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MCQs

Total Questions : 53 | Page 2 of 6 pages
Question 11. What is the crown type of glasses?
  1.    Laboratory apparatus grade
  2.    Optical grade
  3.    Sealing type
  4.    Ultraviolet transmitting type
 Discuss Question
Answer: Option B. -> Optical grade
Answer: (b).Optical grade
Question 12. What is 96% silica glass used for?
  1.    Heat shield
  2.    Combustion tubes
  3.    Electronic tubes
  4.    Temperature thermometers
 Discuss Question
Answer: Option A. -> Heat shield
Answer: (a).Heat shield
Question 13. What is the maximum service temperature of aluminosilicate glass?
  1.    220°C
  2.    460°C
  3.    650°C
  4.    1200°C
 Discuss Question
Answer: Option C. -> 650°C
Answer: (c).650°C
Question 14. What are lead glasses used for?
  1.    Kitchenware
  2.    Optical components
  3.    Electronic tubes
  4.    Temperature thermometers
 Discuss Question
Answer: Option B. -> Optical components
Answer: (b).Optical components
Question 15. Which type of glass is regarded as the most heat resistant?
  1.    Fused silica
  2.    Aluminosilicate
  3.    96% silica
  4.    Borosilicate
 Discuss Question
Answer: Option A. -> Fused silica
Answer: (a).Fused silica
Question 16. Glasses show evidence of _____ fractures.
  1.    No
  2.    Brittle
  3.    Ductile
  4.    Oblique
 Discuss Question
Answer: Option B. -> Brittle
Answer: (b).Brittle
Question 17. The loss of heat in elastomers due to friction is known as ________
  1.    Resilience
  2.    Hardness
  3.    Resistivity
  4.    Hysteresis
 Discuss Question
Answer: Option D. -> Hysteresis
Answer: (d).Hysteresis
Question 18. How does the crystallinity of an elastomer affect its strength?
  1.    Increases with increase in crystallinity
  2.    Increases with decrease in crystallinity
  3.    Decreases with increase in crystallinity
  4.    No effect
 Discuss Question
Answer: Option A. -> Increases with increase in crystallinity
Answer: (a).Increases with increase in crystallinity
Question 19. Plastics and elastomers differ due to their properties of ________
  1.    Resistivity
  2.    Dielectric strength
  3.    Acoustic insulation
  4.    Extensibility
 Discuss Question
Answer: Option D. -> Extensibility
Answer: (d).Extensibility
Question 20. Which of the following is not a characteristic of rubber?
  1.    Non-crystalline
  2.    Electrical conductivity
  3.    Chemical resistance
  4.    Low softening temperature
 Discuss Question
Answer: Option B. -> Electrical conductivity
Answer: (b).Electrical conductivity

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