WorksheetsChapter 6: Energy and Matter Review
Total questions: 20
Worksheet time: 10mins
What is the difference between mass and weight?
Mass is the force of gravity acting on an object, while weight is the quantity of matter in an object.
Mass is measured in kilograms, while weight is measured in Newtons.
Mass is affected by gravity, while weight is not.
Weight is the force of gravity acting on an object, while mass is the quantity of matter in an object.
Which of the following is used to convert pounds to kilograms?
1 lb = 2.2 kg
1 lb = 0.454 kg
1 lb = 0.5 kg
1 lb = 0.393 kg
What is the relationship between density and specific volume?
Density is the volume occupied by a unit mass; specific volume is the mass per unit volume.
Density is mass per unit volume; specific volume is the volume per unit mass.
Both are the same.
Neither is relevant to HVAC.
What is the freezing point of water?
0°C (32°F)
100°C (212°F)
-1°C (30°F)
-273.15°C (0 Kelvin)
Which temperature point is the highest at which a substance can exist as a liquid?
Freezing point
Absolute zero
Critical temperature
Boiling point
What does Boyle’s Law describe?
The relationship between temperature and volume at constant pressure.
The relationship between pressure and volume at constant temperature.
The relationship between volume and temperature at constant pressure.
The relationship between total pressure and partial pressures in a gas mixture.
According to Charles’s Law, what happens to the volume of a gas when temperature increases at constant pressure?
The volume increases.
The volume decreases.
The volume remains unchanged.
The volume fluctuates.
What does Dalton’s Law state?
The total pressure of a gas mixture is equal to the sum of the partial pressures of the individual gases.
The pressure of a gas is inversely proportional to its volume.
The volume of a gas is directly proportional to its temperature.
The volume of a gas is inversely proportional to its pressure.
Which of the following describes the difference between heat and temperature?
Heat measures the average kinetic energy of particles, while temperature measures the total energy of the system.
Heat is the total energy of molecular motion, while temperature is the average energy of molecular motion.
Temperature and heat are the same.
Heat and temperature are not related in HVAC systems.
What is the unit of heat in the SI system?
Joule
Celsius
Kelvin
Fahrenheit
Which of the following best describes latent heat?
Heat that changes the temperature of a substance without changing its state.
Heat that changes a substance's state without changing its temperature.
Heat required to raise the temperature of 1 pound of water by 1°F.
The energy of motion of particles in a substance.
What is the term for the amount of moisture in the air?
Latent heat
Humidity
Specific volume
Sensible heat
Which of the following best describes evaporation?
A gas turning into a liquid.
A liquid turning into a gas.
A solid turning into a liquid.
A solid turning into a gas.
What does the term "specific heat capacity" refer to?
The heat required to raise the temperature of 1kg of water by 1°C.
The total heat energy required for phase changes.
The amount of heat added or released in the refrigerant cycle.
The amount of heat required to raise the temperature of 1 pound of water by 1°F.
What is a BTU?
The amount of heat required to raise 1 lb of water by 1°C.
The amount of heat required to raise 1 lb of water by 1°F.
The amount of heat required to raise 1 kg of water by 1°C.
A unit of pressure in HVAC systems.
What is the term for the lowest possible temperature, where molecular motion stops?
Freezing point
Absolute zero
Critical temperature
Boiling point
Which of the following describes the heat transfer method of conduction?
Transfer of heat through direct contact.
Transfer of heat through electromagnetic waves.
Transfer of heat through the movement of air.
Transfer of heat through liquid or gas state changes.
Which of the following best describes convection?
Heat transfer through direct contact.
Heat transfer through electromagnetic waves.
Heat transfer through the movement of air.
Heat transfer through phase changes.
Which of the following is the temperature at which air becomes saturated with moisture and condensation begins?
Dew point
Freezing point
Critical temperature
Absolute zero
What is a ton of refrigeration?
The total heat energy removed by an HVAC system.
A measurement of heat in BTUs per hour.
The cooling capacity required to melt one ton of ice in 24 hours.
The maximum temperature an HVAC system can reach.
