Q. The operation of lifts, rams and pumps make use of compressed air.

View solution

Q. A jet engine has

View solution

Q. A receiver in compressor installations is used to damp pressure waves in compressor discharge.

View solution

Q. The axial flow compressor is preferred in air-craft gas turbines because of

View solution

Q. Which of the following statement is correct as regard to centrifugal compressors?

View solution

Q. The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

View solution

Q. The process, which causes the air to enter the impeller blades of a centrifugal compressor at __________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

View solution

Q. In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.

View solution

Q. Maximum work is saved in a two stage reciprocating air compressor with incomplete intercooling.

View solution

Q. The mass of gas turbine per kW developed is about __________ as that of an I.C. engine.

View solution

Q. In a centrifugal compressor, the ratio of the __________ to the blade velocity is called slip factor.

View solution

Q. In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in

View solution

Q. The air is delivered __________ in one revolution in case of a three-lobbed rotor.

View solution

Q. The temperature of air at the beginning of the compression stroke is __________ the atmospheric temperature.

View solution

Q. The compressor efficiency is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.

View solution

Q. In a gas turbine, air is obtained from the atmosphere and compressed in an air compressor.

View solution

Q. In open cycle turbo-jet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the

View solution

Q. Gas turbine as compared to internal combustion engine

View solution

Q. The performance of air compressor at high altitudes will be __________ as compared to that at sea level.

View solution

Q. In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at

View solution