Multiple Choice Questions on Basic Electrical Engineering

1-Which of the following motors is used in ceiling fan?
(A) Universal motor
(B) Synchronous motor
(C) Series motor
(D) Induction motor
2-Number of parallel path in wave winding is:
(A) 2
(B) 3
(C) 4
(D) 6
3-CT is used for measuring
(A) Voltage
(B) Frequency
(C) Power factor
(D) Alternating current
4-Active power in 3 phase circuit is:
(A) √3 V_LI_L Cosφ
(B) 3 V_LI_L Cosφ
(C) √2 V_LI_L Cosφ
(D) 2 V_LI_L Cosφ
5-Zener diodes are commonly used as:
(A) Rectifier
(B) Amplifier
(C) Voltage regulator
(D) Filter
6-Unit of reluctance:
(A) Ampere Turns/Weber
(B) Weber Turns
(C) Henry
(D) Weber Turns/Ampere
7-Unit of luminous intensity is
(A) Lumen
(B) Lux
(C) Lumen/m²
(D) Candela
8-Which of the following is secondary cell?
(A) Dry cell
(B) Leclanche cell
(C) Voltaic cell
(D) Lead acid cell
9-Energy stored in inductor is:
(A) W = (1/4)LI²
(B) W = (1/2)LI²
(C) W = (1/2)L²I
(D) W = (1/2)L²I²
10-The power factor of pure resistive circuit is
(A) Zero
(B) Leading
(C) Lagging
(D) Unity
ANSWERS:
1-(D), 2-(A), 3-(D), 4-(A), 5-(C), 6-(A), 7-(D), 8-(D), 9-(B), 10-(D)