Exam 2: Temperature and Pressure Fundamentals

Evaporation is being discussed.Technician A says heat is lost when evaporation occurs.Technician B says the rate of evaporation is not affected by air movement.Who is correct?

Briefly define the term voltage.

All of the following statements about oxygen are true,EXCEPT:

A change in pressure can affect the ________ of a substance.

Technician A says convection is the process of heat moving to cold.Technician B says convection also involves the movement of heat upwards.Who is correct?

The acceptable comfort range for the human body is:

Heat is the absence of cold.

The ideal relative humidity is between ____ and ____ percent.

What unit of measurement is resistance in an electrical circuit meased in?

Identify the components of a molecule of water.Explain why the water molecule differs from its component elements.

What is the unit of measurement used to measure latent heat?

The radiation process is not affected by the surrounding air temperature.

Technician A says latent heat is hidden heat.Technician B says latent heat is required for a change of state.Who is correct?

The heat added to a vapor causing it to become warmer is called:

Heat required to turn water into steam is latent heat.

Technician A says convection may occur in liquids and gases.Technician B says conduction can occur between two substances that are at different temperatures.Who is correct?

Gravity causes warm air to sink.

Sensible heat can be measured with

Constant removal of body heat takes place by three processes.Name them.

List some air conditioning service equipment that is usually supplied by the shop.