298) In a steam engine, the distance by which the inner edge of the D-slide valve overlaps the steam port is called lead.

300) The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.

301) The stress induced in a body will be shear stress, when it is subjected to

302) A machine mounted on a single coil spring has a period of free vibration of t_p . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system wil

303) When a body is subjected to longitudinal vibrations, the stress induced in a body will be tensile or compressive stress.