Process Plant Equipment Quiz

What is the main purpose of a compressor?

• To transport liquid through a pipe

• To cool down the gas

• To decrease the pressure of gas

• To increase the pressure of air

What is the major method of actuation of industrial machines using compressed air?

• Hydraulic actuation

• Pneumatic actuation

• Electric actuation

• Mechanical actuation

What are the advantages of rotary screw compressors compared to piston-type compressors?

• Low noise level

• Many moving parts

• High maintenance cost

• Require more energy

What is surge in a centrifugal compressor and what can it cause?

• Increase in flow rate

• Mechanical damage

• Energy recovery

• Decrease in pressure

How can surge in a compressor be prevented?

• Increase pressure

• Use more energy

• Reduce compressor speed

• Increase inlet flow

How does the relative density (molecular weight) affect the performance of centrifugal compressors?

• Decrease in compressor speed

• Flow rates should be decreased

• Flow rates should be increased

• No effect on flow rates

What are the four parts of the cycle in a reciprocating compressor?

• Inlet, outlet, compression, expansion

• Compression, discharge, expansion, intake

• Expansion, compression, discharge, intake

• Intake, discharge, compression, expansion

What is the most important specification to consider when selecting a compressor?

• Pressure Rating

• Gas Composition

• Compressor Speed

• Suction Design

What are some common problems associated with air compressors?

• Air leak, oil leak, insufficient pressurization

• High energy efficiency, low noise level, good maintenance

• No start-up issues, high airflow, low vibration

• Broken part, high maintenance cost, low temperature

What is the behavior of gas molecules dependent on?

• Pressure and temperature

• Pressure and volume

• Temperature and quantity

• Volume and quantity