Steam enters a converging nozzle at 800 kPa and 280C with negligible velocity. If the process is isentropic, estimate the minimum pressure that can be reached in such a nozzle and the cross-sectional area at the nozzle throat at this pressure for a flow rate of 0.75 kg/s.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way