Theory of Machine
The mechanism in which two are turning pairs and two are sliding pairs, is called a

All of these
Elliptical trammel
Scotch yoke mechanism
Double slider crank chain

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Theory of Machine
Which of the following statement is correct as regard to the difference between a machine and a structure?

All of these
The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work

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