MCQ on Inversions Of Single slider Crack mechanism-Rotary, Pendulum, Quick return Mechanism

 

A. Which of the following pairs are correctly matched? Select the correct answer using the codes given below the pairs. 

1. Whitworth quick return motion….. Single slider crank chain
2. Oldham’s coupling……………….. Four bar chain
3. Scotch Yoke……………………….Double slider crank chain

Codes: (a) 1 and 2 (b) 1, 2 and 3 (c) 1 and 3 (d) 2 and 3

Ans. (c)

B. Which one of the following mechanisms represents an inversion of the single slider crank chain? 

(a) Elliptical trammel
(b) Oldham’s coupling
(c) Whitworth quick return mechanism
(d) Pantograph mechanism

 Ans. (c)

C. In order to draw the acceleration diagram, it is necessary to determine the Corioli’s component of acceleration in the case of 
(a) crank and slotted lever quick return mechanism
(b) slider-crank mechanism

(c) four-bar mechanism

(d) pantograph

Ans. (a)

D. Which mechanism produces intermittent rotary motion from continuous rotary motion?

(a) Whitworth mechanism

(b) Scotch Yoke mechanism
(c) Geneva mechanism

(d) Elliptical trammel

 Ans. (c)

E. Which of the following are inversions of a double slider crank chain?
1. Whitworth return motion

2. Scotch Yoke
3. Oldham’s Coupling

4. Rotary engine
Select the correct answer using the codes given below:
Codes:
(a) 1 and 2 (b) 1, 3 and 4 (c) 2 and 3 (d) 2, 3 and 4

Ans. (c) Double Slider Crank mechanism

It has four binary links, two revolute pairs, two sliding pairs. Its various types are:
1. Scotch Yoke mechanism
2. Oldhams Coupling
3. Elliptical Trammel

F. Which of the following are the inversions of the double slider crank mechanism?
1. Oldham coupling

2. Whitworth quick return mechanism
3. Beam engine mechanism

4. Elliptic trammel mechanism
Select the correct answer from the codes given below.-
Codes: (a) 1 and 2 (b) 1 and 4 (c) 1, 2 and 3 (d) 2, 3 and 4

 Ans. (b) The inversions of the double slider crank mechanism are
(i) First inversion-Elliptic Trammel,
(ii) Second inversion-Scotch Yoke
(iii) Third inversion-Oldham’s coupling
Thus out of choices given, only 1 and 4 are correct.

G. The Whitworth quick return mechanism is formed in a slider-crank chain when the
(a) coupler link is fixed

(b) longest link is a fixed link
(c) slider is a fixed link

(d) smallest link is a fixed link

Ans. (d)

H.  Geneva mechanism is used to transfer components from one station to the other in
(a) an inline transfer machine

(b) a rotary transfer machine
(c) a linked line

(d) an unlinked flow line

Ans. (b)