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Extension Of Instrument Ranges(Electrical Measurement And Instrumentation ) Questions and Answers
Home
Topic
Electrical Measurement And Instrumentation
Extension Of Instrument Ranges
Question 1.
Coils of a C.T. are separately wound.
True
False
May be True or False
Can't say
Explanation:-
Answer: Option A. ->
True
Answer:
(a).
True
Question 2.
The windings of a C.T. are ________
tied together
shorted
wound over one another
grounded
Explanation:-
Answer: Option C. ->
wound over one another
Answer:
(c).
wound over one another
Question 3.
At high voltages, the current transformers are enclosed in a tank.
True
False
May be True or False
Can't say
Explanation:-
Answer: Option A. ->
True
Answer:
(a).
True
Question 4.
Turns compensation is used to obtain ________
to compensate the turns
to equalise the turns on the windings
to protect the equipment
transformation ratio equal to nominal ratio
Explanation:-
Answer: Option D. ->
transformation ratio equal to nominal ratio
Answer:
(d).
transformation ratio equal to nominal ratio
Question 5.
What is the effect of reducing the secondary turns in a C.T. by 1%?
transformation ratio reduces by the same value
no effect
nominal ratio increase by the same value
secondary current increases by the same value
Explanation:-
Answer: Option A. ->
transformation ratio reduces by the same value
Answer:
(a).
transformation ratio reduces by the same value
Question 6.
The secondary winding of a C.T. ____________
can be shorted
can’t be shorted
can be opened
can’t be opened
Explanation:-
Answer: Option A. ->
can be shorted
Answer:
(a).
can be shorted
Question 7.
The secondary winding of a C.T. is opened when?
C.T. is magnetised
C.T. is demagnetised
C.T. is shorted
C.T. is opened
Explanation:-
Answer: Option B. ->
C.T. is demagnetised
Answer:
(b).
C.T. is demagnetised
Question 8.
Potential transformers are used to measure _________
high voltages
low voltages
high currents
low currents
Explanation:-
Answer: Option A. ->
high voltages
Answer:
(a).
high voltages
Question 9.
Potential transformers are used with _________
high range voltmeter
low range voltmeter
intermediate range voltmeter
very high range voltmeter
Explanation:-
Answer: Option B. ->
low range voltmeter
Answer:
(b).
low range voltmeter
Question 10.
The rectangular type of C.T. is built of _________
L shaped windings
T shaped windings
A shaped windings
Z shaped windings
Explanation:-
Answer: Option A. ->
L shaped windings
Answer:
(a).
L shaped windings
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