field strength is

A) N.i / L

B) N.ø/I

C) None of these

D) N.i

52 / 100

Category: DC Machines

52. Principle of dynamically induced E.M.F is used in a –

A) Transformer

B) Choke

C) Thermo-couple

D) Generator

53 / 100

Category: Magnetic Circuit

53. The unit of magnetic flux is –

A) Ampere turns

B) Henry

C) Tesla

D) Weber

54 / 100

Category: AC Fundamental

54. The frequency of an AC voltage,e= 100 cos 314t , will be –

A) 60 Hz

B) None

C) 50 Hz

D) 25 Hz

55 / 100

Category: Basic Electricity

55. Which, among the following is a unit for resistivity?

A) ohm-meter^2

B) ohm/meter^2

C) ohm-meter

D) ohm/meter

56 / 100

Category: Magnetic Circuit

56. Magnetic circuit is a closed path followed by –

A) Flux density

B) M.M.F

C) None of these

D) flux

57 / 100

Category: Circuit Theory & Network

57. Which of the following will not be affected due to change in R?

A) Q

B) Resonant frequency

C) None

D) Bandwidth

58 / 100

Category: Basic Electricity

58. Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out? –

A) Total current in the circuit will increase

B) all the three will glow

C) The other two lamps will glow

D) no bulb will glow

59 / 100

Category: AC Fundamental

59. The frequency of an AC voltage in India, is–

A) 314 Hz

B) 100 Hz

C) 50 Hz

D) 75 Hz

60 / 100

Category: Basic Electricity

60. Periodic is characterized by a repetition at fixed time intervals

A) True

B) False

61 / 100

Category: Magnetic Circuit

61. Which is the property of a coil by which a counter E.M.F is induced when the current through the coil changes?

A) None

B) Self-inductance

C) Mutual inductance

D) Capacitance

62 / 100

Category: Basic Electricity

62. What happens to the current in the series circuit if the resistance is doubled?

A) It becomes double its original value

B) It becomes half its original value

C) It becomes infinity

D) It becomes zero

63 / 100

Category: Basic Electricity

63. Resistance of any circuit depends on –

A) Directly proportionate with length and inversely proportionate with cross sectional area

B) Directly proportionate with length and cross sectional area

C) Inversely proportionate with length and directly proportionate with cross sectional area

D) Inversely proportionate with length and cross sectional area

64 / 100

Category: AC Fundamental

64. The equation for instantaneous value of alternating current is, then time period will be –

A) 0.06 sec

B) 0.01 sec

C) 0.05 sec

D) 0.04 sec

65 / 100

Category: Magnetic Circuit

65. The induced E.M.F. and current always oppose the cause of producing them is according to which law?

A) Newton

B) Lenz

C) Coulomb

D) Faraday

66 / 100

Category: AC Fundamental

66. RMS value can be defined based on which of the following? –

A) Heating effect

B) Voltage

C) Charge transfers

D) Current

67 / 100

Category: Basic Electricity

67. The total resistance between A and B are?

A) 5 ohm

B) 0 ohm

C) 20 ohm

D) 80 ohm

68 / 100

Category: Magnetic Circuit

68. Magnetic lines of forces –

A) Intersect only in some special circumstances.

