A. case iron
B. carbon
C. silicon steel
D. stainless steel
Related Mcqs:
- Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?
A. 0.005 mm
B. 0.05 mm
C. 0.5 m
D. 5 m - In D.C. generators the pole shoes are fastened to the pole core by_____________?
A. rivets
B. counter sunk screws
C. brazing
D. welding - The armature core of a D.C. generator is usually made of__________________?
A. silicon steel
B. copper
C. non-ferrous material
D. cast-iron - D.C. generator generally preferred for charging automobile batteries is______________?
A. series generator
B. shunt generator
C. long shunt compound generator
D. any of’the above - According to Fleming’s right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of____________?
A. motion of conductor
B. lines of force
C. either of the above
D. none of the above - In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be__________________?
A. 4
B. 8
C. 16
D. 32 - A cumulatively compounded long shunt generator when operating as a motor would be____________?
A. cumulatively compounded long shunt
B. deferentially compounded long shunt
C. cumulatively compounded short shunt
D. differentially compounded short shunt - 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 - Following D.C. generator will be in a position to build up without any residual magnetism in the poles______________?
A. series generator
B. shunt generator
C. compound generator
D. self-excited generator - For both lap and wave windings, there are as many commutator bars as the number of_____________?
A. slots
B. armature conductors
C. winding elements
D. poles
