A. 2000 A
B. 1500 A
C. 1000 A
D. 500 A
A. colour of mercury
B. ionization
C. high temperature
D. electron streams
In a mercury arc rectifier characteristic blue luminosity is due to_____________? Read More »
Rectifiers and Converters 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
When a rectifier is loaded which of the following voltage drops take place ? Read More »
Rectifiers and Converters A. Six-phase
B. Three-phase
C. Two-phase
D. Single-phase
Which of the following mercury arc rectifier will deliver least undulating current? Read More »
Rectifiers and Converters A. one-third of a cycle
B. one-fourth of a cycle
C. one-half a cycle
D. two-third of a cycle
In a three-phase mercury arc rectifiers each anode conducts for____________? Read More »
Rectifiers and Converters A. ions
B. electrons
C. ions and electrons
D. any of the above
In a mercury arc rectifier________ flow from anode to cathode Read More »
Rectifiers and Converters A. straight line
B. curved line
C. exponential
D. none of the above
A mercury arc rectifier possesses __________ regulation characteristics Read More »
Rectifiers and Converters A. accelerates
B. decelerates
C. any of the above
D. none of the above
A. The voltage regulation of the rec¬tifier should be low
B. In the output circuit there should be no harmonics
C. The power factor of the system should be high
D. The rectifier supply transformer should be utilized to the best ad-vantage
E. all of the above
A. resistance
B. capacitance
C. leakage reactance
D. any of the above
It is the_________of the transformer on which the magnitude of angle of overlap depends? Read More »
Rectifiers and Converters