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GATE ME 2021 || Theory of machines Quiz 5

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Question 1

Why is an offset provided in a radial cam-translating follower mechanism?

Question 2

A cam with uniform acceleration and retardation with 20 mm/s2 . During 120 of rotation of the cam, the follower raised by 20 mm, find the accelerating period of the follower in seconds. Consider no jerk during the motion of the follower.

Question 3

A cam with an ascent angle of 120 and maximum displacement of follower of 20 mm is rotating with an angular velocity of 88 rad/s and has a descent and then followed by dwell. If cam follower program has a constant acceleration then find the value of maximum velocity during ascent of the follower (in m/s) ________.

Question 4

The cam moves with a 300rpm, and has a least radius of 5cm. If the cam lifts the follower through 3.75cm when the cam attends 90 degree rotation in SHM. Determine the max. velocity of the follower during descent.

Question 5

In a cam design, the rise motion is given by a simple harmonic motion (SHM) where h is total rise, θ is camshaft angle, β is the total angle of the rise interval. The jerk is given by

Question 6

Match list I (terms) with list II (definition) and select the correct answer using the codes given below the lists:
List I
A) Base circle
B) Trace point
C) Pitch point
D) Prime circle
List II
I. Smallest circle that can be draw from the centre of cam and tangent to pitch curve
II. Smallest circle that can be draw from the centre of cam through the pitch points
III. Point on pitch curve having the maximum pressure angle
IV. Point on pitch curve having the minimum pressure angle
V. Smallest circle that can be draw to the cam profile
VI. Reference point on follower and used to generate pitch curve
Codes:
A B C D
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