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MCQs

Total Questions : 103 | Page 10 of 11 pages
Question 91. An average-reading digital Multimeter reads 10 V when fed with a triangular wave, symmetric about the time-axis. If the input is same, the rms reading meter will read?
  1.    20/\(\sqrt{3}\)
  2.    -10/\(\sqrt{3}\)
  3.    -20/\(\sqrt{3}\)
  4.    10/\(\sqrt{3}\)
 Discuss Question
Answer: Option D. -> 10/\(\sqrt{3}\)
Answer: (d).10/\(\sqrt{3}\)
Question 92. The figure shows a three-phase, delta connected load supplied from a 220 V, 50 Hz, 3-phase balanced source. The pressure Coil (PC) and Current Coil (CC) of a watt-meter are connected to the load as shown, with the coil polarities suitably selected to ensure a positive deflection. The watt-meter reading will be?The Figure Shows A Three-phase, Delta Connected Load Supplie...
  1.    Zero
  2.    1600 W
  3.    242 W
  4.    400 W
 Discuss Question
Answer: Option C. -> 242 W
Answer: (c).242 W
Question 93. Two watt-meters connected to measure the total power on a three-phase system supplying a balanced load reads 10.5 kW and -2.5 kW respectively. Then the total power factor is?
  1.    0.334
  2.    0.684
  3.    0.52
  4.    0.334
 Discuss Question
Answer: Option D. -> 0.334
Answer: (d).0.334
Question 94. Wattmeters are compensated for errors due to inductance by _________
  1.    using a series capacitor
  2.    using a parallel capacitor
  3.    using a series resistance
  4.    using a parallel resistance
 Discuss Question
Answer: Option B. -> using a parallel capacitor
Answer: (b).using a parallel capacitor
Question 95. Current in a pressure coil of the Dynamometer type wattmeter ________
  1.    lags the applied voltage
  2.    leads the applied voltage
  3.    is in phase with the applied voltage
  4.    there is a phase difference of 90 degrees
 Discuss Question
Answer: Option A. -> lags the applied voltage
Answer: (a).lags the applied voltage
Question 96. Eddy currents are induced in solid metal parts within the thickness of the conductor.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 97. What is the effect of frequency on the torque of a moving system?
  1.    torque is half of the frequency
  2.    torque is twice the frequency
  3.    torque is thrice the frequency
  4.    torque is four times the frequency
 Discuss Question
Answer: Option B. -> torque is twice the frequency
Answer: (b).torque is twice the frequency
Question 98. In an ordinary dynamometer, the deflecting torque is _________
  1.    small
  2.    medium
  3.    large
  4.    very large
 Discuss Question
Answer: Option A. -> small
Answer: (a).small
Question 99. Shunt magnet consists of _________
  1.    N shaped laminations
  2.    E shaped laminations
  3.    S shaped laminations
  4.    M shaped laminations
 Discuss Question
Answer: Option D. -> M shaped laminations
Answer: (d).M shaped laminations
Question 100. Shunt magnet has _________
  1.    large turns of wire
  2.    small turns of wire
  3.    medium turns of wire
  4.    no turns or wires
 Discuss Question
Answer: Option A. -> large turns of wire
Answer: (a).large turns of wire

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