Steam Boilers, Engines, Nozzles and Turbines
The function of a piston in a steam engine is

To guide motion of the piston rod and to prevent it from bending
None of these
To convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment
To transfer motion from the piston to the cross-head

ANSWER DOWNLOAD EXAMIANS APP

Steam Boilers, Engines, Nozzles and Turbines
In an ideal impulse turbine, the

Axial velocity at inlet is equal to that at the outlet
Relative velocity at the inlet of the moving blade is equal to that at the outlet
Absolute velocity at the inlet of moving blade is equal to that at the outlet
Whirl velocity at inlet is equal to that at the outlet

ANSWER DOWNLOAD EXAMIANS APP