Theory of Machine
The partial balancing means

Best balancing of engines
All of these
Balancing partially revolving masses
Balancing partially reciprocating masses

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Theory of Machine
In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines

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

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Theory of Machine
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, the acceleration of the piston is _________ when the crank OC and connecting rod PC are at right angles to each other.

Zero
Any +ve value
Infinity
Any -ve value

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