Testing and Commissioning of Electrical Equipments (2180901) MCQs

MCQs of Testing of Transformer, Plant and Equipment

Showing 51 to 60 out of 66 Questions
3 4 5 6 7
51.
Which of the following parameters is/are checked Quarterly in a transformer?
(a) Dehydrating breather
(b) Bushings
(c) Earth resistance
(d) All of these
Answer:

Option (b)

52.
Which of the following parameters is/are checked Half-yearly in a transformer?
(a) Oil level in transformer
(b) Non-conservator transformer
(c) Non-conservator
(d) All of these
Answer:

Option (b)

53.
Which of the following parameters is/are checked Yearly in a transformer?
(a) Earth resistance
(b) Relays, alarms, their circuits etc.
(c) Oil BDV in the transformer
(d) All of these
Answer:

Option (d)

54.
When do we need to Filter the oil regardless of its condition?
(a) Monthly
(b) Half-yearly
(c) Yearly
(d) After 2 year
Answer:

Option (d)

55.
The __________ determines the direction of the secondary current in relation to the primary current.
(a) Voltage Ratio
(b) polarity
(c) Phaser Group
(d) All of these
Answer:

Option (b)

56.
The polarity of a current transformer is determined by,
(a) the direction in which the coils are wound around the core of the CT (clockwise or counterclockwise)
(b) by which way the secondary leads are brought out of the transformer case.
(c) Both of these
(d) None of these
Answer:

Option (c)

57.
CT polarity is sometimes indicated with an arrow. These CTs should be installed with the arrow pointing in the direction of ________________
(a) current flow (source to load)
(b) current flow (load to source)
(c) Power flow (source to load)
(d) Power flow (load to source)
Answer:

Option (a)

58.
On subtractive polarity transformers, the H1 primary lead and the X1 secondary lead are on the ________________ of the transformer
(a) opposit side
(b) same side
(c) Any side
(d) All of these
Answer:

Option (b)

59.
Wrong connection of the current transformers can cause
(a) wrong power measurement
(b) false operation of the protection relays
(c) Both of these
(d) None of these
Answer:

Option (c)

60.
Which of the following equipment is/are required for polarity check of CT?
(a) 9 volt Battery
(b) Switch
(c) Center type analogue meter
(d) All of these
Answer:

Option (d)

Showing 51 to 60 out of 66 Questions
3 4 5 6 7