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Mechanical Engineering Objective Questions { Theory of Machines }



120. For the same lift and same angle of ascent, a smaller base circle will give
A.A small value of pressure angle
B.A large value of pressure angle
C.There is no such relation with pressure angle
D.Something else

121. Care angle is defined as the angle
A.During which the follower returns to its initial position
B.Of rotation of the cam for a definite displacement of the follower
C.Through which the cam rotates during the period in, which the fdllower remains in the highest position
D.Moved by the cam' from the instant the follower begins to rise, till it reaches its higbet poition

122. Angle of ascent of cam is defined as the angle
A.During which the follower returns to its initial position
B.Of rotation of the cam for a, definite displacement of the follower
C.Through which the cam rotates during the period in which the follower remains in highest position
D.Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

123. The angle at any point on the pitch curve of the cam included between the normal to that point on the curve and line of motion of the follower at that instant is known as
A.Cam angle
B.Profile angle
C.Pressure angle
D.Dwell angle

124. For S.H.M. cam, the acceleration of the follower at the ends of the stroke and at mid-stroke respectively, is
A.Maximum and zero
B.Zero and maximum
C.Minimum and maximum
D.Zero and minimum

125. Throw of a cam is the maximum distance of the follower from?
A.Base circle
B.Pitch circle
C.Root circle
D.Prime circle

126. For simple harmonic motion of the cam follower, a cosine curve represents
A.Displacement diagram
B.Velocity diagram
C.Acceleration diagram
D.All of the above

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