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ABCD is a mechanism with link lengths AB = 200, BC = 300,...

Q.  
ABCD is a mechanism with link lengths AB = 200, BC = 300, CD = 400 and DA = 300. Which one of the following links should be fixed for the resulting mechanism to be a double crank mechanism?


Answer & Explanation

Double crank mechanism is achieved by fixing the shortest link. Among given AB has shortest length.

Thus correct option is: A.

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More Questions Theory of Machines:

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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


Answer & Explanation

Q.  
A mechanism has n number of links (including fixed links) and f number of pins or revolute pairs or pairs that permit one degree of freedom. According to Gruebler’s equation the number of degrees of freedom is given by

A. F = 3(n−1)−2f

B. F = 2(n−1)−3f

C. F = 3(n−1)+ 2f

D. F = 2(n−1)+ 3f


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Universal joint is used to connect two shafts which are

A. Non-parallel and intersecting shafts and misaligned shafts

B. Parallel and intersecting shafts and misaligned shafts

C. Parallel and intersecting shafts and aligned shafts

D. Non-parallel and intersecting shafts and aligned shafts


Answer & Explanation

Q.  
Which one of the following statements is not correct?

A. Hooke’s joint is used to connect two rotating co-planar, non-intersecting shafts

B. Hooke’s joint is used to connect two rotating co-planar, intersecting shafts

C. Oldham’s coupling is used to connect two parallel rotating shafts

D. Hooke’s joint is used in the steering mechanism for automobiles


Answer & Explanation
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