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MCQs

Total Questions : 543 | Page 51 of 55 pages
Question 501. For the brake to be self locking, the force P at C shown in the below figure, should
  1.    Be zero
  2.    Act in upward direction
  3.    Act in downward direction
  4.    None of these
 Discuss Question
Answer: Option A. -> Be zero
Question 502. The tendency of a body to resist change from rest or motion is known as
  1.    Mass
  2.    Friction
  3.    Inertia
  4.    Resisting force
 Discuss Question
Answer: Option C. -> Inertia
Question 503. When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.
  1.    Upward
  2.    Downward
  3.    Forward
  4.    Backward
 Discuss Question
Answer: Option B. -> Downward
Question 504. A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.
  1.    Equal to
  2.    Less than
  3.    Greater than
  4.    None of these
 Discuss Question
Answer: Option C. -> Greater than
Question 505. The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft and $$\alpha $$ = Semi-angle of the cone)
  1.    $$\frac{1}{2}\mu {\text{WRcosec}}\alpha $$
  2.    $$\frac{2}{3}\mu {\text{WRcosec}}\alpha $$
  3.    $$\frac{3}{4}\mu {\text{WRcosec}}\alpha $$
  4.    $$\mu {\text{WRcosec}}\alpha $$
 Discuss Question
Answer: Option B. -> $$\frac{2}{3}\mu {\text{WRcosec}}\alpha $$
Question 506. A point on a link connecting double slider crank chain traces a
  1.    Ellipse
  2.    Circle
  3.    Parabola
  4.    Hyperbola
 Discuss Question
Answer: Option A. -> Ellipse
Question 507. The arrangement is called bevel gearing, when two __________ are connected by gears.
  1.    Intersecting and coplanar shafts
  2.    Non-intersecting and non-coplanar shafts
  3.    Parallel and coplanar shafts
  4.    Parallel and non-coplanar shafts
 Discuss Question
Answer: Option A. -> Intersecting and coplanar shafts
Question 508. The Whitworth quick return motion mechanism is formed in a slider crank chain when the
  1.    Coupler link is fixed
  2.    Longest link is a fixed link
  3.    Slider is a fixed link
  4.    Smallest link is a fixed link
 Discuss Question
Answer: Option A. -> Coupler link is fixed
Question 509. The inversion of a mechanism is
  1.    Changing of a higher pair to a lower pair
  2.    Turning its upside down
  3.    Obtained by fixing different links in a kinematic chain
  4.    Obtained by reversing the input and output motion
 Discuss Question
Answer: Option C. -> Obtained by fixing different links in a kinematic chain
Question 510. The factional torque for square thread at the mean radius r while raising load W is given by
  1.    $${\text{T}} = {\text{Wr}}\tan \left( {\varphi - \alpha } \right)$$
  2.    $${\text{T}} = {\text{Wr}}\tan \left( {\varphi + \alpha } \right)$$
  3.    $${\text{T}} = {\text{Wr}}\tan \alpha $$
  4.    $${\text{T}} = {\text{Wr}}\tan \varphi $$
 Discuss Question
Answer: Option B. -> $${\text{T}} = {\text{Wr}}\tan \left( {\varphi + \alpha } \right)$$

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