ELECTRICAL ENGINEERING QUESTIONS

1. The frequency of the rotor current in a 3 phase 50 Hz, 4 pole induction motor at full load speed is about 
a. 20 Hz. 
b. 2 Hz.
c. Zero.
d. 100 Hz

Answer: b. 2 Hz.

2. The current from the stator of an alternator is taken out to the external load circuit through 
a. Motor Connector
b. Solid connections.
c. Carbon brushes.
d. Slip rings.

Answer: b. Solid connections.

3..1 The two windings of a transformer is 
a. Conductively linked.
b. Mechanically linked
c. Inductively linked.
d. Electrically linked.

Answer: c. Inductively linked.


4. Out of the following methods of heating the one which is independent of supply frequency is 

a. Electric resistance heating 
b. Dielectric heating
c. Electric arc heating 
d. Induction based heating 

Answer: a. Electric resistance heating