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Free download in PDF Cam and Follower Objective Type Questions and 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.
(21)
The pressure angle of a cam depends upon
[A]
angle of ascent
[B]
lift of follower
[C]
offset between centre lines of cam and follower
[D]
all of the mentioned
Answer: all of the mentioned
(22)
Angle of ascent of cam is defined as the angle
[A]
through which the cam rotates during the period in which the follower remains in highest position
[B]
moved by the cam from the instant the follower begins to rise, till it reaches its highest position
[C]
during which the follower returns to its initial position
[D]
of rotation of the cam for a definite displacement of the follower
Answer: moved by the cam from the instant the follower begins to rise, till it reaches its highest position
(23)
Cam size depends upon
[A]
outer circle
[B]
pitch circle
[C]
base circle
[D]
prime circle
(24)
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by
[A]
ω2×OQtanθ
[B]
ω2×OQ
[C]
ω2×OQsinθ
[D]
ω2×OQcosθ
(25)
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by
[A]
(R-r1)(1-cosθ)
[B]
R(1-sinθ)
[C]
R(1-cosθ)
[D]
(R-r1)(1-sinθ)
(26)
The linear velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by
[A]
ωr1+r2)sinθsec2θ
[B]
ω(r1+r2)cosθcosec2θ
[C]
ω(r1-r2)sinθ
[D]
ω(r1-r2)cosθ
(27)
Which of the following displacement diagrams should be chosen for better dynamic performance of a cam-follower mechanism ?
[A]
cycloidal motion
[B]
parabolic motion
[C]
simple hormonic motion
[D]
none of the mentioned
(28)
For high speed engines, the cam follower should move with
[A]
cycloidal motion
[B]
uniform velocity
[C]
uniform acceleration and retardation
[D]
simple harmonic motion
(29)
For low and moderate speed engines, the cam follower should move with
[A]
simple harmonic motion
[B]
cycloidal motion
[C]
uniform velocity
[D]
uniform acceleration and retardation
Answer: simple harmonic motion
(30)
Ofset is provided to a cam follower mechanism to
[A]
avoid jerk
[B]
accelerate
[C]
minimise the side thrust
[D]
None of the above
Answer: minimise the side thrust
31
A radial follower is one
[A]
that reciprocates in the guides
[B]
that oscillates
[C]
in which the follower translates along an axis passing through the cam centre of rotation.
[D]
none of the mentioned
Answer: that reciprocates in the guides
32
The cam follower generally used in automobile engines is
[A]
spherical faced follower
[B]
roller follower
[C]
knife edge follower
[D]
flat faced follower
Answer: spherical faced follower
33
A circle drawn with centre as the cam centre and radius equal to the distance between the cam centre and the point on the pitch curve at which the pressure angle is maximum, is called
[A]
base circle
[B]
pitch circle
[C]
prime circle
[D]
none of the mentioned