MCQs

Total Questions : 2607 | Page 41 of 261 pages
Question 401. The bearings of medium series have capacity __________ over the light series.
  1.    10 to 20%
  2.    20 to 30%
  3.    30 to 40%
  4.    40 to 50%
 Discuss Question
Answer: Option C. -> 30 to 40%
Question 402. If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will
  1.    Have same value as that of standard specimen
  2.    Increase
  3.    Decrease
  4.    None of these
 Discuss Question
Answer: Option C. -> Decrease
Question 403. The effective stress in wire ropes during normal working is equal to the stress due to
  1.    Axial load plus stress due to bending
  2.    Acceleration/retardation of masses plus stress due to bending
  3.    Axial load plus stress due to acceleration/retardation
  4.    Bending plus stress due to acceleration/retardation
 Discuss Question
Answer: Option A. -> Axial load plus stress due to bending
Question 404. When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as
  1.    Crown bevel gears
  2.    Angular bevel gears
  3.    Mitre gears
  4.    Internal bevel gears
 Discuss Question
Answer: Option A. -> Crown bevel gears
Question 405. When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as
  1.    Angular bevel gears
  2.    Crown bevel gears
  3.    Internal bevel gears
  4.    Miter gears
 Discuss Question
Answer: Option D. -> Miter gears
Question 406. The maximum efficiency of a square threaded screw is
  1.    (1 - sinφ)/ (1 + sinφ)
  2.    (1 + sinφ)/ (1 - sinφ)
  3.    (1 - sinφ)/ (1 + cosφ)
  4.    (1 + cosφ)/ (1 - sinφ)
 Discuss Question
Answer: Option A. -> (1 - sinφ)/ (1 + sinφ)
Question 407. The crest diameter of a screw thread is same as
  1.    Major diameter
  2.    Minor diameter
  3.    Pitch diameter
  4.    Core diameter
 Discuss Question
Answer: Option A. -> Major diameter
Question 408. In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.
  1.    Equal to
  2.    Twice
  3.    Three times
  4.    Four times
 Discuss Question
Answer: Option D. -> Four times
Question 409. The connecting rod bolts are tightened up so that tightening stress
  1.    Is just sufficient to hold parts together
  2.    Approaches yield point
  3.    Is 50% of yield point
  4.    Is about yield point divided by safety factor
 Discuss Question
Answer: Option B. -> Approaches yield point
Question 410. The shear plane in case of bolts should
  1.    Be across threaded portion of shank
  2.    Be parallel to axis of bolt
  3.    Be normal to threaded portion of shank
  4.    Never be across the threaded portion
 Discuss Question
Answer: Option D. -> Never be across the threaded portion

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