NATE Exam Air Conditioning And Heat Pumps

• | Page

NATE Exam Air Conditioning and Heat Pumps Questions Verified With 100% Correct Answers Latest Which of the following factors affects a customer's level of comfort?

• Air movement
• Humidity
• Temperature
• All of the above

Correct answer: d (All of the above: air movement, humidity, temperature)

A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling-only system should be within ____% of this calculated value.

• ±10%
• +10%
• +15%
• +30%

Correct answer: c (+15%)

• | Page

The maximum sensible cooling capacity of a heat pump should be within ____% of the calculated sensible heat gain of a structure with a large heating load.

• ±10%
• +15%
• -25%
• +25%

Correct answer: d (+25%)

The combined output of a heat pump and its auxiliary heat should not exceed the calculated heat loss of a home by more than ____%.

• 10%
• 15%
• 20%
• 25%

Correct answer: b (15%)

What amount of auxiliary electric heat is needed when the output of a heat pump on a design day equals 18,800 Btuh and the heat loss of a home is 29,700 Btuh?

• | Page

• 2.1 kWh
• 3.2 kWh
• 5.0 kWh
• 10.9 kWh

Correct answer: b (3.2 kWh)

The three processes that transfer heat energy are conduction, convection, and ____.

• concentration
• radiation
• refraction
• static pressure

Correct answer: b (radiation)

Heat transfer that occurs when substances of different temperatures are in contact with each other is called ____.

• concentration
• conduction
• convection
• radiation

• | Page

Correct answer: b (conduction)

What effect does raising the pressure in a sealed system have on refrigerant?

• It becomes more difficult to subcool the liquid refrigerant
• It becomes more difficult to superheat the refrigerant vapor
• The refrigerant's boiling point decreases
• The refrigerant's boiling point increases

Correct answer: d (The refrigerant's boiling point increases)

What is the primary danger to people near an accidental refrigerant release or spill?

• Blurred vision caused by the refrigerant vapor coming in

contact with the eyes

• Changes in weather patterns caused by global warming
• Damage to the food chain caused by decreased ozone levels in

the stratosphere

• Suffocation caused by the heavier refrigerant displacing

oxygen in the air

Correct answer: d (Suffocation caused by the heavier refrigerant

displacing oxygen in the air)