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MCQs

Total Questions : 2100 | Page 1 of 210 pages
Question 1. A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)
  1.     m₁ r₂ = m₂ r₁
  2.     m₁ r₁ = m₂ r₂
  3.     m₁ m₂ = r₁ r₂
  4.     None of these
 Discuss Question
Answer: Option B. ->  m₁ r₁ = m₂ r₂
Question 2. Oldham’s coupling is an inversion of the kinematic chain used in
  1.     Whitworth quick return mechanism
  2.     Elliptical trammels
  3.     Rotary engine
  4.     Universal joint
 Discuss Question
Answer: Option B. ->  Elliptical trammels
Question 3. A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)
  1.     m₁ r₂ = m₂ r₁
  2.     m₁ r₁ = m₂ r₂
  3.     m₁ m₂ = r₁ r₂
  4.     None of these
 Discuss Question
Answer: Option B. ->  m₁ r₁ = m₂ r₂
Question 4. A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)
  1.     m₁ r₂ = m₂ r₁
  2.     m₁ r₁ = m₂ r₂
  3.     m₁ m₂ = r₁ r₂
  4.     None of these
 Discuss Question
Answer: Option B. ->  m₁ r₁ = m₂ r₂
Question 5. If two moving elements have surface contact in motion, such pair is known as
  1.     Sliding pair
  2.     Rolling pair
  3.     Surface pair
  4.     Higher pair
 Discuss Question
Answer: Option D. ->  Higher pair
Question 6. Higher pairs are those which have
  1.     Point or line contact between the two elements when in motion
  2.     Surface contact between the two elements when in motion
  3.     Elements of pairs not held together mechanically
  4.     Two elements that permit relative motion
 Discuss Question
Answer: Option A. ->  Point or line contact between the two elements when in motion
Question 7. The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. this may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to
  1.     One lower pair and two additional links
  2.     Two lower pairs and one additional link
  3.     Two lower pairs and two additional links
  4.     Any one of these
 Discuss Question
Answer: Option B. ->  Two lower pairs and one additional link
Question 8. The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m).(dx/dt) + (s/m).x = 0, if the roots of the equation are __________ then the system will be under damped.
  1.     (1/2) μ W R
  2.     (2/3) μ W R
  3.     (3/4) μ W R
  4.     μ W R
 Discuss Question
Answer: Option B. ->  (2/3) μ W R
Question 9. If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the
  1.     0.5
  2.     1
  3.     1.5
  4.     2
 Discuss Question
Answer: Option B. ->  1
Question 10. If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the
  1.     0.5
  2.     1
  3.     1.5
  4.     2
 Discuss Question
Answer: Option B. ->  1

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