MCQs

Total Questions : 2607 | Page 40 of 261 pages
Question 391. The dynamic tooth load is due to
  1.    Inaccuracies of tooth spacing
  2.    Irregularities in tooth profiles
  3.    Deflections of teeth under load
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 392. When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be
  1.    0.8 d
  2.    1.2 d
  3.    1.57 d
  4.    1.8 d
 Discuss Question
Answer: Option C. -> 1.57 d
Question 393. The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is
  1.    7.5 kN
  2.    10.6 kN
  3.    15 kN
  4.    22.5 kN
 Discuss Question
Answer: Option B. -> 10.6 kN
Question 394. In a partial journal bearing, the angle of contact of the bearing with the journal is
  1.    120°
  2.    180°
  3.    270°
  4.    360°
 Discuss Question
Answer: Option A. -> 120°
Question 395. In a full journal bearing, the angle of contact of the bearing with the journal is
  1.    120°
  2.    180°
  3.    270°
  4.    360°
 Discuss Question
Answer: Option D. -> 360°
Question 396. If a bearing is designated by the number 305, it means that the bearing is of
  1.    Medium series whose bore is 5 mm
  2.    Medium series whose bore is 25 mm
  3.    Light series whose bore is 25 mm
  4.    Light series whose bore is 5 mm
 Discuss Question
Answer: Option B. -> Medium series whose bore is 25 mm
Question 397. In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be
  1.    0.96
  2.    0.97
  3.    0.98
  4.    0.99
 Discuss Question
Answer: Option A. -> 0.96
Question 398. The static tooth load should be __________ the dynamic load.
  1.    Equal to
  2.    Less than
  3.    Greater than
  4.    None of these
 Discuss Question
Answer: Option C. -> Greater than
Question 399. The wear load should be __________ the dynamic load.
  1.    Equal to
  2.    Less than
  3.    Greater than
  4.    None of these
 Discuss Question
Answer: Option B. -> Less than
Question 400. In designing a key, it is assumed that the distribution of forces along the length of key
  1.    Varies linearly
  2.    Is uniform throughout
  3.    Varies exponentially, being more at the torque-input end
  4.    Varies exponentially, being less at the torque-input end
 Discuss Question
Answer: Option B. -> Is uniform throughout

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