Top Electrical Engg MCQ - 500+ MCQ
101
Determine the secondary voltage (in V) of a potential transformer, when the value of the system voltage is 6600 V, the turn ratio of the potential transformer is 107 and the percentage voltage error of the transformer is 7%.
102
The base or radix of the hexadecimal number system is:
103
8. If the area of cross-section is reduced to half of its original value, then what will happen to the flux density?
104
Dummy coils are used for
105
Therefore, s = (Ns - 0) / Ns = 1. 54. The primary function of a surge arrester (lightning arrester) in a power system is to:
106
In a 3-phase 4-wire cable, the cross-sectional area of neutral conductor is
107
A single-phase induction motor with only the main winding excited would exhibit the following response at synchronous speed
108
Which of the following quantities cannot be measured using a multimeter?
109
The conductivity of silicon can be expected around:
110
What will be the self-inductance (in H) of a 2 m long air-core solenoid, if the diameter of the solenoid is 25 cm and has 600 turns?
111
Determine the potential difference (in V) between the ends of a conductor when the conductor has a conductance of 0.4 Siemens and carrying a current of 8 A.
112
The phase angle is φ = cos⁻¹(0.6) = 53.13°. The reactive power is Q = S × sin(φ). So, Q = 120 VA × sin(53.13°) = 120 × 0.8 = 96 VAR. Q124: Determine the secondary voltage (in V) of a potential transformer, when the value of the system voltage is 6600 V, the turn ratio of the potential transformer is 107 and the percentage voltage error of the transformer is 7%.
113
The size of neutral wire as compared to that of line wire should be in case of single phase supply
114
The parts of the armature electric circuit which take active part in e.m.f. generation are ____.
115
A wire of 30 ohms resistance is stretched to double its original length and then cut into two equal parts. These two equal parts are connected in parallel with a battery that draws a current of 2 A. Determine the potential difference (in V) between the terminals of the battery.
116
Fuse is always made up of alloys and metals having
117
Why is electric braking preferred?
118
Which one of the following statement is TRUE about reluctance?
119
In a vapour compression system, which of the following units is adversely affected by the presence of moisture?
120
The direction of rotation of universal motor can be reversed by reversing the flow of current through ____.