Maintenance & Testing Of Electrical Equipment Test Question(Electrical Engineering Questions ) Questions and Answers

Question 1. Which among these systems is an auxiliary plant in a power system?
  1.    Fuel oil system
  2.    Raw water system
  3.    Transformer oil plant
  4.    All of these
  5.    None of these
Explanation:-
Answer: Option D. -> All of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Which among these require a low voltage DC source?
  1.    Telemetering and communication
  2.    Uninterrupted power supply
  3.    The protective relays and the trip circuit
  4.    All of these
  5.    None of these
Explanation:-
Answer: Option D. -> All of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. Which circuit among the following requires a supply of 48 V DC source?
  1.    Trip coils and closing coils
  2.    Micro wave protection and communication
  3.    Dc measuring instruments
  4.    All of these
  5.    None of these
Explanation:-
Answer: Option B. -> Micro wave protection and communication
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. A primary cell is chemically _____________________.
  1.    Irreversible
  2.    Reversible
  3.    Reversible only once
  4.    Reversible upto five times
Explanation:-
Answer: Option A. -> Irreversible
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. How is an electrochemical cell rated if ‘n’ cells are connected in series?
  1.    Ah (ampere hour)
  2.    n Ah
  3.    Ah / n
  4.    nV / Ah
Explanation:-
Answer: Option B. -> n Ah
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. Which element is used as an anode in a dry cell?
  1.    Carbon
  2.    Zinc
  3.    Lead
  4.    Zinc sulphate
Explanation:-
Answer: Option A. -> Carbon
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Which among the following safety devices are provided on the power transformers?
  1.    Marshalling kiosk
  2.    Vacuum gauge
  3.    Pressure relief gauge
  4.    All of these
  5.    None of these
Explanation:-
Answer: Option D. -> All of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. What is the use of current transformers?
  1.    Stepping up AC current
  2.    Measuring and protection
  3.    Stepping down AC current
  4.    Both (b) and (c)
  5.    All of these
Explanation:-
Answer: Option D. -> Both (b) and (c)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. Which cooling system is employed for large transformers?
  1.    Oil natural oil forced
  2.    Oil natural air forced
  3.    Oil forced air forced
  4.    Both (b) and (c)
  5.    All of these
Explanation:-
Answer: Option D. -> Both (b) and (c)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Which gel ensures the dryness of the incoming air in the breather?
  1.    Potassium gel
  2.    Silica gel
  3.    Carbon gel
  4.    All of these
Explanation:-
Answer: Option B. -> Silica gel
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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