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ME Set-1
Compressors Gas dynamics and Gas Turbines
42

Compressors Gas dynamics and Gas Turbines MCQ with Answers

42) High air-fuel ratio in gas turbines

increases power output

improves thermal efficiency

reduces exhaust temperature

do not damage turbine blades

Answer is:

reduces exhaust temperature

Compressors Gas dynamics and Gas Turbines MCQ with Answers

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Related Compressors Gas dynamics and Gas Turbines MCQ with Answers

43) The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as

compressor efficiency

volumetric efficiency

isothermal efficiency

mechanical efficiency

Answer is:

volumetric efficiency

44) 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 intercooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocatin

D₁/D₂ = p₁p₂

D₁/D₂ = p₁/p₂

D₁/D₂ = p₂/p₁

none of these

Answer is:

D₁/D₂ = p₂/p₁

45) The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

compressor efficiency

volumetric efficiency

isothermal efficiency

mechanical efficiency

Answer is:

mechanical efficiency

46) The increase in pressure in a roots blower is entirely due to back flow of air.

Agree

Disagree

Answer is:

Agree

Compressors Gas dynamics and Gas Turbines MCQ with Answers

For more MCQ's Click Here

42) High air-fuel ratio in gas turbines

reduces exhaust temperature

Compressors Gas dynamics and Gas Turbines MCQ with Answers

Related Compressors Gas dynamics and Gas Turbines MCQ with Answers

43) The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as

volumetric efficiency

44) 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 intercooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocatin

D1/D2 = p2/p1

45) The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

mechanical efficiency

46) The increase in pressure in a roots blower is entirely due to back flow of air.

Agree

Compressors Gas dynamics and Gas Turbines MCQ with Answers

44) 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 intercooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocatin

D₁/D₂ = p₂/p₁