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Engineering :: Theory of Machines


41.  A cam profile is the
A. Profile of path traced by a cam follower B. Actual working contour of the cam
C. The profile of the path to be traced by the mechanism driven by follower D. Total surface area of the cam
E. Path which the cam follower traces    

42.  The throw of a cam is the maximum distance of the follower from
A. Starting to finish B. Base circle
C. Pitch circle D. Root circle
E. Inner most circle    

43.  Klien's construction gives a graphical construction for
A. Velocity polygon B. Acceleration polygon
C. Four bar chain mechanism D. Slider crank mechanism
E. Angular accelerations    

44.  In case of Scotch Yoke Mechanism the Coriolis component is
A. Involved B. Not involved
C. Sometimes involved D. Involved if some other conditions are satisfied
E. Involved but generally neglected    

45.  Coriolis component of acceleration will exist only if
A. There are two coincidental points B. Two coincident points have relative angular velocity of sliding
C. Two coincidental points have linear relative velocity of sliding accompanied by the rotation about fixed centres D. The two coincidental points must have same centre of rotation
E. None of the above    

46.  Coriolis component is encountered in
A. Slider crank mechanism B. Four bar chain mechanism
C. Quich return mechanism D. (A) and (B) above
E. (A) and (C) above    

47.  The direction of Corioli's component of acceleration is
A. The direction of relative velocity vector for the two coincidental points rotated by 90? in the direction of the angular velocity of the rotation of the link B. The direction of relative velocity vector for the two coincidental points rotated by 180? in the direction of the angular velocity of the rotation of the link
C. The direction of relative velocity vector for the two coincidental points in the direction directly opposite to that of angular velocity D. The direction at right angles to that of relative angular velocity vector
E. None of the above    

48.  Coriolis component is not involved in
A. Quick return mechanism B. Tangent cam acceleration
C. Andreau variable stroke engine mechanism D. Line sliding in a swivelling pin
E. Slider crank mechanism    

49.  Coriorli's component of acceleration exists whenever a point moves along a path that has
A. Linear displacement B. Rotational motion
C. Gravitational acceleration D. Tangential acceleration
E. Centripetal acceleration    

50.  Tangential acceleration direction is
A. Along the angular velocity B. Perpendicular to the angular velocity
C. Opposite to the angular velocity D. Any of (A) and (B)
E. Any of (A) and (C)    




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