Quiz on Thermodynamics and Heat Transfer

Two locations where a cold air return should be installed:

• Open area of wall and low to the ground.

• Behind appliances and high on the wall.

• Open area of wall and high on the wall.

• Behind appliances and low to the ground.

Which of the following is a law of thermodynamics:

• Heat is a form of matter.

• Heat moves toward a place with higher intensity.

• Heat moves toward a place with lower intensity.

• Heat moves toward a place with a higher temperature.

Sensible heat describes ____________________.

• The quantity of heat.

• The heat required to change the state of a substance.

• The heat that can be felt and measured with a thermometer.

• The heat involved in chemical reactions.

Latent heat measures ________.

• The temperature of heat in a substance.

• The quantity of heat in a substance.

• The velocity of heat in a substance.

• The heat potential of a substance.

Latent heat is measured in ________.

• Degrees Celsius, Fahrenheit and Kelvin

• International System of Units

• British Thermal Units

• Board of Trade Unit

If 1 pound of water warms to 60 degrees F from 55 degrees F, what btu of latent heat will it have absorbed?

• 2.5

• 5

• 10

• 15

What is the amount of heat energy required to evaporate 1 pound of water?

• 370 btu

• 570 btu

• 770 btu

• 970 btu

In an air conditioning and refrigeration system, what occurs in an evaporator?

• The refrigerant absorbs the latent heat.

• The refrigerant evaporates latent heat.

• Latent heat is condensed.

• Latent heat is released.

In an air conditioning and refrigeration system, what occurs in a condenser?

• The refrigerant absorbs the latent heat.

• The refrigerant releases the latent heat.

• Latent heat is pressurized.

• Latent heat is increased.

In a sealed system, pressure and temperature ______________.

• are inversely proportional

• go in opposite directions up and down

• are equal

• follow each other up and down