Acentrifugal pump delivers 227 m^3 /hr of water from a source 4 meters below the pump centre line to a pressure tank whose pressure is 2.8 kg/cm2 . friction loss estimates are 2 meters in the suction line and 1 metre in the discharge line. the diameter of the suction pipe is 250 mm and the discharge pipe is 200 mm. find: a) the water horsepower b) the kw rating of the driving motor if the pump efficiency is 70%

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79