Electronic Instruments(Electrical Measurement And Instrumentation ) Questions and Answers

Question 1. DVM has ________
  1.    1-3 digits
  2.    2-5 digits
  3.    3-6 digits
  4.    7-10 digits
Explanation:-
Answer: Option C. -> 3-6 digits
Answer: (c).3-6 digits
Question 2. Successive approximation type DVM is based on the principle of ______
  1.    acceleration of an object
  2.    weight of an object
  3.    velocity of an object
  4.    momentum of an object
Explanation:-
Answer: Option B. -> weight of an object
Answer: (b).weight of an object
Question 3. What is a digitizing circuit?
  1.    converts digital signal to analog
  2.    boosts the magnitude of a digital signal
  3.    attenuates a digital signal
  4.    converts analog signal to digital
Explanation:-
Answer: Option D. -> converts analog signal to digital
Answer: (d).converts analog signal to digital
Question 4. User must wait for a stable reading.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 5. A successive approximation type DVM makes use _______
  1.    of a digital divider
  2.    of an analog divider
  3.    of an oscillator
  4.    of a transducer
Explanation:-
Answer: Option A. -> of a digital divider
Answer: (a).of a digital divider
Question 6. In a potentiometric DVM ________
  1.    voltage is compared
  2.    current is compared
  3.    resistance is compared
  4.    power is compared
Explanation:-
Answer: Option A. -> voltage is compared
Answer: (a).voltage is compared
Question 7. How to obtain balance?
  1.    by using a detector
  2.    by changing the pot setting
  3.    by supplying voltage
  4.    by using a transformer
Explanation:-
Answer: Option B. -> by changing the pot setting
Answer: (b).by changing the pot setting
Question 8. Unknown voltage is __________
  1.    converted to current
  2.    boosted
  3.    filtered
  4.    measured using a voltmeter
Explanation:-
Answer: Option C. -> filtered
Answer: (c).filtered
Question 9. In a potentiometric DVM, balance is obtained manually.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option B. -> False
Answer: (b).False
Question 10. How is the reference voltage obtained?
  1.    from a fixed current source
  2.    from a variable voltage source
  3.    from a variable current source
  4.    from a fixed voltage source
Explanation:-
Answer: Option D. -> from a fixed voltage source
Answer: (d).from a fixed voltage source
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