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MCQs

Total Questions : 543 | Page 25 of 55 pages
Question 241. The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
  1.    Pitch circle
  2.    Base circle
  3.    Pitch curve
  4.    Prime circle
 Discuss Question
Answer: Option C. -> Pitch curve
Question 242. The sense of Coriolis component $$2\omega {\text{v}}$$  is same as that of the relative velocity vector $${\text{v}}$$ rotated at
  1.    45° in the direction of rotation of the link containing the path
  2.    45° in the direction opposite to the rotation of the link containing the path
  3.    90° in the direction of rotation of the link containing the path
  4.    180° in the direction opposite to the rotation of the link containing the path
 Discuss Question
Answer: Option C. -> 90° in the direction of rotation of the link containing the path
Question 243. In a ball bearing, ball and bearing forms a
  1.    Turning pair
  2.    Rolling pair
  3.    Screw pair
  4.    Spherical pair
 Discuss Question
Answer: Option B. -> Rolling pair
Question 244. In automobiles the power is transmitted from gear box to differential through
  1.    Bevel gear
  2.    Universal joint
  3.    Hooke's joint
  4.    Knuckle joint
 Discuss Question
Answer: Option C. -> Hooke's joint
Question 245. The balancing weights are introduced in planes parallel to the plane of rotation of the disturbing mass. To obtain complete dynamic balance, the minimum number of balancing weights to be introduced in different planes is
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Question 246. The frictional torque transmitted in a truncated conical pivot bearing, considering uniform pressure, is
  1.    $$\frac{1}{2}\mu {\text{Wcosec}}\alpha \left( {{{\text{r}}_{\text{1}}} + {{\text{r}}_{\text{2}}}} \right)$$
  2.    $$\frac{2}{3}\mu {\text{Wcosec}}\alpha \left( {{{\text{r}}_{\text{1}}} + {{\text{r}}_{\text{2}}}} \right)$$
  3.    $$\frac{1}{2}\mu {\text{Wcosec}}\alpha \left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$
  4.    $$\frac{2}{3}\mu {\text{Wcosec}}\alpha \left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$
 Discuss Question
Answer: Option D. -> $$\frac{2}{3}\mu {\text{Wcosec}}\alpha \left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$
Question 247. In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.
  1.    Equal to
  2.    Less than
  3.    Greater than
  4.    None of these
 Discuss Question
Answer: Option A. -> Equal to
Question 248. The Coriolis component of acceleration exists whenever a point moves along a path that has
  1.    Linear displacement
  2.    Rotational motion
  3.    Gravitational acceleration
  4.    Tangential acceleration
 Discuss Question
Answer: Option B. -> Rotational motion
Question 249. The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called
  1.    Dedendum
  2.    Addendum
  3.    Clearance
  4.    Working depth
 Discuss Question
Answer: Option C. -> Clearance
Question 250. Flexible coupling is used because
  1.    It is easy to disassemble
  2.    It is easy to engage and disengage
  3.    It transmits shocks gradually
  4.    It prevents shock transmission and eliminates stress reversals
 Discuss Question
Answer: Option D. -> It prevents shock transmission and eliminates stress reversals

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