ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2018

The purpose of thermostat in an engine cooling system is to

In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kj. If the calorific value of coal is 2050 $$\frac{kj}{KGg}$$, then boiler efficiency will be

A throttle governed steam engine develops 15 kW with 280 kg power of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW of power will be nearly

A fluid which obeys Newton’s law of viscosity is termed as

A water tank contains 1.3 m deep water. The pressure exerted by water per metre length of tank is

The gauge pressure at the surface of a liquid of density 900 $$\frac{Kg}{m^{3}}$$ is 0.4 bar. If the atmospheric pressure is $$1 \times 10^{5}pa$$ the absolute pressure at a depth of 50 M is

In Hydro-Electric plants, power transmitted through pipe is maximum when the head lost due to friction is

Reynolds number is ratio of Inertial forces to

A pelton wheel develops 1750 kW under a head of 100 mts while running at 200 rpm and discharging 2500 litres of water per sec. The unit power of wheel will be

Power required to drive a centrifugal pump is