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MCQs

Total Questions : 43 | Page 3 of 5 pages
Question 21. What kind of indenter is used in a Brinell test?
  1.    Diamond cone
  2.    Steel ball
  3.    Pen dot
  4.    Long tube
 Discuss Question
Answer: Option B. -> Steel ball
Answer: (b).Steel ball
Question 22. How does the Vicker’s hardness test differ from Brinell’s?
  1.    Duration of indentation
  2.    Type of indenter
  3.    Materials to be tested
  4.    Load applied
 Discuss Question
Answer: Option B. -> Type of indenter
Answer: (b).Type of indenter
Question 23. For how long is the load maintained in a Brinell test?
  1.    2-4 seconds
  2.    10-15 seconds
  3.    20-30 seconds
  4.    45-55 seconds
 Discuss Question
Answer: Option B. -> 10-15 seconds
Answer: (b).10-15 seconds
Question 24. What is the angle of indenter in Vicker’s hardness test?
  1.    96 degrees
  2.    110 degrees
  3.    136 degrees
  4.    150 degrees
 Discuss Question
Answer: Option C. -> 136 degrees
Answer: (c).136 degrees
Question 25. How is the Vicker’s hardness number defined as?
  1.    1.8544PD²
  2.    1.8544P 1/D²
  3.    8.544P 1/D²
  4.    8.544PD²
 Discuss Question
Answer: Option B. -> 1.8544P 1/D²
Answer: (b).1.8544P 1/D²
Question 26. Which of the following is not a Rockwell hardness scale?
  1.    A
  2.    E
  3.    N
  4.    K
 Discuss Question
Answer: Option C. -> N
Answer: (c).N
Question 27. Which materials are to be tested using an F-scale?
  1.    Copper and brass
  2.    Case hardened steels
  3.    Bronze, gunmetal, and beryllium copper
  4.    Thermoplastics
 Discuss Question
Answer: Option A. -> Copper and brass
Answer: (a).Copper and brass
Question 28. The indenter used in C-scale of Rockwell hardness test is named _________
  1.    CABAL
  2.    BRALE
  3.    BRALL
  4.    IDOL
 Discuss Question
Answer: Option B. -> BRALE
Answer: (b).BRALE
Question 29. Which of the following scales are used for testing of very soft thermoplastics?
  1.    A
  2.    E
  3.    H
  4.    R
 Discuss Question
Answer: Option D. -> R
Answer: (d).R
Question 30. What is the load that the Vickers hardness test can carry?
  1.    10 kg
  2.    120 kg
  3.    150 kg
  4.    3000 kg
 Discuss Question
Answer: Option B. -> 120 kg
Answer: (b).120 kg

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