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.Management Sciences
Category: Theory of Machines
Cylindrical cams can be classified as_________________?
A. circular
B. tangent
C. reciprocating
D. all of the above
E. none of the above
Pitch point on a cam is_________________?
A. any point on pitch curve
B. the point on cam pitch curve having the maximum pressure angle
C. any point on pitch circle
D. the point on cam pitch curve having the minimum pressure angle
E. none of the above
“Open pairs are those which have__________________?
A. point or line contact between the two elements when in motion
B. surface contact between the two ele-ments when in motion
C. elements of pairs not held together mechanically
D. two elements that permit relative motion
E. none of the above
The maximum value of the pressure angle in case of cam is kept as________________?
A. 10°
B. 14°
C. 20°
D. 30°
E. 25°.
Cam size depends upon__________________?
A. base circle
B. pitch circle
C. prime circle
D. outer circle
E. none of the above
The number of links and instantaneous centers in a reciprocating engine mechanism are ___________________?
A. 4, 4
B. 4, 5
C. 5, 4
D. 6, 4
E. 4, 6
The Scott-Russell mechanism consists of_________________?
A. sliding and turning pairs
B. sliding and rotary pairs
C. turning and rotary pairs
D. sliding pairs only
E. turning pairs only
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimidstroke respectively, is__________________?
A. maximum and zero
B. zero and maximum
C. minimum and maximum
D. zero and minimum
E. maximum and minimum
In S.H.M., the velocity vector w.r.t. displacement vector _________________?
A. leads by 90°
B. lags by 90°
C. leads by 180°
D. are in phase
E. could be anywhere.
The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as__________________?
A. turning pair
B. rolling pair
C. sliding pair
D. spherical pair
E. lower pair
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