Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 85 to 90% 80 to 85% 65 to 75% 90 to 95% 85 to 90% 80 to 85% 65 to 75% 90 to 95% ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The ignited or auxiliary anode in mercury arc rectifier is made of Graphite Boron carbide Aluminium Copper Graphite Boron carbide Aluminium Copper ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Copper oxide rectifier is usually designed not to operate above 55°C 45°C 30°C 75°C 55°C 45°C 30°C 75°C ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ? They do not require any voltage for filament heating None of the listed here They are mechanically strong Both of the listed here They do not require any voltage for filament heating None of the listed here They are mechanically strong Both of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters A commutating rectifier consists of commutator driven by An induction motor A D.C. series motor A synchronous motor A D.C. shunt motor An induction motor A D.C. series motor A synchronous motor A D.C. shunt motor ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The advantage of mercury arc rectifier is that it is comparatively noiseless it is light in weight and occupies small floor space All of the listed here it has high efficiency it is comparatively noiseless it is light in weight and occupies small floor space All of the listed here it has high efficiency ANSWER DOWNLOAD EXAMIANS APP
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