A kinematic chain requires at least________________________?
(A) 2 links and 3 turning pairs
(B) 3 links and 4 turning pairs
(C) 4 links and 4 turning pairs
(D) 5 links and 4 turning pairs
(D) none of the above
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
(D) moved by the cam from beginning oi ascent to the termination of descent
The pressure angle of a cam depends upon___________________?
(A) offset between centre lines of cam and follower
(B) lift of follower
(C) angle of ascent
(D) sum of radii of base circle and roller follower
(D) all of the above
Klein’s construction can be used when_________________?
(A) crank has a uniform angular velocity
(B) crank has non-uniform velocity
(C) crank has uniform angular acceleration
(D) crank has uniform angular velocity and angular acceleration
(D) there is no such criterion
Corioli’s component acts________________?
(A) perpendicular to sliding surfaces
(B) along sliding surfaces
(C) somewhere in between above two
(D) unpredictable
(D) none of the above
Klein’s construction can be used to determine acceleration of various parts when the crank is at_________________?
(A) inner dead centre
(B) outer dead centre
(C) right angles to the link of the stroke
(D) at 45° to the line of the stroke
(D) all of the above
The magnitude of tangential acceleration is equal to____________________?
(A) velocity2 x crank radius
(B) velocityvcrankradius
(C) (velocity/crankradius)
(D) velocity x crank radius2
(D) none of the above
The direction of Corioli’s component of acceleration is the direction _____________________?
(A) of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link
(B) along the centripetal acceleration
(C) along tangential acceleration
(D) along perpendicular to angular velocity
(D) none of the above.
Angular acceleration of a link can be determined by dividing the___________________?
(A) centripetal component of acceleration with length of link
(B) tangential component of acceleration with length of link
(C) resultant acceleration with length of link
(D) all of the above
(D) none of the above
In a rigid link OA, velocity of A w.r.t. will be___________________?
(A) parallel to OA
(B) perpendicular to OA
(C) at 45° to OA
(D) along AO
(D) along OA