Testing and Commissioning of Electrical Equipments (2180901) MCQs

MCQs of Testing of Transformer, Plant and Equipment

Showing 41 to 50 out of 66 Questions
2 3 4 5 6 7
41.
What should be the reason for Un-equal heating in the bank of transformer?
(a) Improper tap changer position
(b) Phase fault in either primary or secondary
(c) The paralleled transformer may not share the load in proportion to their KVA rating
(d) All of these
Answer:

Option (b)

42.
What should be the reason for Noise in the transformer?
(a) Fore fittings/nut bolts are loose
(b) Tapping not set well
(c) shorted turns
(d) All of these
Answer:

Option (a)

43.
What should be the reason for Low insulation resistance b/w windings or b/w core & winding in a transformer?
(a) more acidity in oil
(b) Fore fittings/nut bolts are loose
(c) This may be due to moisture, line surge or lightning discharges
(d) All of these
Answer:

Option (c)

44.
What should be the reason for Low dielectric strength of Oil in a transformer?
(a) Moisture may be present
(b) more acidity in the oil
(c) shorted turns
(d) All of these
Answer:

Option (a)

45.
What should be the reason for corroded Transformer tank?
(a) more acidity in the oil
(b) Moisture may be present in oil
(c) shorted turns
(d) All of these
Answer:

Option (a)

46.
Which of the followings is/are Prior steps of commissioning of the transformer?
(a) Fill up accessories & oil up to level
(b) Connecting line cable & Earthing to be checked for proper connector
(c) Check Cooling system, Protection relays & tap position
(d) All of these
Answer:

Option (d)

47.
Which of the followings is/are Prior steps of commissioning of the transformer?
(a) Check Insulation & Earth resistance
(b) Clean bushings
(c) Check Breather’s conditions/silica gel be dry and blue in colour
(d) All of these
Answer:

Option (d)

48.
Which of the following parameters is/are checked hourly in a transformer?
(a) Voltage & Current
(b) Power
(c) Temprature
(d) All of these
Answer:

Option (d)

49.
Which of the following parameters is/are checked Daily in a transformer?
(a) Dehydrating breather
(b) Parameters like Voltage, Current, Power & Temp
(c) Bushings
(d) All of these
Answer:

Option (a)

50.
Which of the following parameters is/are checked Monthly in a transformer?
(a) Parameters like Voltage, Current, Power & Temp.
(b) Oil level in transformer
(c) Non-conservator transformer
(d) All of these
Answer:

Option (b)

Showing 41 to 50 out of 66 Questions
2 3 4 5 6 7