Question 349Motor Plants - Assistant Engineer

70% to pass

Which of the following statements describes what will occur to the volume of water vapor as it is exposed to the lower temperatures existing in the device labeled "24" shown in the illustration? Illustration MO-0111

Diagram for USCG Motor Plants Assistant: Which of the following statements describes what will occur to the volume of...
AThe volume is increased as condensation occurs at the tube surfaces.
BThe volume will increase if the valve labeled "J" is opened excessively, resulting in an increase of the distiller absolute pressure.
CThe volume is greatly reduced, contributing to condensation within the condenser.
DThe latent heat of condensation is removed causing the volume to increase.
AI Explanation

The correct answer is C) The volume is greatly reduced, contributing to condensation within the condenser. The key is that as the water vapor is exposed to the lower temperatures in the device labeled "24", the volume of the water vapor will decrease. This is because the lower temperatures cause the water vapor to condense, resulting in a reduction in the overall volume of the water vapor. The condensation process removes the volume of the water vapor, contributing to the condensation within the condenser. The other options are incorrect because: A) Increasing volume due to condensation is the opposite of what occurs; B) Increasing the distiller pressure would not directly reduce the volume of the water vapor; and D) Removing latent heat of condensation would cause the volume to decrease, not increase.

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