Compressor Selection Quiz

Which of the following should be considered when selecting a type of compressor?

• Viscosity

• Discharge pressure

• Type of liquid being compressed

• All of the above

How is flow rate expressed?

• Kilopascals (kPa)

• Milliliters per second (ml/s)

• Cubic feet per minute (cfm)

• Pounds per square inch (psi)

Why are dynamic compressors more commonly used than positive displacement compressors?

• They are more sophisticated.

• Multiple fuel types can be utilized.

• They have a smaller capacity.

• They require less maintenance.

What dynamic compressors allow the gas to flow from the inlet, located near the suction eye, to the outer tip of the impeller blade?

• Axial compressors

• Rotary compressors

• Centrifugal compressors

• Reciprocating compressors

What type of compressor would you use if you needed a compressor for continuous-duty applications that require high volumes but relatively low pressures?

• Axial compressor

• Centrifugal compressor

• Rotary compressor

• Reciprocating compressor

What is the compression ratio of a compressor with a suction pressure of 800 psiA and a discharge pressure of 1600 psiA?

• 1.5

• 2

• 2.5

• 3

What compressors use a back-and-forth or up-and-down motion to pressurize and move gas through the device?

• Axial compressors

• Rotary compressors

• Centrifugal compressors

• Reciprocating compressors

Tags

NGSS.MS-PS2-1

What type of compressor would you use in applications where the operating conditions (flow/pressure) vary greatly?

• Axial compressor

• Centrifugal compressor

• Rotary compressor

• Reciprocating compressor

What happens to a dynamic compressor when the volume of gas entering the compressor drops below a critical flow rate?

• It may stall.

• It will operate more efficiently.

• It is compressing dirty gas.

• It will increase the temperature of the gas.

What can be an indicator of surging in a compressor?

• The compressor will stall.

• The compressor will vibrate severely.

• The compressor will be compressing dirty gas.

• The compressor will shut off.