HVAC CERTIFICATION QUESTIONS AND ANSWERS
List some of the different ways that homes and buildings may be heated. - Answers-
Wood, gas, oil, electric, solar, heat pumps, and geothermal.
What were some of the primary heating fuels that early civilizations used? - Answers-
Wood, peat, and coal remained the primary heating fuels for centuries
When is it believed that ice was first artificially made for food storage? - Answers- First
evidence of man making ice appeared more than 3,000 years ago, about 1000 b.c.
How did early man make ice? - Answers- The ice was produced in shallow clay plates,
about the size of a saucer. The water in these clay plates wept through the clay. This
water dampened the small straw mats holding the clay plates in racks a few feet above
the ground. The straw aided with evaporative cooling of the water. Under the right
conditions a thin film of ice would form overnight on each clay plate.
Why did some manufacturers spray water in factories in the early 1700s? - Answers-
Some manufacturers sprayed water in factories for cooling.
How did early Romans cool palaces? - Answers- The Romans packed ice and snow
between double walls in the emperor's palaces.
What do the terms environmental heating and air conditioning refer to? - Answers-
Primarily to the control of a space's air temperature
What does the term process heating and cooling refer to? - Answers- They are used to
aid in manufacturing or to keep equipment at the desired temperature.
When did central warm-air systems for residential and commercial applications become
well defined? - Answers- In 1908 the essential elements for heating, cooling,
humidifying, dehumidifying and filtering air were defined
Who developed what is referred to as modern air conditioning? - Answers- Willis
Carrier is often credited with the development of modern air conditioning.
When did mass air conditioning of homes with window units begin? - Answers- 1950s
Why is it important to freeze foods quickly? - Answers- The problem with freezing food
slowly is that when ice crystals form over time they become much larger. These large
sharp ice crystals grow through the cell walls of the food; and when the food thaws, all
of the nutrients in the food are allowed to drain away
Why do some businesses and/or local and state governments require criminal
background checks for HVACR workers? - Answers- To protect the public from
potentially dangerous individuals involved with in-home service work
List some of the different ways that homes and buildings may be heated. - Answers-
Wood, gas, oil, electric, solar, heat pumps, and geothermal.
What were some of the primary heating fuels that early civilizations used? - Answers-
Wood, peat, and coal remained the primary heating fuels for centuries
When is it believed that ice was first artificially made for food storage? - Answers- First
evidence of man making ice appeared more than 3,000 years ago, about 1000 b.c.
How did early man make ice? - Answers- The ice was produced in shallow clay plates,
about the size of a saucer. The water in these clay plates wept through the clay. This
water dampened the small straw mats holding the clay plates in racks a few feet above
the ground. The straw aided with evaporative cooling of the water. Under the right
conditions a thin film of ice would form overnight on each clay plate.
Why did some manufacturers spray water in factories in the early 1700s? - Answers-
Some manufacturers sprayed water in factories for cooling.
How did early Romans cool palaces? - Answers- The Romans packed ice and snow
between double walls in the emperor's palaces.
What do the terms environmental heating and air conditioning refer to? - Answers-
Primarily to the control of a space's air temperature
What does the term process heating and cooling refer to? - Answers- They are used to
aid in manufacturing or to keep equipment at the desired temperature.
When did central warm-air systems for residential and commercial applications become
well defined? - Answers- In 1908 the essential elements for heating, cooling,
humidifying, dehumidifying and filtering air were defined
Who developed what is referred to as modern air conditioning? - Answers- Willis
Carrier is often credited with the development of modern air conditioning.
When did mass air conditioning of homes with window units begin? - Answers- 1950s
Why is it important to freeze foods quickly? - Answers- The problem with freezing food
slowly is that when ice crystals form over time they become much larger. These large
sharp ice crystals grow through the cell walls of the food; and when the food thaws, all
of the nutrients in the food are allowed to drain away
Why do some businesses and/or local and state governments require criminal
background checks for HVACR workers? - Answers- To protect the public from
potentially dangerous individuals involved with in-home service work
