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MCQs

Total Questions : 2607 | Page 76 of 261 pages
Question 751. An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called
  1.    addendum circle
  2.    dedendum circle
  3.    pitch circle
  4.    clearance circle
 Discuss Question
Answer: Option C. -> pitch circle
Answer: (c).pitch circle
Question 752. If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as
  1.    T sec³ φ
  2.    T sec² φ
  3.    T/sec³ φ
  4.    T cosec φ
 Discuss Question
Answer: Option A. -> T sec³ φ
Answer: (a).T sec³ φ
Question 753. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the
  1.    head
  2.    shank
  3.    thread
  4.    middle
 Discuss Question
Answer: Option C. -> thread
Answer: (c).thread
Question 754. The velocity of sliding __________ the distance of the point of contact from the pitch point.
  1.    is directly proportional to
  2.    is inversely proportional to
  3.    is equal to cos φ multiplied by
  4.    does not depend upon
 Discuss Question
Answer: Option A. -> is directly proportional to
Answer: (a).is directly proportional to
Question 755. In unilateral system of tolerance, the tolerance is allowed on
  1.    one side of the actual size
  2.    one side of the nominal size
  3.    both sides of the actual size
  4.    both sides of the nominal size
 Discuss Question
Answer: Option B. -> one side of the nominal size
Answer: (b).one side of the nominal size
Question 756. In order to obtain the bolts of uniform strength, an axial hole is drilled through the head as far as the threaded portion such that the area of shank becomes equal to the root area of the thread.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 757. An open belt drive is used when
  1.    shafts are arranged parallel and rotate in the opposite directions
  2.    shafts are arranged parallel and rotate in the same directions
  3.    shafts are arranged at right angles and rotate in one definite direction
  4.    driven shaft is to be started or stopped whenever desired without interferring with the driving shaft
 Discuss Question
Answer: Option B. -> shafts are arranged parallel and rotate in the same directions
Answer: (b).shafts are arranged parallel and rotate in the same directions
Question 758. The working of metals above the recrystallisation temperature is known as hot working.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 759. In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
  1.    remains constant at all speeds
  2.    is minimum at zero speed and increases monotonically with increase in speed
  3.    is maximum at zero speed and decreases monotonically with increase in speed
  4.    becomes minimum at an optimum speed and then increases with further increase in speed
 Discuss Question
Answer: Option D. -> becomes minimum at an optimum speed and then increases with further increase in speed
Answer: (d).becomes minimum at an optimum speed and then increases with further increase in speed
Question 760. The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
  1.    increases
  2.    decreases
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> increases
Answer: (a).increases

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