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MCQs

Total Questions : 199 | Page 10 of 20 pages
Question 91. Calculate the frequency if the number of revolutions is 300 and the paired poles are 50.
  1.    15kHz
  2.    150kHz
  3.    1500kHz
  4.    150Hz
 Discuss Question
Answer: Option A. -> 15kHz
Answer: (a).15kHz
Question 92. Calculate the number of paired poles if the frequency id 15kHz and the number of revolutions is 300.
  1.    10
  2.    30
  3.    50
  4.    70
 Discuss Question
Answer: Option C. -> 50
Answer: (c).50
Question 93. What is the frequency of a two pole machine having n=50?
  1.    100Hz
  2.    200Hz
  3.    50Hz
  4.    25Hz
 Discuss Question
Answer: Option C. -> 50Hz
Answer: (c).50Hz
Question 94. What is the minimum number of poles that a machine must have __________
  1.    1
  2.    2
  3.    4
  4.    10
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 95. What is the type of current obtained by finding the square of the currents and then finding their average and then fining the square root?
  1.    RMS current
  2.    Average current
  3.    Instantaneous current
  4.    Total current
 Discuss Question
Answer: Option A. -> RMS current
Answer: (a).RMS current
Question 96. What is the current found by finding the current in an equidistant region and dividing by n?
  1.    RMS current
  2.    Average current
  3.    Instantaneous current
  4.    Total current
 Discuss Question
Answer: Option B. -> Average current
Answer: (b).Average current
Question 97. Find the average value of current when the current that are equidistant are 4A, 5A and 6A.
  1.    5A
  2.    6A
  3.    15A
  4.    10A
 Discuss Question
Answer: Option A. -> 5A
Answer: (a).5A
Question 98. RMS stands for ________
  1.    Root Mean Square
  2.    Root Mean Sum
  3.    Root Maximum sum
  4.    Root Minimum Sum
 Discuss Question
Answer: Option A. -> Root Mean Square
Answer: (a).Root Mean Square
Question 99. Average value of current over a full cycle is?
  1.    0.67Im
  2.    0
  3.    6.7Im
  4.    3.3Im
 Discuss Question
Answer: Option B. -> 0
Answer: (b).0
Question 100. For a direct current, the rms voltage is ________ the mean voltage.
  1.    Greater than
  2.    Less than
  3.    Equal to
  4.    Not related to
 Discuss Question
Answer: Option C. -> Equal to
Answer: (c).Equal to

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