Electrical Measurement And Instrumentation

EXTENSION OF INSTRUMENT RANGES MCQs

Total Questions : 117

Page 1 of 12 pages
Question 1. Coils of a C.T. are separately wound.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer is Option A. -> True
Answer: (a).True
Question 2. The windings of a C.T. are ________
  1.    tied together
  2.    shorted
  3.    wound over one another
  4.    grounded
 Discuss Question
Answer is 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.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer is Option A. -> True
Answer: (a).True
Question 4. Turns compensation is used to obtain ________
  1.    to compensate the turns
  2.    to equalise the turns on the windings
  3.    to protect the equipment
  4.    transformation ratio equal to nominal ratio
 Discuss Question
Answer is 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%?
  1.    transformation ratio reduces by the same value
  2.    no effect
  3.    nominal ratio increase by the same value
  4.    secondary current increases by the same value
 Discuss Question
Answer is 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. ____________
  1.    can be shorted
  2.    can’t be shorted
  3.    can be opened
  4.    can’t be opened
 Discuss Question
Answer is Option A. -> can be shorted
Answer: (a).can be shorted
Question 7. The secondary winding of a C.T. is opened when?
  1.    C.T. is magnetised
  2.    C.T. is demagnetised
  3.    C.T. is shorted
  4.    C.T. is opened
 Discuss Question
Answer is Option B. -> C.T. is demagnetised
Answer: (b).C.T. is demagnetised
Question 8. Potential transformers are used to measure _________
  1.    high voltages
  2.    low voltages
  3.    high currents
  4.    low currents
 Discuss Question
Answer is Option A. -> high voltages
Answer: (a).high voltages
Question 9. Potential transformers are used with _________
  1.    high range voltmeter
  2.    low range voltmeter
  3.    intermediate range voltmeter
  4.    very high range voltmeter
 Discuss Question
Answer is Option B. -> low range voltmeter
Answer: (b).low range voltmeter
Question 10. The rectangular type of C.T. is built of _________
  1.    L shaped windings
  2.    T shaped windings
  3.    A shaped windings
  4.    Z shaped windings
 Discuss Question
Answer is Option A. -> L shaped windings
Answer: (a).L shaped windings