What increases the series field of a short-shunt DC generator ?
A. shunt current
B. load current
C. external current
D. armature current
DC Generators
D.C Generators Mcqs
If they must run in parallel, which of the following generators will be preferred ?
A. Shunt generators
B. Compound generators
C. Both a and b
D. None of above
What is the purpose of lap winding in D.C. generators ?
A. low voltage, high current
B. low voltage, low current
C. high voltage, high current
D. high voltage, low current
What is the equivalent of tappings per equilizer ring ?
A. number of parallel paths
B. number of commutator segments
C. number of pole pairs
D. number of poles
When the next DC generator builds up, the poles will not have any residual magnetism, right ?
A. self-excited generator
B. compound generator
C. series generator
D. shunt generator
The full load terminal voltage of a level compounded D.C. generator is called ?
A. more than no-load terminal voltage
B. less than no-load terminal voltage
C. negligibly low
D. equal to no-load terminal voltage
The armature core of a D.C. generator is usually made of:
A. cast-iron
B. silicon steel
C. copper
D. non-ferrous material
The resistance of a D.C. generator is known to as the critical resistance.
A. field
B. load
C. brushes
D. armature
What can be done to increase the critical resistance in a D.C. generator ?
A. increasing its speed
B. decreasing its speed
C. increasing is field resistance
D. decreasing its field resistance
When does the magnetic neutral axis in a D.C. generator coincide with the geometrical neutral axis ?
A. the generator runs on overload
B. the generator runs on designed speed
C. the generator runs on full load
D. there is no load on the generator