Rectifiers and Converters Which of the following rectifiers have been used extensively in supplying direct current for electroplating? Selenium rectifiers Copper oxide rectifiers Mercury arc rectifiers Mechanical rectifiers Selenium rectifiers Copper oxide rectifiers Mercury arc rectifiers Mechanical rectifiers ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Which of the following methods may be used to convert A.C. system to D.C.? All of the listed here Motor converters Rectifiers Rotary converters All of the listed here Motor converters Rectifiers Rotary converters ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of 400 A at 400 V 500 A at 500 V 300 A at 300 V 100 A at 100 V 400 A at 400 V 500 A at 500 V 300 A at 300 V 100 A at 100 V ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following anode drop, cathode drop and arc drop anode drop and cathode drop cathode drop and arc drop anode drop and arc drop anode drop, cathode drop and arc drop anode drop and cathode drop cathode drop and arc drop anode drop and arc drop ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The efficiency of the copper oxide rectifier seldom exceeds 85 to 90% 90 to 95% 65 to 75% 80 to 85% 85 to 90% 90 to 95% 65 to 75% 80 to 85% ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In mercury arc rectifiers having grid, the arc can be struck between anode and cathode only when the grid attains a certain potential, this potential being known as maximum grid voltage critical grid voltage all of the listed here non of the listed here maximum grid voltage critical grid voltage all of the listed here non of the listed here ANSWER DOWNLOAD EXAMIANS APP
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