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MCQs

Total Questions : 66 | Page 1 of 7 pages
Question 1. Pyrex glass is otherwise known as _________ glass.
  1.    soda lime
  2.    fused silica
  3.    borosilicate
  4.    pyroceram
 Discuss Question
Answer: Option C. -> borosilicate
Answer: (c).borosilicate
Question 2. Pyroceram glass softens above ______
  1.    1000°C
  2.    2000°C
  3.    4500°C
  4.    5500°C
 Discuss Question
Answer: Option B. -> 2000°C
Answer: (b).2000°C
Question 3. A copolymer of butadiene and acrylonitrile is known as __________
  1.    Nitrile rubber
  2.    Butyl rubber
  3.    Polysulphide rubber
  4.    Fluorine rubber
 Discuss Question
Answer: Option A. -> Nitrile rubber
Answer: (a).Nitrile rubber
Question 4. What is the percentage of elongation of styrene butadiene rubber?
  1.    60-70%
  2.    140-160%
  3.    250-300%
  4.    500-600%
 Discuss Question
Answer: Option D. -> 500-600%
Answer: (d).500-600%
Question 5. Cork is composed of _____ air.
  1.    <1%
  2.    <10%
  3.    20%
  4.    >50%
 Discuss Question
Answer: Option D. -> >50%
Answer: (d).>50%
Question 6. What is the temperature at which a change from the anti-ferromagnetic phase to paramagnetic phase occurs?
  1.    Weiss
  2.    Curie
  3.    Neel
  4.    Debye
 Discuss Question
Answer: Option B. -> Curie
Answer: (b).Curie
Question 7. The hysteresis loss in soft magnetic materials must be kept ______
  1.    High
  2.    Minimum
  3.    Zero
  4.    Unaltered
 Discuss Question
Answer: Option B. -> Minimum
Answer: (b).Minimum
Question 8. The supermaloy primarily composed of ________________
  1.    Nickel
  2.    Iron
  3.    Cobalt
  4.    Copper
 Discuss Question
Answer: Option A. -> Nickel
Answer: (a).Nickel
Question 9. Which of the following is an example of soft magnetic material?
  1.    Permalloy
  2.    Strontium
  3.    Alnico
  4.    Neodymium
 Discuss Question
Answer: Option A. -> Permalloy
Answer: (a).Permalloy
Question 10. What is the relative permeability of iron?
  1.    250
  2.    1500
  3.    2700
  4.    100,000
 Discuss Question
Answer: Option A. -> 250
Answer: (a).250

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