plumbing science pp4

Which of the following is NOT a method by which heat can be transferred?

• Conduction

• Convection

• Radiation

• Insulation

What is conduction in the context of heat transfer?

• The movement of heat through a vacuum

• The transfer of heat through direct contact from one molecule to another

• The emission of heat in the form of electromagnetic waves

• The movement of heat through a fluid induced by fluid external to the heat source

Which material is a very good thermal conductor?

• Aluminum

• Steel

• Copper

• Plastic

What happens when a copper tube is heated in terms of conduction?

• The copper tube cools down immediately

• The heat is evenly distributed throughout the tube

• The heat travels along the tube from one molecule to the next

• The copper tube becomes an insulator

Which of the following materials is considered a good conductor of heat?

• Wood

• Polystyrene

• Copper

• Still Air

What is the relationship between thermal and electrical conductivity?

• Good thermal conductors are poor electrical conductors

• There is no relationship between thermal and electrical conductivity

• Good thermal conductors are also good electrical conductors

• Only metals can be good thermal and electrical conductors

According to the material, what can bad conductors be effectively used as?

• Insulators

• Semiconductors

• Resistors

• Capacitors

What is the mode of heat transfer described as the movement of heat via infrared light, from one body to another without heating the space in between?

• Conduction

• Convection

• Radiation

• Insulation

What is the effect of the color of a material's surface on its heat absorption capabilities?

• It has no effect

• It increases thermal conductivity

• It affects how much heat is absorbed

• It changes the material's texture

Why are cars in hot countries often colored white?

• To increase speed

• To reflect heat

• To reduce cost

• To improve durability