Athin-walled cylindrical pressure vessel of inner radius 20 mm, wall thickness 2mm and closed ends is subjected to an internal pressure of 8 mpa. a twisting moment (torque) t is now applied to the ends of the vessel. find the value of t at which compressive stresses will start to appear in the vessel wall.

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.

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery