Chapter 136

Question 0

External heat gains include those by:
A) infiltration
B) ventilation
C) solar radiation
D) all of the above

Answer 0

D) all of the above

Question 1

Explain the meaning of thermal resistance

Answer 1

Thermal resistance (R) is the value of a given material’s ability to resist heat transfer or flow. Simply stated, the higher the R value, the greater the insulating value, or resistance to heat flow.

Question 2

A wind velocity of \_\_\_\_ is used to calculate the winter infiltration heat losses.
A) 24 km/h (15 mph)
B) 1 km/h (9.4 mph)
C) 30 km/h ( 18.8 mph)
D) 36 km/h (22.5 mph)

Answer 2

A) 24 km/h (15 mph)

Question 3

The heat given off by light fixtures is not greatly affected by the:
A) current flow
B) room temperature
C) wind speed
D) ambient temperature

Answer 3

B) room temperature

Question 4

If the outside air temperature is -18*C and the inside air temperature is 21*C, a double pane window filled with argon will be \_\_\_\_ warmer than a single pane window.
A) 40*C
B) 20*C
C) 31*C
D) 50*C

Answer 4

C) 31*C

I believe that answer to be wrong. The paragraph in the book states: “a single pane window with an outside temperature of -18C and inside air temperature of 21C will have a glass temperature of -9C. A double pane window with argon gas will have a glass temperature of 13C, some 22*C warmer.

Question 5

The amount of heat loss by conduction, convection, radiation, and infiltration is directly affected by the:
A) room temperature
B) room size
C) ambient temperature
D) wind velocity

Answer 5

D) wind velocity