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DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY,
LONERE – RAIGAD – 402 103
Summer Semester Examination – May – 2019


Semester: IV
Branch: B.Tech. (Mechanical)
Subject with Subject Code: Theory of MachinesI (BTMEC402) Marks: 60
Date: 16/05/2019 Time:3 Hrs.
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Instructions to the Students
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. Each question carries 12 marks.
. Attempt any five questions of the following.
. Illustrate your answers with neat sketches, diagram etc., wherever necessary.
. If some part or parameter is noticed to be missing, you may appropriately assume it and should mention it clearly.
. Non programmable calculator is allowed.
. Graphical numerical should solve on only drawing sheet.


(Marks)
Q.1.
A. Explain in detail with diagram. Types of constrained motions.
(05)
B. Locate all the instantaneous centres of the slider crank mechanism as shown in Fig.. The lengths of crank
OB and connecting rod AB are 100 mm and 400 mm respectively. If the crank rotates clockwise with an
angular velocity of 10 rad/s, find: 1. Velocity of the slider A, and 2. Angular velocity of the connecting rod
AB (Graphical Method).
(07)
Q.2.
A. The dimensions and configuration of the four bar mechanism, shown in Fig., are as follows : P1A = 300
mm; P2B = 360 mm; AB = 360mm, and P1P2 = 600 mm. The angle AP1P2 = 60°. The crank P1A has an
angular velocity of 10 rad/s and an angular acceleration of 30 rad/s2, both clockwise. Determine the angular
velocities and angular accelerations of P2B, and AB and the velocity and acceleration of the joint B.
(Graphical Method)
(
07)
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