421. The coriolis component of acceleration exists whenever apoint moves along a path that has
linear displacement
rotational motion
gravitational acceleration
tangential acceleratio
✅ The correct answer is option B.
Theory of machines MCQs
422. The brake commonly used in railway trains is
shoe brake
band brake
band and block brake
internal expanding bra
✅ The correct answer is option A.
423. The sensitiveness of the governor __________ as the speed range decreases.
remains unaffected
decreases
increases
✅ The correct answer is option C.
424. The uniform pressure theory gives a higher frictional torque than the uniform wear theory.
Agree
Disagree
✅ The correct answer is option A.
426. There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is
Jan-24
1-Aug
Apr-15
12
✅ The correct answer is option A.
427. Which of the following statements regarding laws governing the friction between dry surfaces are correct?
The friction force is dependent on the materials of the contact surfaces.
The friction force is directly proportional to the normal force.
The friction force is independent of me area of contact.
all of the above
✅ The correct answer is option D.
428. The mechanism forms a structure, when the number of degrees of freedom (n) is equal to
0
1
2
-1
✅ The correct answer is option A.
429. The direction of linear velocity of any point on a link with respect to another point on the same link is
parallel to the link joining the points
perpendicular to the link joining the points
at 45° to the link joining the points
none of the above
✅ The correct answer is option B.
430. When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
to move the ship towards star-board
to move the ship towards port side
to raise the bow and lower the stern
to raise the stern and
✅ The correct answer is option A.