A. Cast steel
B. Aluminium
C. Soft steel
D. Cast iron
Related Mcqs:
- The weight of copper of both armature and field windings decreases with __________ in number of poles?
A. increase
B. decrease
C. either of the above
D. none of the above - In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made____________?
A. equal to that of armature mmf
B. less in comparison with the armature mmf
C. large in comparison with the armature mmf
D. none of the above - Hot rolled sheets have ___________ value of permeability?
A. zero
B. low
C. high
D. none of the above - The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation?
A. minimum
B. maximum
C. nil
D. none of the above - The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation?
A. minimum
B. maximum
C. nil
D. none of the above - In D.C. machines, the ________ in field mmf results in increase in size and cost of machines?
A. increase
B. decrease
C. either of the above
D. none of the above - cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall______________?
A. Direct
B. Indirect
C. Conventional
D. Any of the above - A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?
A. 1 + 0.2 kVmm
B. 2 + 0.5 kVmm
C. 4 + 0.7 kV mm
D. 5 + 0.9 kV mm - Aluminium when adopted as a conductor material in __________ transformers, decreases the overall cost of the transformer?
A. small size
B. medium size
C. large size
D. any of the above size - The efficiency of a machine should be as ____________ as possible to reduce the operating cost?
A. high
B. low
C. either of the above
D. none of the above
