Question 1

Which modes of heat transfer occur in a vertical air space?

Accepted Answer

Convection

Question 2

When an aluminum foil is used in attic spaces, it is

Accepted Answer

A) laminated to fiberglass insulation. 
B) laminated to outside- facing surface of roof sheathing. 
C) laminated to ceiling gypsum board. 
D) laminated to inside- facing surface of roof sheathing. 
E) sandwiched between ceiling gypsum board and fiberglass insulation. 
A) laminated to fiberglass insulation. 
B) laminated to outside- facing surface of roof sheathing. 
C) laminated to ceiling gypsum board. 
D) laminated to inside- facing surface of roof sheathing. 
E) sandwiched between ceiling gypsum board and fiberglass insulation.

Question 3

The International Energy Conservation Code provides

Accepted Answer

A) two alternative paths of compliance. 
B) four alternative paths of compliance. 
C) three alternative paths of compliance. 
D) five alternative paths of compliance. 
E) none of the above. 
A) two alternative paths of compliance. 
B) four alternative paths of compliance. 
C) three alternative paths of compliance. 
D) five alternative paths of compliance. 
E) none of the above.

Question 4

Name the three modes of heat transfer. Which of these modes is the dominant mode in building assemblies?

Accepted Answer

Conduction, convection and radiation are

Question 5

In which climate situations would you consider insulating a concrete slab- on- ground?

Accepted Answer

In cold climates only where th

Question 6

Explain the concept of continuous envelope insulation in IECC.

Accepted Answer

Continuous insulation means that the ext

Question 7

Draw a plan of the following wall assembly and then determine its total R- value, Rt. Starting from the outside face of the wall, the assembly consists of the following layers:
4- in. nominal (3- 5/8- in. actual)brick veneer 2- in. air space (cavity)
0.75- in.- thick extruded polystyrene sheathing
2 × 6 studs with 5- 1/2- in.- thick fiberglass insulation 1/2- in.- thick gypsum wallboard
(Note: In calculating the value of Rt, ignore the presence of wood studs and assume that the entire layer consists fiberglass insulation.)

Accepted Answer

To draw a plan of the wall assembly, we

Question 8

Using sketches and notes, explain the difference between:
a. U- value and U- factor
b. U- factor and C- factor

Accepted Answer

a. U-value and U-factor:
The U-value and

Question 9

What does the acronym LTTR stand for and to which materials is it related?

Accepted Answer

LTTR is an acronym for long- t

Question 10

Both, thermal mass and insulation affect heat flow through the envelope. Discuss their roles in energy consumption.

Accepted Answer

Insulation reduces energy consumption in

Question 11

The IECC consists of two totally independent documents that are bound together into one document. Name the two documents.

Accepted Answer

1. Commercial energy

Question 12

Which of the following steel stud wall assemblies gives a higher overall R- value? In both assemblies, the total amount of insulation is R- 15.

Accepted Answer

A) Assembly B has an exterior insulating sheathing of R- 3 and within- stud insulation of R- 12 
B) Assembly A has an exterior insulating sheathing of R- 5 and within- stud insulation of R- 10 
A) Assembly B has an exterior insulating sheathing of R- 3 and within- stud insulation of R- 12 
B) Assembly A has an exterior insulating sheathing of R- 5 and within- stud insulation of R- 10

Question 13

Explain why the wetting of an insulating material reduces its R- value. In which situations is this fact is important?

Accepted Answer

Water is a good conductor of heat, i.e.,

Question 14

The IECC has mandatory and non- mandatory provisions. The non- mandatory provisions can be complied with using three alternative paths, while the mandatory provisions must be complied with as given in IECC. Name the three alternative, non- mandatory paths.

Accepted Answer

1. Prescriptive path

Question 15

Air is a good thermal insulator, provided that it exists in large volumes.

Accepted Answer

A) True 
 B)False

Question 16

Is the requirement for continuous envelope insulation an inviolable provision in IECC? Explain.

Accepted Answer

The requirement for continuous envelope

Question 17

Of the two polystyrene foam insulations, one foamed with air and the other foamed with HCFC gas, which one is made by the extrusion process and which one is made by the molding process?

