Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is an inversion of double slider crank chain ?
Explanation: A kinematic chain which consists of two turning pairs and two sliding pairs is known as double slider crank chain and elliptical trammels are such pairs.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is a turning pair ?
Explanation: When the two elements of a pair are connected in such a way that one can only turn or revolve about a fixed axis of another link, the pair is known as turning pair. A shaft with collars at both ends fitted into a circular hole, the crankshaft in a journal bearing in an engine, lathe spindle supported in head stock, cycle wheels turning over their axles etc. are the examples of a turning pair.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The motion transmitted between the teeth of gears in mesh is
Explanation: When the two elements of a pair have a line or point contact when relative motion takes place and the motion between the two elements is partly turning and partly sliding, and in mesh the gears have a point contact.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a
Explanation: When the kinematic pairs are coupled in such a way that the last link is joined to the first link to transmit definite motion (i.e. completely or successfully constrained motion), it is called a kinematic chain. In other words, a kinematic chain may be defined as a combination of kinematic pairs, joined in such a way that each link forms a part of two pairs and the relative motion between the links or elements is completely or successfully constrained.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
A kinematic chain is known as a mechanism when
Explanation: When one of the links of a kinematic chain is fixed, the chain is known as mechanism. It may be used for transmitting or transforming motion e.g. engine indicators, typewriter etc.