Engineering :: Theory of Machines

@ : Home > Mechanical Engineering > Theory of Machines

31.

In a cam and follower mechanism, for the uniform velocity of the followers the displacement curve will have

A.	No slope	B.	Constant slope
C.	Slope in positive direction only	D.	Slope in both positive and negative direction
E.	None of the above

32.

A point on a link connecting double slider crank chain, traces a

A.	Straight line path	B.	Circular path
C.	Parabolic path	D.	Hoperbolic path
E.	Elliptical path

33.

If a particle of a link has a velocity when changes both in magnitude and direction at any instant, then

A.	It must have only unidirectional acceleration	B.	It must have two components of acceleration e.g. centripetal, and tangential
C.	It must have three components of acceleration e.g. centripetal centrifugal and tangential	D.	It must have three components of acceleration e.g. centripetal, centrifugal and gravitational
E.	It must have four components of acceleration e.g. centripetal, centrifugal gravitational and tangential

34.

In a slider crank mechanism for l/r ratio of 4 the percentage of stroke converted by piston corresponding to 90? movement of crank from top centre will be

A.	0 percent	B.	Less than 50%
C.	More than 50%	D.	100%
E.	None of the above

35.

The number of instantaneous centres for a four bar chain mechanism would be

A.	2	B.	3
C.	4	D.	5
E.	6

36.

A dadial follower is

A.	One that reciprocates in the guides	B.	One that oscillates
C.	One in which the follower translates along an axis passing through the cam centre of rotation	D.	One in which the axis of the following movement is displaced from the cam centre
E.	None of the above

37.

In the cam mechanism, a mushroom follower is

A.	One which moves in zig-zag path	B.	One which moves irregularly with uniform movement of cam
C.	One provided with a flat face with a perfect flat plane	D.	One identical to a knife edge follower with spherical end
E.	One with cylindrical roller held by a pin to the follower assembly

38.

Cam size depends upon

A.	Cam operating speed	B.	Pitch cricle
C.	Base circle	D.	Prime circle
E.	Outer circle

39.

A pair is termed as a higher pair when relative motion between two elements of the pair is

A.	turning only	B.	sliding only
C.	rolling only	D.	partly sliding and partly turning

40.

A cylindrical type cam is one

A.	With cylindrical roller follower	B.	With cylindrical shape of follower
C.	With cricumferential contour cut in the surface of the cylinder which rotates about its axis	D.	With circular type motion of follower
E.	With disc type cam in which the position of the follower is determined by the radial distance from the cam axis.