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MCQs

Total Questions : 543 | Page 9 of 55 pages
Question 81. The factor which affects the critical speed of a shaft is
  1.    Diameter of disc
  2.    Span of shaft
  3.    Eccentricity
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 82. Klein's construction is useful to determine
  1.    Velocity of various parts
  2.    Acceleration of various parts
  3.    Displacement of various parts
  4.    Angular acceleration of various parts
 Discuss Question
Answer: Option B. -> Acceleration of various parts
Question 83. A rigid body possesses ________ degrees of freedom
  1.    One
  2.    Two
  3.    Four
  4.    Six
 Discuss Question
Answer: Option D. -> Six
Question 84. A Hartnell governor is a
  1.    Dead weight governor
  2.    Pendulum type governor
  3.    Spring loaded governor
  4.    Inertia governor
 Discuss Question
Answer: Option C. -> Spring loaded governor
Question 85. In higher pair, the relative motion is
  1.    Purely turning
  2.    Purely sliding
  3.    Purely rotary
  4.    Combination of sliding and turning
 Discuss Question
Answer: Option D. -> Combination of sliding and turning
Question 86. In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to
  1.    0.2
  2.    0.4
  3.    0.6
  4.    0.8
 Discuss Question
Answer: Option C. -> 0.6
Question 87. The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line
  1.    Joining the corresponding points
  2.    Perpendicular to line as per (A)
  3.    Not possible to determine with these data
  4.    At 45° to line as per (A)
 Discuss Question
Answer: Option A. -> Joining the corresponding points
Question 88. The two parallel and coplanar shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is known as
  1.    Spur gearing
  2.    Helical gearing
  3.    Bevel gearing
  4.    Spiral gearing
 Discuss Question
Answer: Option A. -> Spur gearing
Question 89. In under damped vibrating system, if $${{x_1}}$$ and $${{x_2}}$$ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to
  1.    $$\frac{{{x_1}}}{{{x_2}}}$$
  2.    $$\log \frac{{{x_1}}}{{{x_2}}}$$
  3.    $$\log e\frac{{{x_1}}}{{{x_2}}}$$
  4.    $$\log \left( {{x_1} \times {x_2}} \right)$$
 Discuss Question
Answer: Option B. -> $$\log \frac{{{x_1}}}{{{x_2}}}$$
Question 90. The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as
  1.    Turning pair
  2.    Rolling pair
  3.    Sliding pair
  4.    Spherical pair
 Discuss Question
Answer: Option A. -> Turning pair

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