Inversion of a kinematic chain relative to some other links is a property of the chain and is not that of the mechanism.

Ina kinematic inversion, the relative motions between links of the mechanism change as different links are made the frame by turns.

A

True

B

False

Consider the following statements: 1. A kinematic chain is the combination of kinematic pairs joined in such a way that the relative motion between them is completely constrained. 2. The degree of freedom of a kinematic pair is given by the number of independent coordinates required to completely specify the relative movement. Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

The figure shows a mechanism with 3 revolute pairs (between the links 1 and 2, 2 and 3, and 3 and 4) and a prismatic pair (between the links 1 and 4). Which one of the four links should be fixed to obtain the mechanism that forms the basis of the quick-return mechanism widely used in a shaper?

A

Link 1

B

Link 2

C

Link 3

D

Link 4

Statement I: In four-bar chain, whenever all four links are used, with each of them forming a turning pair, there will be continuous relative motion between the two links of different lengths. Statement II: For a four-bar mechanism, the sum of the shortest and longest link lengths is not greater than the sum of remaining two links.

A

Both Statement I and Statement II are individually true, and Statement II is the correct explanation of Statement I

B

Both Statement I and Statement II are individually true, but Statement II is not the correct explanation of Statement I

C

Statement I is true, but Statement II is false

D

Statement I is false, but Statement II is true

Study the following statements.i) The displacement method is more useful when degree of kinematic indeterminacy is greater than the degree of static indeterminacy.ii) The displacement method is more useful when degree of kinematic indeterminacy is less than the degree of static indeterminacy.iii) The force method is more useful when degree of static indeterminacy is greater than the degree of kinematic indeterminacy.iv) The force method is more useful when degree of static indeterminacy is less than the degree of kinematic indeterminacy.The correct answer is

A

(i) and (iii)

B

(ii) and (iii)

C

(i) and (iv)

D

(ii) and (iv)

The method to obtain different types of mechanisms by fixing different links in a kinematic chain is known as inversion of mechanism. True or False.

A

True

B

False

In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links

A

will remain same

B

will change

C

will not occur

D

none of the mentioned

If the relative motion between two links of a mechanism is pure sliding, then the relative instantaneous center for these two links does not exist.

A

True

B

False

In the slider chain mechanism, which is an inversion of simple engine mechanism, the number of links is-

A

6

B

5

C

4

D

3

Which of the following are examples of forced closed kinematic pairs? 1. Cam and roller mechanism 2. Door closing mechanism 3. Slider crank mechanism 4. Automotive clutch operating mechanism Select the correct answer using the codes given below:

A

1,2 and 4

B

1 and 3

C

2,3 and 4

D

1,2,3 and 4

Inversion of a kinematic chain relative to some other links is a property of the chain and is not that of the mechanism.

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