Rectifiers and Converters Which of the following rectifiers have been used extensively in supplying direct current for electroplating? Mercury arc rectifiers Copper oxide rectifiers Mechanical rectifiers Selenium rectifiers Mercury arc rectifiers Copper oxide rectifiers Mechanical rectifiers Selenium rectifiers ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters Which of the following AC. motors is usually used in large motor-generator sets? Squirrel cage induction motor Synchronous motor Slip ring induction motor Any of the listed here Squirrel cage induction motor Synchronous motor Slip ring induction motor Any of the listed here ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The potential drop in the arc, in a mercury arc rectifier, varies none of the listed here 2 V to 3.5 V per cm length of the arc 0.05 V to 0.2 V per cm length of the arc 0.5 V to 1.5 V per cm length of the arc none of the listed here 2 V to 3.5 V per cm length of the arc 0.05 V to 0.2 V per cm length of the arc 0.5 V to 1.5 V per cm length of the arc ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters In a three-phase mercury arc rectifiers each anode conducts for One-half a cycle One-fourth of a cycle Two-third of a cycle One-third of a cycle One-half a cycle One-fourth of a cycle Two-third of a cycle One-third of a cycle ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters The cathdde voltage drop, in a mercury arc rectifier, is due to expenditure of energy in ionization expenditure of energy in liberating electrons from the mercury surface resistance expenditure of energy in overcoming the electrostatic field expenditure of energy in ionization expenditure of energy in liberating electrons from the mercury surface resistance expenditure of energy in overcoming the electrostatic field ANSWER DOWNLOAD EXAMIANS APP
Rectifiers and Converters To produce cathode spot in a mercury arc rectifier an auxiliary electrode is used tube is evacuated low mercury vapour pressures are used anode is heated an auxiliary electrode is used tube is evacuated low mercury vapour pressures are used anode is heated ANSWER DOWNLOAD EXAMIANS APP
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