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MCQs

Total Questions : 2607 | Page 5 of 261 pages
Question 41. The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
  1.    Heavier
  2.    Lighter
  3.    Moderate
  4.    None of these
 Discuss Question
Answer: Option B. -> Lighter
Question 42. The piston rod of a steam engine is usually connected to the cross-head by means of
  1.    Bolted joint
  2.    Knuckle joint
  3.    Cotter joint
  4.    Universal joint
 Discuss Question
Answer: Option C. -> Cotter joint
Question 43. If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio
  1.    Increases
  2.    Decreases
  3.    Remains unchanged
  4.    None of these
 Discuss Question
Answer: Option C. -> Remains unchanged
Question 44. The maximum shear stress theory is used for
  1.    Brittle materials
  2.    Ductile materials
  3.    Plastic materials
  4.    Nonferrous materials
 Discuss Question
Answer: Option B. -> Ductile materials
Question 45. The maximum normal stress theory is used for
  1.    Plastic materials
  2.    Brittle materials
  3.    Non-ferrous materials
  4.    Ductile materials
 Discuss Question
Answer: Option B. -> Brittle materials
Question 46. Rankine's theory is used for
  1.    Brittle materials
  2.    Ductile materials
  3.    Elastic materials
  4.    Plastic materials
 Discuss Question
Answer: Option A. -> Brittle materials
Question 47. Guest's theory is used for
  1.    Brittle materials
  2.    Ductile materials
  3.    Elastic materials
  4.    Plastic materials
 Discuss Question
Answer: Option B. -> Ductile materials
Question 48. In a turnbuckle, if one of the rods has left hand threads, then the other rod will have
  1.    Right hand threads
  2.    Left hand threads
  3.    Multiple threads
  4.    Pointed threads
 Discuss Question
Answer: Option A. -> Right hand threads
Question 49. The gears are termed as medium velocity gears, if their peripheral velocity is
  1.    1-3 m/s
  2.    3-15 m/s
  3.    15-30 m/s
  4.    30-50 m/s
 Discuss Question
Answer: Option B. -> 3-15 m/s
Question 50. For hardening alloy steels and high speed steels, they are heated to
  1.    1100 to 1300°C
  2.    1300 to 1500°C
  3.    500 to 600°C
  4.    700 to 900°C
 Discuss Question
Answer: Option A. -> 1100 to 1300°C

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