Rectifiers and Converters Ageing of a selenium rectifier may change the output voltage by None of the listed here 25 to 30 per cent 15 to 20 per cent 5 to 10 per cent None of the listed here 25 to 30 per cent 15 to 20 per cent 5 to 10 per cent ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters A mercury arc rectifier possesses ________ regulation characteristics exponential none of the listed here straight line curved line exponential none of the listed here straight line curved line ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In which of the following applications, direct current is absolutely essential ? Variable speed operation Electrolysis Illumination Traction Variable speed operation Electrolysis Illumination Traction ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 80 to 85% 65 to 75% 90 to 95% 85 to 90% 80 to 85% 65 to 75% 90 to 95% 85 to 90% ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required? Motor converter Mercury arc rectifier Motor-generator set Rotary converter Motor converter Mercury arc rectifier Motor-generator set Rotary converter ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Which of the following is the loss within the mercury arc rectifier chamber? Voltage drop at the anode Voltage drop in arc Voltage drop at the cathode All of the listed here Voltage drop at the anode Voltage drop in arc Voltage drop at the cathode All of the listed here ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS