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MCQs

Total Questions : 152 | Page 13 of 16 pages
Question 121. What is the main disadvantage of a true r.m.s responding voltmeter?
  1.    presence of transducer
  2.    presence of thermocouple
  3.    presence of transformer
  4.    presence of oscillator
 Discuss Question
Answer: Option B. -> presence of thermocouple
Answer: (b).presence of thermocouple
Question 122. Power in a thermocouple is given by ________
  1.    Power = E² rms / Rheater
  2.    Power = E² rms
  3.    Power = Rheater
  4.    Power = E² rms × Rheater
 Discuss Question
Answer: Option A. -> Power = E² rms / Rheater
Answer: (a).Power = E² rms / Rheater
Question 123. Accuracy of a DVM is ________
  1.    low
  2.    high
  3.    medium
  4.    zero
 Discuss Question
Answer: Option B. -> high
Answer: (b).high
Question 124. Normal mode noise can be eliminated through ________
  1.    attenuation
  2.    filtering
  3.    amplification
  4.    a transformer
 Discuss Question
Answer: Option B. -> filtering
Answer: (b).filtering
Question 125. In DVM the common mode rejection noise is eliminated by ________
  1.    increasing the signal amplitude
  2.    making use of a resistance
  3.    using a transformer
  4.    guarding
 Discuss Question
Answer: Option D. -> guarding
Answer: (d).guarding
Question 126. Output of DVM needs ________
  1.    4 lines
  2.    2 lines
  3.    8 lines
  4.    16 lines
 Discuss Question
Answer: Option A. -> 4 lines
Answer: (a).4 lines
Question 127. Input impedance of a DVM is ________
  1.    low
  2.    zero
  3.    high
  4.    medium
 Discuss Question
Answer: Option C. -> high
Answer: (c).high
Question 128. What is the effect of the input signal on the output teeth?
  1.    directly proportional
  2.    inversely proportional
  3.    independent
  4.    square proportional
 Discuss Question
Answer: Option A. -> directly proportional
Answer: (a).directly proportional
Question 129. Application of an input voltage generates a ____________
  1.    linear signal at the output
  2.    ramp at the output
  3.    exponential signal at the output
  4.    unit step signal at the output
 Discuss Question
Answer: Option B. -> ramp at the output
Answer: (b).ramp at the output
Question 130. Accuracy depends on ____________
  1.    input voltage
  2.    drop across the capacitor
  3.    magnitude and stability of pulse generator
  4.    magnitude of the ramp
 Discuss Question
Answer: Option C. -> magnitude and stability of pulse generator
Answer: (c).magnitude and stability of pulse generator

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