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SSC JE 2019 -20 Cams
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Question 1
In terms of physical significance, The size of a cam depends upon,
Question 2
For high speed engines, the cam follower should move with ________.
Question 3
Why offset is provided in a cam follower mechanism?
Question 4
Which one of the following is the correct chronological sequence in the follower motion of Cams in the descending order of maximum velocity (in respect to angle of stroke, speed, lift)?
1. Cycloidal motion.
2. Simple Harmonic motion.
3. Uniform velocity motion.
1. Cycloidal motion.
2. Simple Harmonic motion.
3. Uniform velocity motion.
Question 5
For designing of a Cam, if
is the total rise, 
is camshaft angle, 
is total rise angle and the rise motion of the cam is given by a SHM - Simple Harmonic Motion 
, then the equation for the jerk will be given by
is the total rise, is camshaft angle, is total rise angle and the rise motion of the cam is given by a SHM - Simple Harmonic Motion , then the equation for the jerk will be given by
Question 6
What is the maximum acceleration of follower in a cam and follower mechanism undergoing simple harmonic motion if the cam rotational angle is 
and 
is rotation speed of cam ?
and is rotation speed of cam ?Question 7
The equation of velocity of follower which is starting from rest and have a constant acceleration is given by:
Question 8
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
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
Question 9
Match the following:-
Column - I
A) Knife edge follower
B) Roller follower
C) Flat face follower
D) Radial follower
Column - II
(i) Wear is absent
(ii) Wear is highly reduced
(iii) Excessive wear
(iv) Line of motion passing from center of rotation
Question 10
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.
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