In a single phase rotary converter the number of slip rings will be Six Four Three Two TRUE ANSWER : ? YOUR ANSWER : ?
A commutating rectifier consists of commutator driven by An induction motor A D.C. shunt motor A synchronous motor A D.C. series motor TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following metals is generally manufactured by electrolysis process? Aluminium Load Zinc Copper TRUE ANSWER : ? YOUR ANSWER : ?
A rotary converter is a single machine with none of the listed here two armatures and one field one armature and one field one armature and two fields TRUE ANSWER : ? YOUR ANSWER : ?
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 critical grid voltage non of the listed here maximum grid voltage all of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
A mercury arc rectifier possesses ________ regulation characteristics none of the listed here straight line curved line exponential TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is the loss within the mercury arc rectifier chamber? Voltage drop at the cathode Voltage drop at the anode All of the listed here Voltage drop in arc TRUE ANSWER : ? YOUR ANSWER : ?
On which of the following factors the number of phases for which a rectifier should be designed depends? The voltage regulation of the rectifier should be low The power factor of the system should be high In the output circuit there should be no harmonics All of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
A synchronous converter can be started from D.C. side as D.C. motor by means of a small auxiliary motor All of the listed here from A.C. side as induction motor TRUE ANSWER : ? YOUR ANSWER : ?
In phase-shift control method the control is carried out by varying the of grid voltage. All of the listed here phase polarity magnitude TRUE ANSWER : ? YOUR ANSWER : ?