Theory of Machine
The unbalanced force due to revolving masses

Constant in magnitude and direction both
Varies in magnitude but constant in direction
Varies in magnitude and direction both
Varies in direction but constant in magnitude

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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?

The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
All of these
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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Theory of Machine
In order to give a complete secondary balance of a multi-cylinder inline engine,

The algebraic sum of the secondary forces must be equal to zero
None of these
Both (A) and (B)
The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero

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