71. A cam with a roller follower would constitute following type of pair
A.Lower pair
B.Higher pair
C.Open pair
D.Close pair
72. The approximate straight line mechanism is a
A.Four bar linkage
B.6 bar linkage
C.8 bar linkage
D.3 bar linkage
73. Open pairs are those which have
A.Point or line contact between the two elements when in motion
B.Surface contact between the two elements when in motion
C.Elements of pairs not held together mechanically
D.Two elements that permit relative motion
74. Peaucellier mechanism has
A.Eight links
B.Six links
C.Four links
D.Twelve links
75. Hart mechanism has
A.Eight links
B.Six links
C.Four links
D.Twelve links
76. A chain comprises of 5 links having 5 joints. Is it kinematic chain ?
A.Yes
B.No
C.It is a marginal case
D.Data are insufficient to determine it
77. The main disadvantage of the sliding pair is that it is
A.Bulky
B.Wears rapidly
C.Difficult to manufacture
D.(a) and (b) above
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