Compressors, Gas Turbines and Jet Engines 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. Increased Reduced None of these Zero Increased Reduced None of these Zero ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity) (v₁² -v₂²)/g (v₁ - v₂)²/g (v₁² -v₂²)/2g (v₁ - v₂)²/2g (v₁² -v₂²)/g (v₁ - v₂)²/g (v₁² -v₂²)/2g (v₁ - v₂)²/2g ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A turboprop is preferred to turbojet because It can fly at high elevations It has high propulsive efficiency at high speeds It can fly at supersonic speeds It has high power for take off It can fly at high elevations It has high propulsive efficiency at high speeds It can fly at supersonic speeds It has high power for take off ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Isothermal compression though most efficient, but is not practicable because It does not increase pressure much It requires very big cylinder Compressor has to run at very slow speed to achieve it It is impossible in practice It does not increase pressure much It requires very big cylinder Compressor has to run at very slow speed to achieve it It is impossible in practice ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a jet engine, the air-fuel ratio is 2.0840277777778 2.5006944444444 1.2506944444444 1.6673611111111 2.0840277777778 2.5006944444444 1.2506944444444 1.6673611111111 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The work ratio of simple gas turbine cycle depends on Maximum cycle temperature Pressure ratio Minimum cycle temperature All of these Maximum cycle temperature Pressure ratio Minimum cycle temperature All of these ANSWER DOWNLOAD EXAMIANS APP
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