Transformers Mcqs
Transformers Mcqs, this topic has 134 mcqs, It takes five to ten minutes to complete this free Transformers Mcqs test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Transformers Mcqs" MCQs and share with your friends, brothers, sisters.
Transformers Mcqs (Total Quiz: 134)
MCQ: Which of the following statements regarding an idel single-phase transformer having a turn ratio of 1 : 2 and drawing a current of 10 A from 200 V A.C. supply is incorrect?
- Its secondary current is 5 A
- Its secondary voltage is 400 V
- Its rating is 2 kVA
- Its secondary current is 20 A
- It is a step-up transformer
D
MCQ: In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?
- hysteresis and eddy current losses
- friction and windage losses
- copper losses
- none of the above
A
MCQ: Losses which occur in rotating electric machines and do not occur in transformers are___________?
- friction and windage losses
- magnetic losses
- hysteresis and eddy current losses
- copper losses
A
MCQ: For given applied voltage, with the increase in frequency of the applied voltage?
- eddy current loss will decrease
- eddy current loss will increase
- eddy current loss will remain unchanged
- none of the above
C
MCQ: In a power or distribution transformer about 10 per cent end turns are heavily insulated__________?
- to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
- to absorb the line surge voltage and save the winding of transformer from damage
- to reflect the line surge and save the winding of a transformer from damage
- none of the above
A
MCQ: Reduction in core losses and increase in permeability are obtained with transformer employing__________?
- core built-up of laminations of cold rolled grain oriented steel
- core built-up of laminations of hot rolled sheet
- either of the above
- none of the above
A
MCQ: The noise produced by a transformer is termed as_______________________?
- zoom
- hum
- ringing
- buzz
B
MCQ: Which of the following parts of a transformer is visible from outside ?
- Bushings
- Core
- Primary winding
- Secondary winding
A
MCQ: Which of the following insulating materials can withstand the highest temperature safely ?
- Cellulose
- Asbestos
- Mica
- Glass fibre
C
MCQ: The efficiency of two identical transformers under load conditions can be determined by_______________?
- short-circuit test
- back-to-back test
- open circuit test
- any of the above
B