A. low voltage transformers
B. medium voltage transformers
C. high voltage transformers
D. any of the above
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
A. Natural graphite
B. Hard carbon
C. Electro graphitic
D. Metal graphite
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
A. purely D.C. control systems
B. purely AC. control systems
C. both D.C. and AC. control systems
D. none of the above
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
A. main poles
B. interpoles
C. frame
D. all of the above
A. Mild steel
B. Copper
C. Aluminium
D. Cast-iron