Grubler’s Criterion for Plane Mechanisms MCQ

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Whitworth quick return mechanism is obtained by inversion of

ক
slider crank mechanism

খ
kinematic chain

গ
five link mechanism

ঘ
roller cam mechanism
An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has

ক
2 links

খ
3 links

গ
4 links

ঘ
5 links
For a kinematic chain to be considered as mechanism

ক
two links should be fixed

খ
one link should be fixed

গ
none of the links should be fixed

ঘ
there is no such criterion
The main disadvantage of the sliding pair is that it is

ক
bulky

খ
difficult to manufacture

গ
wears rapidly

ঘ
both a and c
In the following equation to determine whether or not the given chain in kinematic, higher pair is treated equivalent to

ক
to determine whether or not the given chain in kinematic, higher pair is treated equivalent to ] two lower pairs and an additional links

খ
L = 2/3(J + 2)

গ
L = 2/3(J + 2)

ঘ
L = 2/3(J + 2)
A chain comprises of 5 links having 5 joints. Is it kinematic chain?

ক
Yes

খ
No

গ
It is a marginal case

ঘ
None of the mentioned
Hart mechanism has

ক
8 links

খ
6 links

গ
4 links

ঘ
5 links
Peaucellier mechanism has

ক
8 links

খ
6 links

গ
4 links

ঘ
5 links
Open pairs are those which have

ক
point or line contact between the two elements when in motion

খ
surface contact between the two elements when in motion

গ
elements of pairs not held together mechanically

ঘ
two elements that permit relative motion
The approximate straight line mechanism is a

ক
4 bar linkage

খ
6 bar linkage

গ
8 bar linkage

ঘ
3 bar linkage