Home » Mechanical Engineering » Compressors, Gas Dynamics and Gas Turbines

Compressor performance terminology: delivered air volume The term used for the volume of air delivered by a compressor (referred to standard free-air conditions) is: Choose the correct option.

Difficulty: Easy

Free air delivery
Compressor capacity
Swept volume
None of these

Correct Answer: Free air delivery

Explanation:

Concept/Approach
Free Air Delivery (FAD) denotes the delivered air volume referred back to standard free-air conditions. “Compressor capacity” is a general term and may be quoted as FAD, but the precise technical term for the delivered volume is FAD. “Swept volume” is the geometric displacement, not the delivered volume.

Final Answer
Free air delivery

← Previous Question Next Question→

More Questions from Compressors, Gas Dynamics and Gas Turbines

Applications of compressed air: identify the correct set Which of the following are common uses of compressed air in mechanical/thermal systems? Choose the correct option.
Compressor terminology: identify the parameter that equals work per cycle divided by stroke volume. Definition focus: In reciprocating compressors, the ratio (workdone per cycle)/(stroke volume) is called what? Choose the correct term.
Compressor fundamentals: select the correct statement among the following. Evaluate each statement about definitions and work in air compression, and choose the only correct one.
Clearance volume and volumetric efficiency in compressors: validate the statement for design practice. Statement to evaluate: Clearance volume is kept as small as possible because it adversely affects volumetric efficiency. Choose whether the statement is correct.
Perfect (complete) intercooling criterion in two-stage air compression: identify the temperature condition. Condition to classify perfect intercooling: Temperature of air leaving the intercooler is ________ the original atmospheric (inlet) air temperature. Choose the correct relation.
Pressure rise mechanism in a sliding vane blower: evaluate the two-stage explanation. Statement to evaluate: In a vane blower, the pressure increases first due to internal compression (decreasing cell volume) and then due to some backflow from the discharge until line pressure is reached. Choose whether the statement is correct.
Purpose of intercooling in multi-stage air compressors: choose the primary objective. Select the main reason intercoolers are used between compression stages.
Where does stagnation pressure rise occur in a centrifugal compressor? Identify the component(s) responsible for the increase in total (stagnation) pressure.
Rotary compressors used in aircraft: select the common type for high-throughput, high-speed applications. Choose the type of rotary compressor predominantly used in aeroplanes.
Effect of speed on centrifugal compressor performance at a given pressure ratio: choose the correct trend. For a centrifugal compressor operating at a fixed pressure ratio, what is the typical effect of increasing rotational speed?

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion