August
V62/T07051/EE/20150810
2015
Theory of Machines and Mechanisms
Instructions:
Marks-80
Time: 3 Hrs
1. All questions are compulsory.
2. “Long Answer type Question (LAQ)” is a supply type
question of 15 marks which required a typical answer of about
60-80 lines in bout 32-40 minutes.
3. “Sort Answer type Question (SAQ)” is a supply type question
of 5 marks which required a typical answer of about 15-20 lines
in bout 08-10 minutes.
4. Figures to the right indicate marks allotted to the questions.
5. Assume suitable data if necessary
6. Use a nonprogrammable type of scientific calculator is
allowed
Marks
SECTION-A
Q.1 A Cam with 30 MM Minimum diameter is rotating clockwise at a
uniform speed and has to give the follower motion to roller follower
15 mm diameter. Follower to complete floweret outward stroke of
25 mm during 120° of cam rotation with S.H.M. (simple harmonic
motion) Follower to dwell for 60 °Of Cam rotation . Follower to
return to its initial position during 120° of cam rotation with
uniform acceleration and retardation , follower to dwell for
remaining cam rotation .Draw the cam profile if the axis of the
roller follower asses through the axis of the cam.
OR
Q.1 A Cam operates a roller. In line reciprocating follower Minimum
radius of cam = 25 cm, Diameter of roller = 15 mm, Angle of lift =
120 ° (NATURE OF LIFT S.H.M.) Outer Dwell angle 30° , angle
of return 150°( Nature of return uniform acceleration and
retardation where acceleration is equal to retardation
Q.2 Klein's construction for acceleration diagram angular acceleration
diagram angular acceleration of the crank
15
15
15
OR
Q.2 Explain the working of simple watt Governor with neat sketch
15
Q.3 Difference Between Machine and structure.
5
Q.4 Draw the sketch of cam and follower system
5
SECTION-B
Q.5 An open belt 20 cm wide 0.8 m thick transmits power to a pulley at
a speed 1000 m/min. If the density of leather belt is 0.001 Kg/ cm2
an permissible pull in it is 200 N /cm 2 . Calculate the power that
can be transmitted at this speed . The Tensions on tight side is twice
of the tension of the slack side.
15
OR
Q.5 Write Gear Terminology, and draw sketch.
15
Q.6 Which type of brake is used in parking brake? Differentiate
between absorption and transmission type of dynamo meters
15
OR
Q.6 How by Graphical method , balancing force and angular position of
balancing mass can be found for several masses rotating in one
plane
15
Q.7 Difference Between Flywheel and Governor.
5
Q.8 Define cross Belt and open belt
5
Computer Generated Random Question Paper dated: 06-07-2015 16:08:28
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