Insulation

Question 1

A draft is a current of cold air that causes:

Answer 1

discomfort

Question 2

the largest factor in the thermal resistance of a wall is

Answer 2

insulation

Question 3

a ceiling shouold have an r factor equivalent to or more than

Answer 3

r-19

Question 4

a wall should have an r factor equivalent to or more than

Answer 4

r-13

Question 5

a wood frame raised floor should have an r factor equivalent to more than

Answer 5

r-13

Question 6

the percentage of efficiency in an average homes heating system is

Answer 6

50-65%

Question 7

moisture barriers should be placed ____ in the construction of a basement

Answer 7

below the floor

Question 8

ventilation for a crawl space is supplied

Answer 8

all year round

Question 9

heating is a probelm for split level houses because

Answer 9

each level must be treated seperately

Question 10

combustible material may be no closer than ____ from a furnace (Side and rear)

Answer 10

1 in

Question 11

a flue vent outlet or chimney must be a minimum of ____ above the roofs highest point

Answer 11

2 ft

Question 12

R represents

Answer 12

thermal resistance

Question 13

to meet title 24 energy standards for apartments and hotels, fans moving air to the outdoors must have

Answer 13

automatic back dampers

Question 14

the material which has the lowest R value per inch is

Answer 14

vermiculite

Question 15

which material has the highest R value per inch

Answer 15

polyurethane foam

Question 16

when the insulation material is blown into an attic or ceiling o the minimum R-19 rating, the best insulation materials are in what order

Answer 16

1.cellulose with a thickness of 5”
2.rock wool with a thickness of 6-1/2”
3.fiberglass with a thickness of 8-3/4”

Question 17

is rock wool is a better insulation material than fiberglass

Answer 17

yes

Question 18

The energy standars come under

Answer 18

title 24

Question 19

a minimum of ____ is neccessary for access to the front of the furnace

Answer 19

24 in

Question 20

the ability of various materials to conduct heat varies considerably. good conductors such as the metal frame of a window or poor conductors such as wood, gases and asbestos, transmit heat by conduction. This is a physical property called

Answer 20

thermal conductivity (k)

Question 21

____ is defined as the amount of heat (BTU) that passes through a material 1 inch thick and 1 sq ft in area in 1 hour with a temperature difference of 1 degree F. Between the outer and inner surface.

Answer 21

Thermal conductivity (K)

Question 22

____ is a meausre of teh rate of heat flow

Answer 22

conductance (U value)

Question 23

____ is a measure of a metrials ability to retard heat flow

Answer 23

Thermal resistance (R value)

Question 24

the ____ value indicates the ability of a specific material (i.e. 6” of mineral fiber sinsualing) to resist heat flow

Answer 24

R

Question 25

The higher the ____ value, the higher the insulating value

Answer 25

R

Question 26

Insulating materials depend upon trapped air within their construction for their insulating

Answer 26

qualities

Question 27

single strength glass has a U value (conductance, a measure of the rate of heat flow) of:

Answer 27

1.13

Question 28

the heat loss through cracks in the building is called what

Answer 28

inflitration

Question 29

on which side of teh wall or heated area of the building should the vapor barrier always be placed

Answer 29

warm

Question 30

Which of teh following is the best floor insulation

Answer 30

foil faced fiberglass

Question 31

whcih must be insulated in a new house

Answer 31

the floors, walls and ceilings

Question 32

what has the highest R-value

Answer 32

polyurethane

Question 33

what is the difference between blanket insulation and batt insulation

Answer 33

the length

Question 34

which of the following happens when insulation gets wet

Answer 34

-it compacts -it settles -it permanently loses its insulating value

Question 35

where do you get maximum heat gain in a house

Answer 35

from the windows

Question 36

which type of glass allows the least amount of cool air or warm air to escape

Answer 36

double glazed

Question 37

double paned windows best pay for themselves in which climates

Answer 37

extremely cold winters adn extremely hot summers

Question 38

how many motors will need to be installed for ventillation for a storage garage of 180,000 cu ft with motors which can vent 1000 cu ft per minute, if the air must turn over 4 times in 10 hours

Answer 38

3

Question 39

what provides the greatest R-Value and what is it

Answer 39

urethane boards R-value=6.2

Question 40

what is the U-value if the R-value of a material is .25 per inch and its thickness is 6 inches

Answer 40

.67

Question 41

for a mroe effective seal, the tabs of vapor barrier covering flexible insulation are stapled to

Answer 41

the inside edges of the framing members

Question 42

if insulation is covered on both sides , only one side acts as a vapor barrier and should face which side

Answer 42

the warm side

Question 43

reflective insulation generally consists of

Answer 43

aluminim foil

Question 44

which of the following best defines the term R

Answer 44

the resistance of a material to teh flow of heat

Question 45

ventilators are what

Answer 45

are left open all year

Question 46

when is reflective insulation effective

Answer 46

when facing air space of 3/4 inch deep

Question 47

vapor barriers

Answer 47

should not be installed on ceilings unless the roof pitch is less than 3 in 12

Question 48

squessing or compressing flexible insulation tightly into spaces

Answer 48

reduces its effectivness

Question 49

there should be an air space between the insulation and roof sheathing of at least ____ when insulation is placed between roof framing members

Answer 49

1-1/2 inches

Question 50

which of the following is the most efficient insulator

Answer 50

wood