Compressors MCQs with answers Page - 3

Here, you will find a collection of MCQ questions on Compressors. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Admin • 828.03K Points
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Q. Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm . The air pressure will be

  • (A) 1.03 kg/cm^2
  • (B) 1.06 kg/cm^2
  • (C) 1.00 kg/cm^2
  • (D) 0.53 kg/cm^2

A

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Q. Axial flow compressor has the following advantage over centrifugal compressor

  • (A) larger air handling ability per unit frontal area
  • (B) higher pressure ratio per stage
  • (C) aerofoil blades are used
  • (D) higher average velocities

A

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Q. Axial flow compressor resembles

  • (A) centrifugal pump
  • (B) reciprocating pump
  • (C) turbine
  • (D) sliding vane compressor

A

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Q. Choose the correct statement

  • (A) gas turbine requires lot of cooling water
  • (B) gas turbine is capable of rapid start up and loading
  • (C) gas turbines have flat efficiency at part loads
  • (D) gas turbines have high standby losses and require lot of maintenance

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Q. Clearance volume in actual reciprocating compressors is essential

  • (A) to accommedate Valves in the cylinder head
  • (B) to provide cushioning effect
  • (C) to attain high volumetric efficiency
  • (D) to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head.

A

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Q. Compression efficiency is compared against

  • (A) ideal compression
  • (B) adiabatic compression
  • (C) botii isothermal and adiabatic compression
  • (D) isothermal compression

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Q. Cylinder clearance in a compressor should be

  • (A) as large as possible
  • (B) as small as possible
  • (C) about 50% of swept volume
  • (D) about 100% of swept volume

A

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Q. Diffuser in a compressor is used to

  • (A) increase velocity
  • (B) make the flow stream-line
  • (C) convert pressure energy into kinetic energy
  • (D) convert kinetic energy into pressure energy

A

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Q. During base load operation, the best method of controlling compressor is

  • (A) start-stop motor
  • (B) constant speed unloader
  • (C) relief valve
  • (D) variable speed

A

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Q. During peak load periods, the best method of controlling compressors is

  • (A) start-stop motor
  • (B) constant speed unloader
  • (C) relief valve
  • (D) variable speed

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