Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves

Parallel to its axis
Perpendicular to its axis
None of these
In a circle about its axis

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, this method will

Cause withdrawing or throttling of steam
Reduce length of effective stroke of piston
Reduce maximum opening of port to steam
All of the listed here

ANSWER DOWNLOAD EXAMIANS APP