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Theory of Machines - Mechanical Engineering Multiple Choice Questions and Answers for competitive exams

1.    Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and the motion of the parts
(a)    theory of machines
(b)    applied mechanics
(c)    mechanisms   
(d)     kinetics
(e)     kinematics.
Ans: d
2.    Which of the following disciplines provides study of relative motion between the parts of a machine
(a)    theory of machines
(b)    applied mechanics
(c)    mechanisms   
(d)     kinetics
(e)    kinematics.
Ans: e

3.    Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts
(a)    theory of machines
(b)    applied mechanics
(c)    mechanisms
(d)    kinetics
(e)    kinematics.
Ans: a

4.    The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as
(a)     turning pair   
(b)     rolling pair
(c)     sliding pair    
(d)     spherical pair
(e)     lower pair,
Ans: a

5.    Which of the following is a lower pair
(a)    ball and socket   
(b)    piston and cylinder
(c)    cam and follower
(d)    (a) and (b) above
(e)    belt drive.
Ans: d

6.    If two moving elements have surface contact in motion, such pair is known as
(a)     sliding pair    
(b)     rolling pair
(c)     surface pair   
(d)     lower pair
(e)     higher pair.
Ans: e

7.    The example of lower pair is
(a)    shaft revolving in a bearing
(b)    straight line motion mechanisms
(c)    automobile steering gear
(d)    all of the above
(e)    none of the above.
Ans: d

8.    Pulley in a belt drive acts as
(a)    cylindrical pair
(b)    turning pair
(c)    rolling pair
(d)    sliding pair
(e)    surface pair.
Ans: c

9.    The example of rolling pair is
(a)    bolt and nut
(b)    lead screw of a lathe
(c)    ball and socket joint
(d)    ball bearing and roller bearing
(e)    all of the above.
Ans: d

10.    Any point on a link connecting double slider crank chain will trace a
(a)     straight line    
(b)     circle
(c)     ellipse   
(d)     parabola
(e)     hyperbola.
Ans: c

11.    Theipurpose of a link is to
(a)    transmit motion
(b)    guide other links
(c)    act as a support
(d)    all of the above
(e)    none of the above.
Ans: d

12.    A universal joint is an example of
(a)     higher pair     
(b)     lower pair
(c)     rolling pair    
(d)     sliding pair
(e)     turning pair.
Ans: b

13.    Rectilinear motion of piston is converted into rotary by
(a)     cross head      
(b)     slider crank
(c)    connecting rod
(d)    gudgeon pin
(e)    four bar chain mechanism.
Ans: b

14.    Pitch point on a cam is
(a)    any point on pitch curve
(b)    the point on cam pitch curve having the maximum pressure angle
(c)    any point on pitch circle
(d)    the point on cam pitch curve having the minimum pressure angle
(e)    none of the above.
Ans: b

15.    The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be
(a)    0, and more than co2r
(b)    0, and less than coV
(c)    0, 0   
(d)     cor, 0
(e)     none of the above.
Ans: a

 Read More Questions:
Theory of Machines - Mechanical Engineering Part1
Theory of Machines - Mechanical Engineering Part2
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