residental heating, systems and equipment (110104g)

Question 1

What type of fuels do furnaces use?

Answer 1

Natural gas
Propane gas
Oil fuel
Solid fuel aka coal wood

Question 2

How many types of burner assemblies are there and what type?

Answer 2

There are two Upshot and Inshot

Question 3

What are the heat values of propane and natural gas?

Answer 3

Propane 2500 btu
Natural gas 1000 btu

Question 4

What does btu stand for?

Answer 4

British Thermal Unit

Question 5

What is used in high efficiency furnace in place of the draft hood.

Answer 5

Inducer motor

Question 6

What are some types of safety controls for furnaces?

Answer 6

Highlimit
CAD sensor censes light

Question 7

What type of furnace has the return air on top and supply air on bottom?

Answer 7

Counter flow

Question 8

What type of furnace has return air on the side and supply air on top?

Answer 8

Upflow common use

Question 9

What type of furnace has both return and supply on top of the unit?

Answer 9

Lowboy furnace

Question 10

What type of venting must be used on a high efficiency furnace?

Answer 10

Plastic 636 pvc as there is asidic chemicals in the condensation of a high efficiency furnace

Question 11

What type of furnace is 78% efficiency

Answer 11

A mid efficiency

Question 12

What type of furnace is 78% or lower

Answer 12

A low efficiency

Question 13

What type of furnace is 88% efficiency

Answer 13

High efficiency

Question 14

what is the heating value of electricity compared to BTUH

Answer 14

1 watt = 3.413BTU

Question 15

What are the two types of oil burners?

Answer 15

Vaporizing and Atomizing

Question 16

what oil burner is most commonly used today?

Answer 16

Atomizing

Question 17

what are sold fuels comprised off?

Answer 17

Wood Coal and Wood pellets

Question 18

What else is required for fuel to burn?

Answer 18

Oxygen

Question 19

where are some locations were air is required to burn fuel in the combustion process?

Answer 19

Air shutters, gas burners

Question 20

what is dilution air?

Answer 20

Air with contaminants that is cooled down in the draft hood before being expelled out.

Question 21

What is the main use of a heat exchanger?

Answer 21

allow the bad contaminants like co2 to escape without combining with the supplied air that heats the home

Question 22

What is a (CAD) sensor

Answer 22

(CAD) is a cadmium sulfide cell. this scene lights in furnaces that use solid fuel.

Question 23

what are the types of blower’s in a furnace

Answer 23

Direct drive and belt driven

Question 24

what is used in place of a draft hood for fuel furnaces as well as oil furnaces ?

Answer 24

Barometric damper`

Question 25

what does a furnace rely on even with and inducer motor to vent out?

Answer 25

Buoyancy

Question 26

what does a high efficiency furnace must have that others don’t?

Answer 26

Inducer motor
plastic venting
secondary heat exchanger

Question 27

what are the two types of fan coils?

Answer 27

Electrical or Liquid medium

Question 28

what is the recommended humidity in the home?

Answer 28

30-55%

Question 29

what does static electricity indicate?

Answer 29

that there is not enough humidity

Question 30

what are the types of humidifiers

Answer 30

there are four types
_ Pan evaporators
_ Bypass drum type
_ Bypass flow thru
_ atomizing

Question 31

what type of pads does a pan evaporator use?

Answer 31

wicking pads

Question 32

what is a humidistat?

Answer 32

a moisture controlled switch

Question 33

what are three main components of a Ac system?

Answer 33

• Evaporator coil or A coil
• condenser unit
• compressor unit

Question 34

What should never be connected into and HRV system?

Answer 34

Range hoods and dryer vents

Question 35

what does HRV stand for?

Answer 35

(HRV) heat recovery ventilator

Question 36

what is CFM?

Answer 36

(CFM) is cubic feet per minute

Question 37

what is the most common type of HVAC plenum system?

Answer 37

extended or reducing

Question 38

what is combustion air?

Answer 38

Combustion air is the air an appliance needs to replenish, for the air to be exhausted so that a vacuum effect doesn’t occur. Also helps to keep oxygen going to help with combustion

Question 39

what are byproducts of combustion?

Answer 39

• carbon monoxide
  -oxides of nitrogen
  -unburned carbon
  -soot

Question 40

what type of venting does a solid fuel furnace use?

Answer 40

a-vent
l-vent
masonry chimney are also allowed

Question 41

why do we need to vent buildings?

Answer 41

TO remove excessive moisture and to rid the house of combustion type gas

Question 42

what does exfiltration mean?

Answer 42

the air that escapes through gaps in the building like opening a window

Question 43

what does infiltration mean?

Answer 43

air that shapes in the building like through a window unwanted draft

Question 44

what is the required gas-to-air ratio for natural gas and propane gas?

Answer 44

10:1

Question 45

what is a cord of wood sold in?

Answer 45

4’ x 4’ x 8’

Question 45

what kind of switch is a thermostat?

Answer 45

Temperature sensing

Question 46

what is a radial HVAC system?

Answer 46

octopus-looking one that uses a counterflow furnace and is easy to install.

Question 47

when does and extended plenum have to be reduced?

Answer 47

after a maximum of 24’

Question 48

when is an appliance direct vent appliance?

Answer 48

when there is a combustion air hook up

Question 49

high efficiency furnaces are also known as what?

Answer 49

condensing furnace

Question 50

Three types of fireplaces?

Answer 50

-Built-in
-free standing
-gas insert