Electrical Engineering Interview Questions on DC Machine – 2
1. Which material is used to made the yoke of a d.c. machine?
Answer: Generally, cast steel is used to made the yoke of a d.c. machine.
2. Which material is used to make the armature of a d.c. machine?
Answer: Generally, laminated Silicon steel is used to make the armature of a d.c. machine.
3. Why the armature winding of d.c. machine is placed on the rotor?
Answer: The armature winding of a d.c. machine is placed on the rotor to facilitate commutation.
4. Generator voltage of a d.c. generator Depends on which factors?
Answer: The generated voltage of a DC generator depends upon speed and flux.
5. How many magnetic circuits will be in 4-pole d.c. machines?
Answer: A 4-pole d.c. machine has 4 magnetic circuits.
6. What are the stray losses in a d.c. machine?
Answer: Iron losses and mechanical losses together are called stray losses.