26408-20 HVAC Controls

The MOST widely used fossil fuel is

• Coal

• Fuel oil

• Propane

• Natural gas

Which of the following principle states that heat is created in one place, and carried to another by means of air or water?

• Heat-creation principal

• Heat-transfer principal

• Heat-movement principal

• Heat-transplant principle

The tubing that carries heat-Laden refrigerant gas from the evaporator to the compressor is known as the

• Discharge line

• Liquid line

• Hot gas line

• Suction line

A conventional thermostat should NOT be thrown into a regular trash because it

• May contain mercury

• Is easy to repair

• Has a 10-year warranty

• Contains sulfuric acid

In the cooling system, the heat exchanger where the heat absorbed by the refrigerant is transferred to the cooler outdoor air is known as a(n)

• Compressor

• Condenser

• Evaporator

• Expansion device

Automatic changeover thermostats have a minimum interlock setting, also known as the

• Differential

• Compensator

• Deadband

• Evaporator

thermostats with bimetal, sensing elements typically use a combination of copper or brass and

• Elinvar®️

• Nickel

• Invar®️

• Aluminum

If a lockout relay becomes defective, it should be replaced with an exact duplicate, sometimes called a(n)

• Induced-draft relay

• Control relay

• Time-delay, relay

• Impedance relay

The thermostat terminal that is connected to the reversing valve control, and a heat pump is

• O

• G

• R

• Y

A limit switch that senses flame outside of the heat exchanger is known as a

• Rollout switch

• Thermocouple

• Fire stat

• Thermistor