Category: Rectifiers and Converters

A. by means of a small auxiliary motor
B. from AC. side as induction motor
C. from D.C. side as D.C. motor
D. any of the above methods
E. none of the above methods

A. Telephones
B. Relays
C. Time switches
D. All of the above

A. 10 V
B. 30 V
C. 60 V
D. 100 V
E. 200 V

A. Six-phase
B. Three-phase
C. Two-phase
D. Single-phase

A. 25, 35
B. 40, 50
C. 60, 70
D. 75, 85

A. 25°C
B. 40°C
C. 60°C
D. 75°C

A. magnitude
B. polarity
C. phase
D. any of the above
E. none of the above

A. anode drop and cathode drop
B. anode drop and arc drop
C. cathode drop and arc drop
D. anode drop, cathode drop and arc drop

A. Voltage drop in transformer reactance
B. Voltage drop in resistance of transformer and smoothing chokes
C. Arc voltage drop
D. All of the above

A. it is light in weight and occupies small floor space
B. it has high efficiency
C. it has high overload capacity
D. it is comparatively noiseless
E. all of the above