Compressors, Gas Turbines and Jet Engines The maximum propulsion efficiency of a turbojet is attained at around following speed 550 km/hr 2400 km/hr 1050 km/hr 1700 km/hr 550 km/hr 2400 km/hr 1050 km/hr 1700 km/hr ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For slow speed large capacity compressor, following type of valve will be best suited Any of the above Mechanical valve of the Corliss, sleeve, rotary or semi rotary type Poppet valve Disc or feather type Any of the above Mechanical valve of the Corliss, sleeve, rotary or semi rotary type Poppet valve Disc or feather type ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For minimum work in multistage compression, assuming same index of compression in all stages Work done in all stages should be equal Work done in subsequent stages should increase Work done in subsequent stages should decrease Work done in first stage should be more Work done in all stages should be equal Work done in subsequent stages should increase Work done in subsequent stages should decrease Work done in first stage should be more ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In multistage compressor, the isothermal compression is achieved by By insulating the cylinder Employing inter-cooler By running compressor at very slow speed By constantly cooling the cylinder By insulating the cylinder Employing inter-cooler By running compressor at very slow speed By constantly cooling the cylinder ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on Pressure ratio Change in load Mass flow rate Stagnation pressure at the outlet Pressure ratio Change in load Mass flow rate Stagnation pressure at the outlet ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder) D₁/D₂ = p₂/p₁ None of these D₁/D₂ = p₁/p₂ D₁/D₂ = p₁ p₂ D₁/D₂ = p₂/p₁ None of these D₁/D₂ = p₁/p₂ D₁/D₂ = p₁ p₂ ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS