Which of the following methods may be used to convert A.C. system to D.C.? Motor converters All of the listed here Rotary converters Rectifiers TRUE ANSWER : ? YOUR ANSWER : ?
Copper oxide rectifier is usually designed not to operate above 30°C 75°C 55°C 45°C TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following metals is generally manufactured by electrolysis process? Copper Aluminium Load Zinc TRUE ANSWER : ? YOUR ANSWER : ?
It is the_______of the transformer on which the magnitude of angle of overlap depends. capacitance resistance all of the listed here leakage reactance TRUE ANSWER : ? YOUR ANSWER : ?
If cathode and anode connections in a mercury arc rectifier are inter changed The rectifier will not operate Both ion and electron streams will move in the same direction Internal losses will be reduced The rectifier will operate at reduced efficiency TRUE ANSWER : ? YOUR ANSWER : ?
The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following cathode drop and arc drop anode drop, cathode drop and arc drop anode drop and arc drop anode drop and cathode drop TRUE ANSWER : ? YOUR ANSWER : ?
A mercury arc rectifier possesses ________ regulation characteristics straight line exponential none of the listed here curved line TRUE ANSWER : ? YOUR ANSWER : ?
Mercury, in arc rectifiers, is chosen for cathode because Its atomic weight is quite high All of the listed here Its ionization potential is relatively low Its boiling point and specific heat are low TRUE ANSWER : ? YOUR ANSWER : ?
The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ? They are mechanically strong They do not require any voltage for filament heating None of the listed here Both of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is reversible in action? All of the listed here Motor generator set Rotary converter Motor converter TRUE ANSWER : ? YOUR ANSWER : ?