Rectifiers & Converters Mcqs Start Creating PDF

MCQ: The ignited or auxiliary anode in mercury arc rectifier is made of____________?

1. graphite
2. boron carbide
3. aluminium
4. copper

MCQ: The efficiency of an electrolytic rectifier is nearly____________?

1. 80%
2. 70%
3. 60%
4. 40%

MCQ: Which of the following rectifiers are primarily used for charging of low voltage batteries from AC supply ?

1. Mechanical rectifiers
2. Copper oxide rectifiers
3. Selenium rectifiers
4. Electrolytic rectifiers
5. Mercury arc rectifiers

MCQ: Which of the following is the loss within the mercury arc rectifier chamber ?

1. Voltage drop in arc
2. Voltage drop at the anode
3. Voltage drop at the cathode
4. All of the above

MCQ: Which of the following rectifiers have been used extensively in supplying direct current for electroplating ?

1. Copper oxide rectifiers
2. Selenium rectifiers
3. Mercury arc rectifiers
4. Mechanical rectifiers
5. None of the above

MCQ: In a mercury arc rectifier, the anode is usually made of_____________?

1. copper
2. aluminium
3. silver
4. graphite
5. tungsten

MCQ: A commutating rectifier consists of commutator driven by___________?

1. an induction motor
2. a synchronous motor
3. a D.C. series motor
4. a D.C. shunt motor

MCQ: In selenium rectifiers efficiencies ranging from _______ to _______ percent are attainable?

1. 25, 35
2. 40, 50
3. 60, 70
4. 75, 85

MCQ: The applications of selenium rectifiers are usually limited to potential of_____________?

1. 10 V
2. 30 V
3. 60 V
4. 100 V
5. 200 V

MCQ: Selenium rectifier can be operated at temperatures as high as____________?

1. 25°C
2. 40°C
3. 60°C
4. 75°C