Principles of heat

Identify the three methods of heat transfer.

• Conduction, convection, and radiation.

• Evaporation, condensation, and precipitation.

• Diffusion, osmosis, and filtration.

• Absorption, reflection, and transmission.

Methods of heat transfer are applied in the plumbing system in which of the following ways?

• They help in heating water in pipes through conduction, convection, and radiation.

• They are only used for cooling water in the system.

• They prevent any heat loss in the plumbing system.

• They are not relevant to plumbing systems at all.

Pressure calculation is defined as:

• Force divided by area

• Area divided by force

• Force multiplied by area

• Force plus area

Heat transfer: There are three methods by which heat can be transferred. Fill in the blank: One method of heat transfer is _________.

• Conduction

• Evaporation

• Photosynthesis

• Magnetism

Heat transfer: There are three methods by which heat can be transferred. Fill in the blank: One method of heat transfer is _________.

• Convection

• Evaporation

• Sublimation

• Deposition

Heat transfer: There are three methods by which heat can be transferred. Fill in the blank: One method of heat transfer is _________.

• Radiation

• Evaporation

• Filtration

• Condensation

What is conduction? Conduction happens when heat travels through or along a ______ (one molecule to the next).

• material

• liquid

• gas

• vacuum

Which of the following is a very good thermal conductor?

• Plastic

• Copper

• Wood

• Glass

Plastics tend not to be good thermal ________.

• conductors

• insulators

• metals

• liquids

Heating a copper tube to solder, or heating coil in a DHWC, are examples of which principle of heat transfer?

• Conduction

• Convection

• Radiation

• Insulation