Aux 1 Unit 6 Q2

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

Explanation: If the bump clearance is too small, there is a significant risk that the piston could strike the cylinder head at top dead center, which could cause serious damage to both the piston and the cylinder head.

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

Explanation: The air temperature in the HP stage must be limited to prevent the risk of explosion or fire, as excessive heat can ignite the oil mist or other flammable materials present in the compressor system.

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

Explanation: The aftercooler cools the compressed air after it leaves the final compression stage. As the air cools, the moisture it contains condenses into liquid form, which can then be removed from the system, reducing the risk of corrosion and improving air quality.

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

Explanation: Intercoolers are used between compression stages to cool the air before it enters the next stage, reducing the overall temperature and preventing overheating in the high-pressure stage.

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

Explanation: If the bump clearance is too large, the compression ratio decreases, which leads to lower efficiency and a reduced output pressure from the compressor, as the air is not compressed as effectively.

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

Explanation: Bump clearance refers to the small clearance between the piston crown and the cylinder head when the piston is at top dead center (TDC). This clearance is critical for preventing mechanical contact and allowing for the proper compression of air.

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

Explanation: Removing moisture from the compressed air helps prevent corrosion and water-related damage in the air lines, valves, and other pneumatic equipment, leading to longer equipment life and more reliable operation.