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Free download in PDF Theory of Machines Multiple Choice Questions(MCQs) & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
The size of Gear is specified by
[A]
Module
[B]
Diametral pitch
[C]
Circular pitch
[D]
All of the above
(2)
The contact ratio of gears is always
[A]
more than one
[B]
less than one
[C]
one
[D]
zero
(3)
Which of the following motion of cam roller follower leads to the lowest jerk ?
[A]
Uniform
[B]
Simple harmonic
[C]
Cycloidal
[D]
Parabolic
(4)
The cam follower used in automobile engines is
[A]
spherical faced
[B]
knife edged
[C]
roller
[D]
flat faced
(5)
The cam size depends upon
[A]
base circle
[B]
prime circle
[C]
pitch circle
[D]
operating speed of the cam
(6)
The Davis steering gear fulfills the condition of correct gearing at
[A]
two positions
[B]
three positions
[C]
all positions
[D]
one positions
(7)
Which of these mechanisms gives an approximately straight line ?
[A]
Hart
[B]
Watt
[C]
Paucellier
[D]
Kempe
(8)
Ackermann steering gear consists of
[A]
sliding pairs
[B]
turning pairs
[C]
rolling pairs
[D]
higher pairs
(9)
Automobile steering gear is an example of
[A]
lower pair
[B]
rotary pair
[C]
sliding pair
[D]
higher pair
(10)
A universal joint an example of
[A]
sliding pair
[B]
lower pair
[C]
higher pair
[D]
rolling pair
(11)
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
Answer: the point on cam pitch curve having the maximum pressure angle
(12)
The space centrode of a circular disc rolling on a straight path is
[A]
a circle
[B]
a straight line
[C]
ellipse
[D]
a parabola
(13)
The example of lower pair is
[A]
automobile steering gear
[B]
straight line motion mechanisms
[C]
shaft revolving in a bearing
[D]
all of the above
(14)
Quick return mechanism is used in
[A]
Slotter
[B]
Milling machine
[C]
Universal lathe machine
[D]
Hook’s coupling
(15)
The instantaneous centers which vary with the configuration of mechanism are called
[A]
Neither fixed nor permanent instantaneous centers
[B]
Fixed instantaneous centers
[C]
Permanent instantaneous centers
[D]
None of the above
Answer: Neither fixed nor permanent instantaneous centers
(16)
Degree of freedom of super structure is
[A]
less than zero
[B]
greater than one
[C]
zero
[D]
less than one
(17)
The example of successfully constrained motion is a
[A]
Piston reciprocating inside an engine cylinder
[B]
Motion of the shaft between a footstep bearing
[C]
Motion of an I.C. engine valve
[D]
All of the above
(18)
The lead screw of a lather with nut is a
[A]
screw pair
[B]
sliding pair
[C]
rolling pair
[D]
turning pair
(19)
The unbalanced primary forces in a reciprocating engine are
[A]
Balanced partially
[B]
Balanced completely
[C]
Balanced by secondary forces
[D]
Not balanced
Answer: Balanced partially
(20)
The contact ratio gears is always
[A]
more than one
[B]
zero
[C]
one
[D]
less than one
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