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MCQs

Total Questions : 2607 | Page 8 of 261 pages
Question 71. In designing a connecting rod, it is considered like __________ for buckling about X-axis.
  1.    Both ends hinged
  2.    Both ends fixed
  3.    One end fixed and the other end hinged
  4.    One end fixed and the other end free
 Discuss Question
Answer: Option A. -> Both ends hinged
Question 72. Tensile strength of a mild steel specimen can be roughly predicted from following hardness test
  1.    Brinell
  2.    Rockwell
  3.    Vickers
  4.    None of the above
 Discuss Question
Answer: Option A. -> Brinell
Question 73. Which of the following statement is correct regarding power screws?
  1.    The efficiency of a self locking screw can not be more than 50%
  2.    The efficiency of Acme (trapezoidal) thread is less than that of a square thread
  3.    If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
  4.    Both (A) and (B)
 Discuss Question
Answer: Option D. -> Both (A) and (B)
Question 74. A connecting rod should be
  1.    Strong in buckling about X-axis
  2.    Strong in buckling about Y-axis
  3.    Equally strong in buckling about X-axis and Y-axis
  4.    Any one of the above
 Discuss Question
Answer: Option C. -> Equally strong in buckling about X-axis and Y-axis
Question 75. When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads
  1.    Compression
  2.    Tension
  3.    Shear
  4.    Combined loads
 Discuss Question
Answer: Option B. -> Tension
Question 76. A screw is said to be over hauling screw, if the
  1.    Friction angle is less than helix angle
  2.    Friction angle is more than helix angle
  3.    Friction angle is equal to helix angle
  4.    Efficiency of screw is 100%
 Discuss Question
Answer: Option A. -> Friction angle is less than helix angle
Question 77. In order to permit the thermal expansion/contraction of tubing, it should be
  1.    Crimped
  2.    Honed
  3.    Flared
  4.    Bent
 Discuss Question
Answer: Option D. -> Bent
Question 78. The rolling contact bearings are known as
  1.    Thick lubricated bearings
  2.    Plastic bearings
  3.    Antifriction bearings
  4.    Thin lubricated bearings
 Discuss Question
Answer: Option C. -> Antifriction bearings
Question 79. Deep groove ball bearings are used for
  1.    Heavy thrust load only
  2.    Small angular displacement of shafts
  3.    Radial load at high speed
  4.    Combined thrust and radial loads at high speed
 Discuss Question
Answer: Option D. -> Combined thrust and radial loads at high speed
Question 80. A backing ring is used inside the pipe joint when making a
  1.    Butt weld
  2.    Fillet weld
  3.    Sleeve weld
  4.    Socket weld
 Discuss Question
Answer: Option A. -> Butt weld

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