A. 1 + 0.2 kVmm
B. 2 + 0.5 kVmm
C. 4 + 0.7 kV mm
D. 5 + 0.9 kV mm
A. low voltage transformers
B. medium voltage transformers
C. high voltage transformers
D. any of the above
The surge phenomenon is particularly important in case of_______________? Read More »
Electrical Machine Design A. minor insulation
B. major insulation
C. either of the above
D. none of the above
A. Radial
B. Trailing
C. Reaction
D. All of the above
____________ is the common method of applying brushes to the commntator? Read More »
Electrical Machine Design A. Natural graphite
B. Hard carbon
C. Electro graphitic
D. Metal graphite
___________ brushes are fragile and cause excessive wear of commutator? Read More »
Electrical Machine Design A. 0.1 to 0.2 mm
B. 0.2 to 0.3 mm
C. 0.3 to 0.4 mm
D. 0.4 to 0.5 mm
The laminations of the armature of a D.C. machine are usually ___________ thick? Read More »
Electrical Machine Design A. purely D.C. control systems
B. purely AC. control systems
C. both D.C. and AC. control systems
D. none of the above
D.C. servomotors are used in______________? Read More »
Electrical Machine Design A. upto 20 A
B. upto 40 A
C. upto 60 A
D. upto 80 A
A. Traction
B. Drives for process industry
C. Battery driven vehicles
D. Automatic control
E. All of the above
Which of the following in an application of D.C. motors? Read More »
Electrical Machine Design A. main poles
B. interpoles
C. frame
D. all of the above
The stator of a D.C. machine comprises of_____________? Read More »
Electrical Machine Design