Basic Concepts of Energy and Temperature

What is the purpose of a refrigeration system?

• To increase the temperature of a space

• To transfer heat from one location to another

• To convert solid to gas

• To measure energy consumption

What are the base units of the US Customary measurement system for distance and mass?

• Meter and gram

• Foot and pound

• Inch and kilogram

• Yard and ounce

What is the relationship between specific volume and density?

• Specific volume is directly proportional to density.

• Specific volume is the inverse of density.

• Specific volume and density are unrelated.

• Specific volume is equal to density.

What is the specific gravity of water?

• Less than one

• Greater than one

• Equal to one

• Zero

What is the conversion factor from pounds force to newtons?

• 1 lbₓ = 9.8 N

• 1 lbₓ = 4.45 N

• 1 lbₓ = 2.2 N

• 1 lbₓ = 1 N

How many foot-pounds per second are equivalent to one horsepower?

• 500 ft-lb/s

• 550 ft-lb/s

• 600 ft-lb/s

• 650 ft-lb/s

What is the power required to lift a mass of 100 kilograms at the rate of 10 meters per second?

• 9.8 kW

• 5.5 kW

• 7.2 kW

• 8.3 kW

What happens to atoms as the temperature of a substance increases?

• Atoms move more slowly.

• Atoms stop moving.

• Atoms move more rapidly.

• Atoms become larger.

How many spaces or degrees are there between the freezing and boiling points of water on the Celsius scale?

• 180

• 100

• 212

• 32

What happens to most substances when heat is added?

• They contract

• They expand

• They remain unchanged

• They become solid