191. In a shaper mechanism, the coriolis component of acceleration does not exist.
TRUE
FALSE
✅ The correct answer is option B.
Theory of machines MCQs
192. When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
stable
unstable
isochronous
hunt
✅ The correct answer is option D.
193. The addendum is the radial distance of tooth from the pitch circle to the top of the tooth.
Agree
Disagree
✅ The correct answer is option A.
194. In Meyer’s expansion valve, the main valve is driven by an eccentric having an angle of advance from
10° – 15°
15° – 25°
25° – 30°
30° – 40°
✅ The correct answer is option C.
195. When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)
✅ The correct answer is option D.
196. The total number of instantaneous centres for a mechanism consisting of n links are
n/2
n
n – 1
n(n – 1)/2
✅ The correct answer is option D.
197. A single degree of freedom system is given by , with usual notations. It represents
free vibration with damping
free vibration without damping
forced vibration with damping
forced vibration witho
✅ The correct answer is option C.
198. Which of the following governor is used to drive a gramophone?
Watt governor
Porter governor
Pickering governor
Hartnell governor
✅ The correct answer is option C.
199. The distance moved by the valve from one end to the other end is called valve travel.
TRUE
FALSE
✅ The correct answer is option A.
200. The cam follower generally used in air-craft engines is
knife edge follower
flat faced follower
spherical faced follower
roller follower
✅ The correct answer is option D.