Deck 10: Heating, Ventilation, and Air-Conditioning Systems

Question 1

The _____ is the system component that is used to eject heat from the refrigerant to the surrounding outdoor environment.

A) condenser
B) releaser
C) heat transfer device
D) refrigerant meter

Answer 1

A

Question 2

Loose belts on an air distribution system can cause _____ .

A) condensation
B) over cooling
C) evaporator coil freezing
D) evaporation

Answer 2

C

Question 3

If the flames in the gas-fired furnace are yellow or are blue with yellow tips, _____ is present.

A) carbon monoxide
B) carbon dioxide
C) oxygen
D) acetylene

Answer 3

A

Question 4

What system component removes from the system the remaining heat and pressure previously introduced by the compressor?

A) Metering device
B) Inductor
C) Reducer
D) Vaporizing device

Question 5

An integral part of the operation of an air-conditioning system is the ability to remove condensate from the structure.

Question 6

As an absolute minimum, change filters _____ .

A) once per year when the system's output is reduced
B) monthly
C) at the beginning of the heating and cooling seasons
D) weekly

Question 7

In an oil burner, the more oil in the tank, _____ .

A) the harder it is on the burner
B) the less likely that condensation will form and accumulate in the oil
C) the less efficient it will be
D) the more likely that condensation will form and accumulate in the oil

Question 8

If a furnace belt is worn but not broken, it can be reinstalled on the system.

Question 9

The refrigeration process can be defined as the process of transferring heat from one location to another location.

Question 10

When removing a belt from a furnace use a screwdriver or similar tool to pry the belt loose.

Question 11

Only experienced contractors should work on boilers.

Question 12

There are three common types of furnaces. They are gas, electric, and oil.

Question 13

The HVAC system is strictly responsible for controlling the temperature of a structure.

Question 14

A(n) _____ deenergizes a circuit when a current leak to ground is sensed.

A) PASS
B) GFCI
C) metering device
D) ANSI sensor

Question 15

Quite often, the cause of belt slippage, breakage, and premature wear is misaligned pulleys.

Question 16

The _____ is the system component that raises the pressure and temperature of the refrigerant in the system.

A) carbon monoxide
B) converter
C) compressor
D) pressurizer

Question 17

To estimate the belt size of a furnace, the first step is to _____ .

A) Measure the length of the old belt
B) Measure the diameters of the drive pulley and the driven pulley and add the two diameter together
C) Measure the width of the old belt
D) Measure the center-to-center distance between the motor shaft and the blower shaft

Question 18

If a HVAC system appears to be OFF when it is turned on and operation is desired, check the main power supply to the piece of equipment.

Question 19

Typically, the fuel-burning portion of a gas-fired furnace system needs to be adjusted yearly.

Question 20

A(n) _____ is a device used to transfer heat from the inside of a structure to the outside by passing air over its coils.

A) dehydrator
B) refrigerator
C) vaporizer
D) evaporator