Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Negative throughout
Negative during major portion of the stroke
Positive during major portion of the stroke
Positive throughout

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Theory of Machine
In order to give a complete secondary balance of a multi-cylinder inline engine,

None of these
Both (A) and (B)
The algebraic sum of the secondary forces must be equal to zero
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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Theory of Machine
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will

Oscillate with decreasing amplitude
Oscillate with increasing time period
Oscillate with constant amplitude
Return to equilibrium position without oscillation

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