Rectifiers And Converters — Part 1 MCQs with Explanations

All of the above is the correct answer to “In which of the following equipment direct current is needed”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

All of the above is the correct answer to “Mercury, in arc rectifiers, is chosen for cathode because”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

leakage reactance is the correct answer to “It is the_______of the transformer on which the magnitude of angle of overlap depends.”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Mercury arc rectifier is the correct answer to “Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

All of the above is the correct answer to “Which of the following is the loss within the mercury arc rectifier chamber”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

energy spent in overcoming the electrostatic field is the correct answer to “The voltage drop at anode, in a mercury arc rectifier is due to”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

60% is the correct answer to “The efficiency of an electrolytic rectifier is nearly”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

one armature and one field is the correct answer to “A rotary converter is a single machine with”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

accelerates is the correct answer to “In a grid control of mercury arc rectifiers when the grid is made positive relative to cathode, then it the electrons on their may to anode.”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Six-phase is the correct answer to “Which of the following mercury arc rectifier will deliver least undulating current”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

All of the above is the correct answer to “Which of the following methods may be used to convert A.C. system to D.C.”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Induction regulator is the correct answer to “In a phase-shift control method, the phase shift between anode and grid voltages can be achieved by means of”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

All of the above is the correct answer to “On which of the following factors the number of phases for which a rectifier should be designed depends”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

1700-2000 V is the correct answer to “With a motor converter it is possible to obtain D.C. voltage only upto”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

A synchronous motor is the correct answer to “A commutating rectifier consists of commutator driven by”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

is almost independent of load current is the correct answer to “In a mercury pool rectifier, the voltage drop across its electrodes”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

All of the above is the correct answer to “When a rectifier is loaded which of the following voltage drops take place”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

graphite is the correct answer to “In a mercury arc rectifier, the anode is usually made of”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Aluminium is the correct answer to “Which of the following metals is generally manufactured by electrolysis process”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

The rectifier will not operate is the correct answer to “If cathode and anode connections in a mercury arc rectifier are inter changed”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

an auxiliary electrode is used is the correct answer to “To produce cathode spot in a mercury arc rectifier”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

any of the above methods is the correct answer to “A synchronous converter can be started”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

two is the correct answer to “In a single phase rotary converter the number of slip rings will be”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Selenium rectifiers is the correct answer to “Which of the following rectifiers have been used extensively in supplying direct current for electroplating”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

One-third of a cycle is the correct answer to “In a three-phase mercury arc rectifiers each anode conducts for”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

5 to 10 per cent is the correct answer to “Ageing of a selenium rectifier may change the output voltage by”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

less is the correct answer to “In a rotary converter I2R losses as compared to a D.C. generator of the same size will be”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Electrolytic rectifiers is the correct answer to “Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

65 to 75% is the correct answer to “The efficiency of the copper oxide rectifier seldom exceeds”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

A synchronous motor and a D.C. generator is the correct answer to “A rotary converter combines the function of”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

500 A is the correct answer to “In a glass bulb mercury arc rectifier the maximum current rating is restricted to”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

any 'C. machine is the correct answer to “A rotary converter in general construction and design, is more or less like”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

100 V is the correct answer to “The applications of selenium rectifiers are usually limited to potential of”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Both (A) and (B) is the correct answer to “The metal rectifiers are preferred to valve rectifiers due to which of the following advantages”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

ionization is the correct answer to “In a mercury arc rectifier characteristic blue luminosity is due to”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

45°C is the correct answer to “Copper oxide rectifier is usually designed not to operate above”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

critical grid voltage is the correct answer to “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”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

All of the above is the correct answer to “Which of the following are the applications of D.C. system”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

500 A at 500 V is the correct answer to “Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of”. This question is standard in competitive examination syllabi for Rectifiers And Converters.

Synchronous motor is the correct answer to “Which of the following AC. motors is usually used in large motor-generator sets”. This question is standard in competitive examination syllabi for Rectifiers And Converters.