Resi Heating Systems And Equipment

Question 1

What is a furnace?

Answer 1

A piece of equipment that transforms fuel into heat energy and distributes that energy through the HVAC system.

Question 2

Two components that are part of the furnace that help burn fuel?

Answer 2

Gas valves and burner system.

Question 3

What unit is heat measured in?

Answer 3

BTU (British thermal unit)

Question 4

BTU is defined as

Answer 4

British thermal unit.

Question 5

What is the manifold designed to do?

Answer 5

Distribute gas evenly to a number of orifaces to regulate fuel flow.

Question 6

List the two different types of gas burners.

Answer 6

Inshot burner & Upshot burner.

Question 7

What is the heating value of natural gas?

Answer 7

1000 BTU/cu ft

Question 8

What is the heating value of propane?

Answer 8

2500 BTU/ cu ft

Question 9

What is the heating value of electricity compared to BTUH’s?

Answer 9

1 watt = 3.413 Btuh

Question 10

What are two different types of oil burners?

Answer 10

Vaporizing or atomizing burners.

Question 11

Which oil burner is most common?

Answer 11

Atomizing type burner.

Question 12

List solid fuels.

Answer 12

Wood, coal and wood pellet.

Question 13

When burning fuel what else is REQUIRED?

Answer 13

Oxygen

Question 14

Where are the two locations that air is required to burn a fuel in the combustion process?

Answer 14

Combustion chamber & burners

Question 15

Where is dilution air used?

Answer 15

Draft hood

Question 16

What does the heat exchanger designed to do?

Answer 16

It separates the air that circulates through the house from the products and combustion.

Question 17

If there is a flame failure in an older style furnace, what is going to stop the fuel flow?

Answer 17

Pilot light sensor.

Question 18

What does the cadmium sulfide cell sense?

Answer 18

Senses light and is used as a safety device.

Question 19

What are the two different types of blowers in a furnace?

Answer 19

Belt driven & direct drive.

Question 20

What is CW & CCW

Answer 20

Clock wise & counter clock wise

Question 21

If a furnace is lower than 78% efficient, what would this type of furnace be called?

Answer 21

Low efficient furnace.

Question 22

If the furnace is between 77-88% efficient this is classified as?

Answer 22

Mid efficient furnace.

Question 23

What is used in place of a draft hood for oil furnaces?

Answer 23

Barometric damper.

Question 24

What is used in place of a draft hood when the furnace is over 78% efficient?

Answer 24

Inducer fan or inducer motor.

Question 25

A high efficient furnace uses two heat exchangers, which one condenses the water Vapour?

Answer 25

Secondary heat exchanger.

Question 26

This furnace brings air in the top and out of the bottom, so what type of furnace is this?

Answer 26

Counter flow furnace.

Question 27

What furnace is most common?

Answer 27

Highboy or upflow furnace.

Question 28

What are the two main types of fan coils?

Answer 28

Electricity or liquid medium.

Question 29

What type of switch is a thermostat?

Answer 29

Temperature activated switch.

Question 30

What should the humidity level of a home be?

Answer 30

30% - 55%

Question 31

What is static electricity in a home indicating?

Answer 31

Dry air.

Question 32

4 types of humidifiers?

Answer 32

1. Pan/Evaporative types
2. Bypass drum style
3. Bypass flow through
4. Atomizing

Question 33

What type of switch is a humidistat?

Answer 33

Moisture activated switch.

Question 34

What should not be connected to an HRV?

Answer 34

Dryer vents & Range hoods.

Question 35

CFM refers to

Answer 35

Cubic feet per minute

Question 36

Fpm refers to

Answer 36

Feet per minute