DC Generators - Interview Questions | Exam2Win

Take a timed mock test specifically for DC Generators.

36. The voltage drop for which of the following types of brush can be expected to be least ?

A. Graphite brushes

B. Carbon brushes

C. Metal graphite brushes

D. None of the above

Explanation:

37. For a D.C. machines laboratory following type of D.C. supply will be suitable

A. rotary converter

B. mercury are rectifier

C. induction motor D.C. generator set

D. synchronous motor D.C. generator set

Explanation:

38. The number of brushes in a commutator depends on

A. speed of armature

B. type of winding

C. voltage

D. amount of current to be collected

Explanation:

39. Which of the following statement about D.C. generators is false ?

A. Compensating winding in a D.C. machine helps in commutation

B. In a D. C. generator interpoles winding is connected in series with the armature winding

C. Back pitch and front pitch are both odd and approximately equal to the pole pitch

D. Equilizing bus bars are used with parallel running of D.C. shunt generators

Explanation:

40. The demagnetising component of armature reaction in a D.C. generator

A. reduces generator e.m.f.

B. increases armature speed

C. reduces interpoles flux density

D. results in sparking trouble

Explanation: