Rectifiers and Converters

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

A. an induction motor
B. a synchronous motor
C. a D.C. series motor
D. a D.C. shunt motor

A. copper
B. aluminium
C. silver
D. graphite
E. tungsten

A. Copper oxide rectifiers
B. Selenium rectifiers
C. Mercury arc rectifiers
D. Mechanical rectifiers
E. None of the above

A. Voltage drop in arc
B. Voltage drop at the anode
C. Voltage drop at the cathode
D. All of the above

A. Mechanical rectifiers
B. Copper oxide rectifiers
C. Selenium rectifiers
D. Electrolytic rectifiers
E. Mercury arc rectifiers

A. 80%
B. 70%
C. 60%
D. 40%

A. graphite
B. boron carbide
C. aluminium
D. copper