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MCQs

Total Questions : 2607 | Page 71 of 261 pages
Question 701. When two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft, the arrangement is known as spiral gearing.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> No
Answer: (b).No
Question 702. A screw is specified by its
  1.    major diameter
  2.    minor diameter
  3.    pitch diameter
  4.    pitch
 Discuss Question
Answer: Option A. -> major diameter
Answer: (a).major diameter
Question 703. 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
Answer: (b).less than
Question 704. The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T1, and T2 = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)
  1.    T₁/T₂ = μθ
  2.    log (T₁/T₂) = μθ
  3.    T₁/T₂ =eμθ
  4.    T₁/T₂ = log μθ
 Discuss Question
Answer: Option C. -> T₁/T₂ =eμθ
Answer: (c).T₁/T₂ =eμθ
Question 705. The shock resistance of steel is increased by adding
  1.    nickel
  2.    chromium
  3.    nickel and chromium
  4.    cobalt and molybedenum
 Discuss Question
Answer: Option C. -> nickel and chromium
Answer: (c).nickel and chromium
Question 706. The property of a bearing material which has the ability to accomodate small particles of dust, grit etc. without scoring the material of the journal, is called
  1.    bondability
  2.    embeddability
  3.    comformability
  4.    fatigue strength
 Discuss Question
Answer: Option B. -> embeddability
Answer: (b).embeddability
Question 707. The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to
  1.    0.75/(0.75 + √v)
  2.    3/(3 + v)
  3.    4.5/(4.5 + v)
  4.    6/(6 + v)
 Discuss Question
Answer: Option B. -> 3/(3 + v)
Answer: (b).3/(3 + v)
Question 708. When a machine member is subjected to torsion, the torsional shear stress set up in the member is
  1.    zero at both the centroidal axis and outer surface of the member
  2.    maximum at both the centroidal axis and outer surface of the member
  3.    zero at the centroidal axis and maximum at the outer surface of the member
  4.    maximum at the centroidal axis and zero at the outer surface of the member
 Discuss Question
Answer: Option C. -> zero at the centroidal axis and maximum at the outer surface of the member
Answer: (c).zero at the centroidal axis and maximum at the outer surface of the member
Question 709. In cylindrical cams, the follower moves
  1.    in a direction perpendicular to the cam axis
  2.    in a direction parallel to the cam axis
  3.    in any direction irrespective of cam axis
  4.    along the cam axis
 Discuss Question
Answer: Option B. -> in a direction parallel to the cam axis
Answer: (b).in a direction parallel to the cam axis
Question 710. If the centre distance of the mating gears having involute teeth is increased, then the pressure angle
  1.    increases
  2.    decreases
  3.    remains unchanged
  4.    None of these
 Discuss Question
Answer: Option A. -> increases
Answer: (a).increases

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