Mid West Hvac: Gas Heat Exam Practice
Part 1 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
What is the relationship between energy, work, and power? - CORRECT ANSWER Energy is
the ability to do work, work is the result of transferring energy, and power is the rate at which the
work is accomplished.
What is the relationship between potential and kinetic energy? - CORRECT ANSWER Kinetic
and potential energy may be converted in either direction.
What is a battery an example of? - CORRECT ANSWER A battery is an example of potential
energy.
What happens when atoms join to make a new molecule? - CORRECT ANSWER Energy is
absorbed or released in the process.
What are three forms of energy used in heating and air conditioning? - CORRECT ANSWER
Electrical, magnetic, and mechanical energy.
What are coal, oil, and natural gas examples of? - CORRECT ANSWER Nonrenewable energy
sources.
What units are most commonly used to measure large quantities of heat in the United States? -
CORRECT ANSWER Therms.
Why is the number 3.41 significant in figuring BTU? - CORRECT ANSWER One watt
produces 3.41 BTU per hour.
How is the cooling capacity of air-conditioning equipment expressed in the United States? -
CORRECT ANSWER In tons.
What is electricity? - CORRECT ANSWER Electricity is the flow of electrons.
, Why is the voltage of electricity increased for transmission over long distances? - CORRECT
ANSWER It reduces the amount of electricity loss.
What is the rating used to compare the efficiency of air-conditioning units? - CORRECT ANSWER
SEER (Seasonal Energy Efficiency Ratio).
What are common heat quantities arranged from smallest to largest? - CORRECT ANSWER
Calorie, BTU, kilocalorie, therm.
How many watts equal one horsepower of work? - CORRECT ANSWER 746 W = 1 hp.
What are the three broad categories of fuel gases? - CORRECT ANSWER Natural,
manufactured, and liquified petroleum.
What elements make up common fuel gases? - CORRECT ANSWER Hydrogen and carbon.
What is natural gas? - CORRECT ANSWER Natural gas is lighter than air.
What is propane? - CORRECT ANSWER Propane is heavier than air.
What is combustion air? - CORRECT ANSWER Air that is mixed with the fuel before it is
ignited.
What are the three things necessary for combustion? - CORRECT ANSWER Fuel, oxygen, and
heat.
How do water and carbon dioxide relate to combustion? - CORRECT ANSWER Both are
stable and safe products of combustion.
How do gas furnaces ensure the production of a blue flame? - CORRECT ANSWER The use
of gas spuds and a manifold.
Part 1 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
What is the relationship between energy, work, and power? - CORRECT ANSWER Energy is
the ability to do work, work is the result of transferring energy, and power is the rate at which the
work is accomplished.
What is the relationship between potential and kinetic energy? - CORRECT ANSWER Kinetic
and potential energy may be converted in either direction.
What is a battery an example of? - CORRECT ANSWER A battery is an example of potential
energy.
What happens when atoms join to make a new molecule? - CORRECT ANSWER Energy is
absorbed or released in the process.
What are three forms of energy used in heating and air conditioning? - CORRECT ANSWER
Electrical, magnetic, and mechanical energy.
What are coal, oil, and natural gas examples of? - CORRECT ANSWER Nonrenewable energy
sources.
What units are most commonly used to measure large quantities of heat in the United States? -
CORRECT ANSWER Therms.
Why is the number 3.41 significant in figuring BTU? - CORRECT ANSWER One watt
produces 3.41 BTU per hour.
How is the cooling capacity of air-conditioning equipment expressed in the United States? -
CORRECT ANSWER In tons.
What is electricity? - CORRECT ANSWER Electricity is the flow of electrons.
, Why is the voltage of electricity increased for transmission over long distances? - CORRECT
ANSWER It reduces the amount of electricity loss.
What is the rating used to compare the efficiency of air-conditioning units? - CORRECT ANSWER
SEER (Seasonal Energy Efficiency Ratio).
What are common heat quantities arranged from smallest to largest? - CORRECT ANSWER
Calorie, BTU, kilocalorie, therm.
How many watts equal one horsepower of work? - CORRECT ANSWER 746 W = 1 hp.
What are the three broad categories of fuel gases? - CORRECT ANSWER Natural,
manufactured, and liquified petroleum.
What elements make up common fuel gases? - CORRECT ANSWER Hydrogen and carbon.
What is natural gas? - CORRECT ANSWER Natural gas is lighter than air.
What is propane? - CORRECT ANSWER Propane is heavier than air.
What is combustion air? - CORRECT ANSWER Air that is mixed with the fuel before it is
ignited.
What are the three things necessary for combustion? - CORRECT ANSWER Fuel, oxygen, and
heat.
How do water and carbon dioxide relate to combustion? - CORRECT ANSWER Both are
stable and safe products of combustion.
How do gas furnaces ensure the production of a blue flame? - CORRECT ANSWER The use
of gas spuds and a manifold.
