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MCQs

Total Questions : 103 | Page 4 of 11 pages
Question 31. Small torque for energy meter is provided __________
  1.    by a supply
  2.    by a shading loop
  3.    by unshaded loop
  4.    by a transformer
 Discuss Question
Answer: Option B. -> by a shading loop
Answer: (b).by a shading loop
Question 32. Frictional errors are dominant in an energy meter.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 33. Friction torque is eliminated by _________
  1.    using lubricating oil
  2.    by suspending the components in air
  3.    by adjusting the position of limb
  4.    by using steel alloy components
 Discuss Question
Answer: Option C. -> by adjusting the position of limb
Answer: (c).by adjusting the position of limb
Question 34. At full load, disc __________
  1.    partially revolves and then stops
  2.    continuously revolves
  3.    does not revolve at all
  4.    revolves in an alternating fashion
 Discuss Question
Answer: Option B. -> continuously revolves
Answer: (b).continuously revolves
Question 35. Driving torque is small and is adjustable.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 36. Self braking torque is _________
  1.    proportional to cube of load current
  2.    proportional to load current
  3.    proportional to square of load current
  4.    proportional to reciprocal of load current
 Discuss Question
Answer: Option C. -> proportional to square of load current
Answer: (c).proportional to square of load current
Question 37. Overload compensating devices is _________
  1.    in the form of a magnetic shunt
  2.    in the form of a series magnet
  3.    in the form of a transformer
  4.    in the form of a supply
 Discuss Question
Answer: Option A. -> in the form of a magnetic shunt
Answer: (a).in the form of a magnetic shunt
Question 38. Magnitude of flux in an energy meter varies __________
  1.    due to abnormal currents and voltages
  2.    due to high resistance and inductance values
  3.    due to changes in the transformer turns
  4.    due to the induced e.m.f in the windings
 Discuss Question
Answer: Option A. -> due to abnormal currents and voltages
Answer: (a).due to abnormal currents and voltages
Question 39. Phase angles in an energy meter cannot be incorrect.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 40. Self braking action is minimised by _________
  1.    maintaining high speed for disc
  2.    maintaining medium speed for disc
  3.    keeping the disc at rest
  4.    maintaining low speed for disc
 Discuss Question
Answer: Option D. -> maintaining low speed for disc
Answer: (d).maintaining low speed for disc

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