4Th Year Install Air Handling Systems

Front 1

Main cause of incomplete combustion?

Back 1

Lack of oxygen

Front 2

3 kinds of drafts for a gas furnace?

Back 2

Natural, induced draft, forced draft

Front 3

What is backdrafting and what causes it?

Back 3

Occurs becuase furnace is getting insufficient air

Front 4

What does a thermocouple do?

Back 4

Senses heat from a pilot flame

Front 5

What is scorching?

Back 5

Plugged up heat exchanger resulting in a flame rollout

Front 6

What should the setting on your thermostat anticipator match up with?

Back 6

The amperage of your gas valve

Front 7

How much more pressure loss do you get from flex duct compared with smooth duct?

Back 7

3X the pressure loss

Front 8

What are the two types of blower motors?

Back 8

Direct drive and belt drive

Front 9

What makes a high efficiency furnace more efficient?

Back 9

Longer heat exchanger

Front 10

What accessory do you need with a high efficiency furnace?

Back 10

Need a condensate pump or a drain as the furnace creates lots of moisture

Front 11

What requirements must you keep in mind when venting a high efficiency furnace?

Back 11

1/4 per foot slope back to the appliance

Support every 3 feet

Front 12

For sidewall vent locations what are some key numbers to remember?

Back 12

3 to 6’ from a gas regulator

7’ above a walkway

1’ above grade

4’ below a soffit

Front 13

1 gallon of fuel oil is equal to how many btu’s?

Back 13

140000

Front 14

1 cu ft of natural gas is equal to how many btu’s?

Back 14

1000

Front 15

Best location in house for a thermostat?

Back 15

Hallway, central in house, near your return

Front 16

What are the two ratings of fire dancers and when would you use them?

Back 16

11/2 and 3 hr ratings

Only use 3 hr when the partition has over a 3 hr rating

Front 17

What is the length of duct you need before a breakaway joint?

Back 17

6”

Front 18

For a fire damper sleeve how do you determine the gauge of metal you would use?

Back 18

Use same gauge as the duct it is connecting too

Front 19

What are the 3 types of fire dampers?

Back 19

Type A - blades in airstream

Type b - blades outside airstream(with hat section)

Type c - circle types

Front 20

What are the two damper types and what one is best for airflow?

Back 20

Parallel blade and opposed blade

Opposed blade is better for airflow

Front 21

What are spring loaded and gravity dampers also known as?

Back 21

Dynamic and static

Front 22

Describe an hrv?

Back 22

Back (Definition)

Front 23

What is safing?

Back 23

Blocking off a free area (usually with metal) where air could escape and go around a coil or something

Front 24

What is the cause of acid rain?

Back 24

Carbon dioxide and water.

Eg carbon coming out of a chimney

Front 25

What would determine the type of venting you needed for your appliance?

Back 25

The btu’s of the appliance

Aka how much heat is being exhausted out

Front 26

A vent, be vent and c vent clearances

Back 26

A vent - 1” to combustibles - stainless steel

B vent - 2” to combustibles - galvanized exterior and aluminium interior

C vent - 6” to combustibles - galvanized

Front 27

What are the 3 main reasons to clean the air?

Back 27

Protect building and system, people

Prevents contamination in industrial processes

Front 28

Group 1 filters

Back 28

Viscous impingement filters

Cardboard frame throw away filters commonly used in residential furnaces

Front 29

Group 2 filters

Back 29

Removes particles 5-10 microns and up

Pleated filters

Front 30

Group 3 filters

Back 30

Can filter 99% of the particles down to 0.3 microns

Some are electrostatically charged

Lots of surface area — often bag filters

Front 31

Group 4 filters

Back 31

HEPA filters

Designed for low velocity

Used for clean rooms and hospitals

Front 32

Used to remove smells from the air?

Back 32

Carbon filters or

Charcoal filters

Front 33

There are two general ways of cleaning contaminants from the air

Back 33

Increasing the ventilation air

Conditioning the air