Manual J

Question 0

What is the maximum winter humidity for a building with design temperature of 10 FDB while maintaining inside temperature of 72 FDB. Assume double pane windows.

Answer 0

37%

Page 107

Question 1

Given a watts to Btu of 3.4. What is the sensible gain of 20- 60watt bulbs? (2040, 4080, 9180, 10200) BTU

Answer 1

4080

Question 2

Supply duct in vented attic is insulated with R6 insulation and heat is supplied by a heat pump. What is the duct loss multiplier to determine the contribution to heating load (design temp is 22 degrees) (0%, 5%, 10%, 15%)

Answer 2

5%

Question 3

How many inches of mineral wool are required to equal an R19 rated wall?

Answer 3

6”

Question 4

For 1” thick homogenous material, thermal conduction is measured in ______ per Hours, Square Feet, and Degrees in Fahrenheit.

Answer 4

BTU

Question 5

BTUH required for a 5 gallon, gas fired, hoodless coffee urn is ________.

Answer 5

7500 BTU

Question 6

Thermal resistance of a wall combined with the effects of convection as expressed in BTU per sq ft per degrees F is known as an ____ value.

Answer 6

R-Value

Question 7

Pipe insulation must be used when surface temperature is below the _____ __________ temperature.

Answer 7

dew point

Question 8

Existing wall is rated R15. If new material of R18 is added, what is the new “U” value?

Answer 8

.04

Question 9

A duct is insulated with 4”insulation rated 0.33 BTU Inch per hour sq ft degrees. If it is replaced with insulation with conductivity of 0.20 BTU, how many inches will be needed to equal R15? (2, 3, 4, 5) inches

Answer 9

3 inches

Question 10

Question about break room 112?

Answer 10

45 BTU/H

Question 11

A room has an automatic clothes washer. A gas fired furnace is added. What provisions must be made?

Answer 11

Add make up air

Question 12

Typical  R values are 
R11
R13
R19
R30

Answer 12

R11
R13
R19
R30

Question 13

The relationship between R and U value is U=1/R
1 divided by R11= .091
1 divided by R13= 0.77
1 divided by R19= 0.53
what is the U value of R30

Answer 13

0.33

Question 14

R15 wall is going to add R8. What will the U value be?

R15 + R8 = R23

Answer 14

1 divided by 23 = 0.043

Question 15

Square Footage x U-Value x TD = ______

Answer 15

BTU

Question 16

Wall is 10Ft x 12Ft.
U-Value is .053
TD is 20

What is the BTU rating? Hint: Sq Ft x U value x TD =

Answer 16

125

Question 17

Wall is 12’6 x 13’4. R-value is R15. TD is 0-72 degrees.
(690, 725, 750, 810)

What is BTU rating. Hint: Convert R-value to U-value

Answer 17

725