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MCQs

Total Questions : 166 | Page 11 of 17 pages
Question 101. What are insulating materials that can tolerate maximum temperature?
  1.     Porcelain.
  2.     Glass.
  3.     Mica.
  4.     All of these.
 Discuss Question
Answer: Option D. ->  All of these.
Question 102. What is the dielectric constant of mica ?
  1.      3 to 8.
  2.     100.
  3.     200.
  4.     1 to 2.
 Discuss Question
Answer: Option A. ->   3 to 8.
Question 103. Temporary magnets are used in which of the following ?
  1.      All of these.
  2.      Generators.
  3.      Hoist.
  4.      Motors.
 Discuss Question
Answer: Option A. ->   All of these.
Question 104. How many classes of insulating materials are there?
  1.     8.
  2.     6.
  3.     5.
  4.     7.
 Discuss Question
Answer: Option D. ->  7.
Question 105. Which of the following is the example for piezo-electric material ?
  1.    None of these
  2.     Copper
  3.     Lead zirconate titanate
  4.     Potassium niobate
 Discuss Question
Answer: Option C. ->  Lead zirconate titanate
Question 106. When will be the electron pair bonding occurs ?
  1.    None of these
  2.     Lack holes
  3.     Share holes
  4.     Share electrons
 Discuss Question
Answer: Option D. ->  Share electrons
Question 107. ALNICO is an alloy of
  1.     aluminium, nickel.
  2.     aluminium, nickel, iron and cobalt.
  3.     iron, aluminium.
  4.     iron, cobalt, nickel.
 Discuss Question
Answer: Option B. ->  aluminium, nickel, iron and cobalt.
Question 108. Why diamond is very hard ?
  1.     Because of high melting point
  2.     Because of covalent solid
  3.    None of these
  4.     Because of large cohesive energy
 Discuss Question
Answer: Option D. ->  Because of large cohesive energy
Question 109. What is the value of dielectric constant of air?
  1.     Less than 1
  2.     1.
  3.     0.
  4.     none of these.
 Discuss Question
Answer: Option B. ->  1.
Question 110. Cryogenics is a branch of science dealing with which of the following?
  1.     Friction and wear.
  2.     Crystal growth.
  3.      Low temperature.
  4.     High temperature.
 Discuss Question
Answer: Option C. ->   Low temperature.

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