B) Often intersect

C) Never intersect

D) Are not predictable

69 / 100

Category: Basic Electricity

69. The flow of electron in solids is due to –

A) electrons & ions

B) Atoms

C) electrons

D) positive charges

70 / 100

Category: Basic Electricity

70. The resistance of straight conductor is independent of-

A) Material

B) Shape of cross-section

C) Cross-sectional area

D) Temperature

71 / 100

Category: Basic Electricity

71. The expression for energy of an inductor

A) ½ L^2.I

B) ½ LI^2

C) ½ LI

D) L/2I

72 / 100

Category: Magnetic Circuit

72. Which of the following is unit less?

A) Moment of Magnet

B) Magnetic susceptibility

C) Permeability

D) Permittivity

73 / 100

Category: Basic Electricity

73. When a sine wave has a frequency of 100 Hz in 12 s it goes through

A) 1/100 cycle

B) 1,200 cycles

C) 12 cycles

D) 120 cycles

74 / 100

Category: Basic Electricity

74. The instantaneous value is the voltage or current value of a waveform at its peak

A) False

B) True

75 / 100

Category: Magnetic Circuit

75. Unit of magnetic flux density is in S.I.

A) Oersted

B) WB/m²

C) Both A & B

D) Tesla

76 / 100

Category: AC Fundamental

76. Two waves of the same frequency have opposite phase when the phase angle between them is –

A) 0°

B) 360°

C) 180°

D) 90°

77 / 100

Category: DC Machines

77. The direction of rotation of a dc generator is found out by

A) Flemmings Left hand rule

B) Flemmings Right hand rule

C) Palm rule

D) Left hand thumb rule

78 / 100

Category: AC Fundamental

78. Reactive power is the product of

A) V, I, cos ø

B) V, I, sin ø

C) V, I

D) V, I, tan ø

79 / 100

Category: AC Fundamental

79. The form factor for a sinusoidal a.c. voltage is –

A) 1.11

B) 1

C) 0.707

D) 1.41

80 / 100

Category: Basic Electricity

80. The current in each branch of a parallel circuit is proportional to _________

A) Proportional to the value of the resistors

B) The amount of time the circuit

C) Equal in all branches

D) Proportional to the power in the circuit

81 / 100

Category: Basic Electricity

81. Unit of resistivity is

A) Ohm-m

B) Ohm/m

C) Ohm-m²

D) Ohm

82 / 100

Category: DC Machines

82. Which of the following is used to determine the direction of rotation of D.C motor?

A) Thumb Rule

B) Fleming’s Left-hand Rule

C) Fleming’s Right-hand Rule

D) Lenz’s Law

83 / 100

Category: Magnetic Circuit

83. Strength of the electromagnet can be increased by increasing –

A) number of turns in the circuit

B) either b or c

C) Reluctance

D) Magnitude of current

84 / 100

Category: Basic Electricity

84. The voltage across the short is?

A) Infinity

B) 135 V

C) 11.25 V

D) Zero

85 / 100

Category: AC Fundamental

85. The power factor of an ordinary electric bulb is

A) Unity

B) Slightly less than unity

C) Zero

D) Slightly more than unity

86 / 100

Category: Basic Electricity

86. What is the relation between resistance R and resistivity ρ of a wire ?

A) R= l/( ρ.a)

B) R= ρ. (a/l)

C) R= a/( ρ.l)

D) R=ρ. (l/a)

87 / 100

Category: AC Fundamental

87. The most important advantage of using electrical energy in the form of a AC is –

A) The construction cost per kilowatt of AC generator is lower than that of DC generator

B) Transformation of voltage is possible in case of AC only

C) Less insulation is required in case of AC

D) Conductor of smaller x-section is required in case of AC in comparison to DC for carrying the same current

88 / 100

Category: Basic Electricity

88. Many resistors connected in series will?

A) Divide the voltage proportionally among all the resistor

B) Increase the source voltage in proportion to the values of the resistors

C) Divide the current proportionally

D) Reduce the power to zero

89 / 100

Category: Magnetic Circuit

89. What is the power in the magnetic field if the current in a coil has a constant inductance of L henrys grows at a uniform rate?

A) L / 2It

B) L / 2I^2 t

C) LI^2/ 2t

D) LI / 2t

90 / 100

Category: Basic Electricity

90. The currents in the three branches of a parallel circuit are 3 A, 4 A and 5 A. What is the current leaving it?

A) 12 A

B) 0 A

C) Insufficient data provide

D) The largest one among the three values

91 / 100

Category: Basic Electricity

91. What is the relation between resistance R and resistivity ρ of a wire ?

A) R= a/( ρ.l)

B) R=ρ. (l/a)

C) R= ρ. (a/l)

D) R= l/( ρ.a)

92 / 100

Category: AC Fundamental

92. Unit of impedance is

A) Mho

B) Henry

C) Ohm

D) Farad

93 / 100

Category: Basic Electricity

93. Three lamps are connected in parallel across the voltage source. What happen if one lamp will burn out? –

A) The other two lamps will glow

B) no bulb will glow

C) Total current in the circuit will increase

D) all the three will glow

94 / 100

Category: DC Machines

94. Which DC motor is preferred for wide range of speed regulation?

A) Differential motor

B) Compound motor

C) Shunt motor

D) Series motor

95 / 100

Category: Basic Electricity

95. Voltage across the 60 ohm resistor is______

A) 120 V

B) 48 V

C) 72 V

D) 0 V

96 / 100

Category: Magnetic Circuit

96. Paramagnetic materials are –

A) slightly attracted by a magnet

B) Strongly attracted by a magnet

C) strongly repelled by a magnet

D) none

97 / 100

Category: AC Fundamental

97. The energy stored by a capacitor is given by –

A) 1/2 CV^2

B) Q^2 / 2C

C) 1/2 QV

D) All of the above

98 / 100

Category: Basic Electricity

98. What is the RMS value of the current if the maximum value of sine wave current is 100 A?

A) 7.07 A

B) 70.72 A

C) 707.2 A

D) 100 A

99 / 100

Category: AC Fundamental

99. Real part and imaginary part of admittance are respectively –

A) Reluctance and Permeance

B) Conductance, Susceptance

C) Resistance and Reactance

D) Permeance and Susceptance

100 / 100

Category: Basic Electricity

100. What is the voltage measured across a series short?
a) b) c) d)

A) Zero

B) Infinite

C) Null

D) The value of the source voltage

Your score is

The average score is 29%

Related posts:

SSC JE Electrical / Mock Test Series : 3

RRB ALP & Technician CBT-1 | Mock Test Set : 2

SSC JE Electrical / Mock Test Series : 2

RRB ALP & Technician CBT-1 | Mock Test Set : 1

Leave a Comment Cancel Reply

Enjoy this blog? Please spread the word :)