CS/B.TECH/APM(NEW)/TT(NEW)/SEM-4/TT-401/2012
2012
THEORY OF MACHINES
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following : 10 × 1 = 10
i) According to the Kennedy's theorem, if three bodies
have plane motion, their instantaneous centres lie on
a) a point b) a straight line
c) three lines d) a triangle.
ii) Quick return mechanism is an inversion of
a) double slider crank chain
b) crossed slider crank chain
c) four bar chain
d) single slider crank chain.
iii) In a spring mass system, if the mass is halved and the
spring stiffness is double, the natural frequency is
a) halved b) doubled
c) unchanged d) quadrupled.
iv) Antifriction bearings are
a) ball and roller bearings
b) thin lubricated bearings
c) sleeve bearings
d) hydrodynamic bearings.
v) When the frictional force helps the applied force in
applying the brake, the brake is
a) self-locking b) automatic
c) self-energising d) all of these.