Other Skilled Trades Sheet Metal and HVAC 2

Question 1

What tool is used to measure the static pressure within an HVAC duct system?

Accepted Answer

Manometer or magnehelic gauge

Answer

Anemometer

Answer

Multimeter

Answer

Thermometer

Question 2

What is the purpose of a condensate drain line on a central air conditioning system?

Accepted Answer

To remove water condensed from humid air on the evaporator coil

Answer

To drain condensed refrigerant from the outdoor unit

Answer

To drain the water heater

Answer

To remove rainwater from the condenser unit

Question 3

What gauge (thickness) of sheet metal is most commonly used for residential HVAC trunk ducts?

Accepted Answer

24 gauge

Answer

26 gauge

Answer

22 gauge

Answer

20 gauge

Question 4

What does the acronym CFM mean in HVAC?

Accepted Answer

Cubic Feet per Minute

Answer

Central Fan Module

Answer

Cooling Fan Mode

Answer

Combined Flow Measurement

Question 5

What is the minimum required clearance around an outdoor condenser unit for proper airflow and service access?

Accepted Answer

18 to 24 inches on all sides

Answer

6 inches on all sides

Answer

12 inches on service side, 6 inches on other sides

Answer

36 inches on all sides

Question 6

What does a TXV (thermostatic expansion valve) do in a refrigeration system?

Accepted Answer

Regulates the flow of refrigerant into the evaporator based on superheat

Answer

Compresses the refrigerant to high pressure

Answer

Separates liquid and vapor refrigerant

Answer

Measures the temperature of the refrigerant