Heat Loss Heat Gains

Front 1

Design temperature difference is the difference from indoor design temperatures to outdoor design temperatures (T or F)

Back 1

True

Front 2

Which way does heat travel?

Back 2

Hot to cold

Front 3

Effective temperature is defined as

Back 3

How a person feels at a certain temperature

Front 4

Air movement affects the temperature you feel (T or F)

Back 4

True

Front 5

What four factors affect building environments?

Back 5

1) building envelope

2) mechanical systems

3) occupants

4) appliances

Front 6

Which material has a greater R-value?

A) glass fibre

B) double-glazed windows

C) cement

D) sheet metal

Back 6

Glass fibre

Front 7

HTM is a factor used to calculate:

Back 7

BTUH per square foot

Front 8

Gross wall calculations are completed by multiplying:

Back 8

Length x width of the wall, including all penetrations

Front 9

What three factors are used to find the correct infiltration factor?

Back 9

Site exposure

Penetrations

Air tightness

Front 10

Ducts passing through unconditioned spaces must be:

Back 10

Insulated

Front 11

All ducts passing through unconditioned spaces will have heat losses (T or F)

Back 11

True

Front 12

Radiant heat adds a load to a building (T or F)

Back 12

True

Front 13

Solar radiation will change the:

Back 13

Outdoor design temperatures

Front 14

What is the default used when calculating heat gains for glass?

Back 14

No shades or drapes are used

Front 15

1 ton of cooling = (how many BTUs per hour?)

Back 15

12,000 Btuh

Front 16

How many CFM is recommended by most manufacturers for cooling output?

Back 16

400 CFM per minute

Front 17

List four factors that you must consider when designing an HVAC system.

Back 17

A) proper duct size

B) ducts running through unconditioned spaces

C) zoning for houses with special heating and cooling needs

D) combustion and dilution air

Front 18

How far away from the wall should a supply air outlet be located?

Back 18

8"

Front 19

What is the formula used to calculate the circulation airflow rate?

Back 19

CFM = volume of the house x (1.5 air changes per hour ÷ 60 minutes)

Front 20

What is the minimum number or return air inlets allowed per floor?

Back 20

1

Front 21

List the five areas where return air may not be installed

Back 21

A) kitchens

B) bathrooms

C) laundry rooms

D) utility rooms

E) enclosed crawl spaces that are used to supply combustion air for furnaces or other appliances

Front 22

What should the output of heat equipment be between?

Back 22

100% and 140%

Front 23

What should the cooling output be between?

Back 23

80% and 125%

Front 24

To determine cooling CFM required you would...

Back 24

400 CFM x 2 tons = 800cfm