Mechanical Engineering - Theory of machines

1.
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.
vertically and parallel
vertically and perpendicular
horizontally and parallel
horizontally and perpendicular
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
The contact ratio is given by
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
At the node, the shaft remains unaffected by the vibration.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω1 rad/s in the clockwise direction and the link OB turns with angular velocity ω2 rad/s in the anti-clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)
ω12.r
( ω1 - ω2)r
( ω1 + ω2)r
( ω1 - ω2)2r
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
When the two elements of a pair have __________ when in motion, it is said to a lower pair.
line or point contact
surface contact
Answer: Option
Explanation:
No answer description is available. Let's discuss.