Accepted Answer

Expanded polystyrene (EPS)is m

Question 18

For energy conservation, materials with high thermal mass are effective in climates in which the heat flow through the building envelope is

Accepted Answer

A) absent during a large part of the year. 
B) unidirectional within a 24- h period during a large part of the year. 
C) bidirectional within a 24- h period during a large part of the year. 
A) absent during a large part of the year. 
B) unidirectional within a 24- h period during a large part of the year. 
C) bidirectional within a 24- h period during a large part of the year.

Question 19

Which of the following insulating materials is available in the form of rigid boards?

Accepted Answer

A) Extruded polystyrene 
B) Fiberglass 
C) Insulating concrete 
D) Rock wool 
E) None of the above 
A) Extruded polystyrene 
B) Fiberglass 
C) Insulating concrete 
D) Rock wool 
E) None of the above

Question 20

What is the difference between U- factor and F- factor and between U- factor and C- factor?

Accepted Answer

The U- factor refers to the U- value of

Exam 5: Properties of the Envelope-I Thermal Properties

Which modes of heat transfer occur in a vertical air space?

When an aluminum foil is used in attic spaces, it is

The International Energy Conservation Code provides

Name the three modes of heat transfer. Which of these modes is the dominant mode in building assemblies?

In which climate situations would you consider insulating a concrete slab- on- ground?

Explain the concept of continuous envelope insulation in IECC.

Using sketches and notes, explain the difference between: a. U- value and U- factor b. U- factor and C- factor

What does the acronym LTTR stand for and to which materials is it related?

Both, thermal mass and insulation affect heat flow through the envelope. Discuss their roles in energy consumption.

The IECC consists of two totally independent documents that are bound together into one document. Name the two documents.

Which of the following steel stud wall assemblies gives a higher overall R- value? In both assemblies, the total amount of insulation is R- 15.

Explain why the wetting of an insulating material reduces its R- value. In which situations is this fact is important?

The IECC has mandatory and non- mandatory provisions. The non- mandatory provisions can be complied with using three alternative paths, while the mandatory provisions must be complied with as given in IECC. Name the three alternative, non- mandatory paths.

Air is a good thermal insulator, provided that it exists in large volumes.

Is the requirement for continuous envelope insulation an inviolable provision in IECC? Explain.

Of the two polystyrene foam insulations, one foamed with air and the other foamed with HCFC gas, which one is made by the extrusion process and which one is made by the molding process?

For energy conservation, materials with high thermal mass are effective in climates in which the heat flow through the building envelope is

Which of the following insulating materials is available in the form of rigid boards?

What is the difference between U- factor and F- factor and between U- factor and C- factor?

An Overview of the Building Delivery Process How Buildings Come Into Being

Design and Constructions Regulations

Loads on Buildings

Load Resistance the Structural Properties of Materials

Properties of the Envelope-II Air and Water Vapor Control

Fire and Smoke-Related Properties

Acoustical Properties of Materials

Principles of Joints and Sealants Expansion and Contraction Control

Principles of Sustainable Construction

Soils and Excavations

Below-Grade Construction Foundation Systems and Basements

Materials for Wood Construction-I Lumber

Materials for Wood Construction-Ii Engineered Wood Products, Fasteners, and Connectors

Wood Light-Frame Construction-I

Wood Light-Frame Construction-II

Structural Insulated Panel Construction

Material Steel and Steel Components

Structural Steel Construction

Cold-Formed Steel Construction

Lime, Portland Cement, and Concrete

Concrete Construction-I Formwork, Reinforcement, and Slabs-On-Ground

Concrete Construction-II Site-Cast and Precast Concrete Framing Systems

Masonry Materials-I Mortar and Brick

Masonry Materials-II Concrete Masonry Units, Natural Stone, and Glass Masonry Units

Masonry and Concrete Bearing Wall Construction

Exterior Wall Cladding-I Principles of Rainwater Infiltration Control

Exterior Wall Cladding-II Masonry, Precast Concrete, and Gfrc

Exterior Wall Cladding-III Stucco, Adhered Veneer, Eifs, Natural Stone, and Insulated Metal Panels

Glass, Glazing, and Light-Transmitting Plastics

Windows and Doors

Exterior Wall Cladding-Iv Wall System in Glass

Roofing-I Low-Slope Roofs

Roofing-I Steep Roofs

Stairs

Floor Coverings

Ceilings

Filters