Aux 1 Unit 6 Q2

1 / 7

How is the air temperature typically limited in the HP stage of a reciprocating air compressor?

C) By reducing the compressor's operating speed

D) By increasing the flow rate of the intake air

B) By using intercoolers between compression stages to cool the air

A) By increasing the bump clearance

2 / 7

What is the primary function of an aftercooler in a reciprocating air compressor system?

B) To cool the compressed air, reducing its temperature and causing moisture to condense

C) To heat the compressed air for better efficiency

D) To filter out solid particles from the air

A) To increase the air pressure after compression

3 / 7

What effect does an excessively large bump clearance have on the operation of a reciprocating air compressor?

D) It increases the temperature of the compressed air

C) It causes the piston to strike the cylinder head, leading to damage

A) It increases the compression ratio and improves efficiency

B) It reduces the compression ratio, leading to lower efficiency and reduced output pressure

4 / 7

What effect does an excessively small bump clearance have on the operation of a reciprocating air compressor?

B) It improves the efficiency and increases output pressure

A) It increases the risk of the piston striking the cylinder head, potentially causing damage

D) It reduces the temperature of the compressed air

C) It allows more air to be compressed per stroke

5 / 7

Why must the air temperature be limited in the high-pressure (HP) stage of a reciprocating air compressor?

A) To increase the air density

D) To improve the lubrication of moving parts

B) To prevent the risk of explosion or fire due to excessive heat

C) To reduce the load on the compressor motor

6 / 7

What does the term "bump clearance" refer to in a reciprocating air compressor?

C) The space between the crankshaft and the piston

D) The gap between the intake valve and the piston at bottom dead center (BDC)

A) The distance between the piston and cylinder wall at top dead center (TDC)

B) The clearance between the piston crown and cylinder head at top dead center (TDC)

7 / 7

How does the removal of moisture by an aftercooler benefit the operation of a compressed air system?

C) It reduces the energy consumption of the compressor

B) It prevents corrosion and water-related damage in the air lines and connected equipment

A) It increases the pressure of the air

D) It improves the color of the compressed air

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