211. Bifilar suspension method is used to find the
angular acceleration of the body
moment of inertia of the body
periodic time of the body
frequency of vibration
✅ The correct answer is option B.
Theory of machines MCQs
212. When a point at the end of a link moves with constant angular velocity, its acceleration will have
radial component only
tangential component only
coriolis component only
radial and tangential
✅ The correct answer is option A.
213. An exact straight line motion mechanism is a
Scott-Russell’s mechanism
Hart’s mechanism
Peaucellier’s mechanism
all of these
✅ The correct answer is option D.
214. When one of the links of a kinematic chain is fixed, the chain is known as a
structure
mechanism
inversion
machine
✅ The correct answer is option B.
215. A slender shaft supported on two bearings at its ends carries a disc with an eccentricity e from the axis of rotation. The critical speed of the shaft is Nc. If the disc is replaced by a second one of same mass but mounted with an eccentricily 2 e, then the critical speed of the shaft in the second case is
Nc/2
Nc/2
Nc
2 Nc
✅ The correct answer is option A.
216. In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to
reduce vibration
reduce slip
ensure uniform loading
ensure proper alignmen
✅ The correct answer is option C.
217. In an open pair, the two elements of a pair
have a surface contact when in motion
have a line or point contact when in motion
are kept in contact by the action of external forces, when in motion
are not held together
✅ The correct answer is option D.
218. The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r1 and r2 = External and internal radii of collar respectively)
μ W (r1 + r2)
μ W (r1 + r2)
✅ The correct answer is option A.
219. The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in
a single plane
two planes
three planes
four planes
✅ The correct answer is option B.
220. The train value of a gear train is
equal to velocity ratio of a gear train
reciprocal of velocity ratio of a gear train
always greater than unity
always less than unity
✅ The correct answer is option B.