Exam C
Typical residential wall construction is built with 2" x 4" studs on _____ centers.
16"
The standard ceiling height in a single family residence is
8 feet
A load study that calculates the load for each individual room as well as the entire house is called
A room by room load calculation
What type of load study is recommended for duct design?
A room by room load study
A load study that treats the whole house as one big room is called
A shell or block load calculation
What is the most common residential load calculation that is accurate is
ACCA Manual J
How is a U factor calculated for a building panel built of several different materials?
Add the R values of the different materials and then find the reciprocal
Registers and grilles are typically installed
After most of the interior finish work is completed
The air conditioning system rough-in work is normally begins
After the house is framed and roof has been added
ACCA stands for
Air Conditioning Contractors of America
When a product has a Energy Star rating, it has been designed to
All of the above
In Manual J8, fenestration means
Anything that light can pass through
What effect does the daily range have on heat gain?
Areas with a high daily range can take advantage of natural cooling that occurs at night, so the cooling HTMs can be a little smaller
Infiltration calculations in Manual J8 are based on
Estimates of air changes in the house
The most common problems encountered with basements are related to
Excessive moisture in the basement
Common materials used for insulation in residential construction are
Fiberglass, cellulose, and foam
To improve humidity control for air conditioning system installed in humid climates, the air conditioning system selected should
Have a high latent cooling capacity and not be oversized
What is sensible heat gain?
Heat gain that causes the air temperature in the house to increase
What is latent heat gain?
Heat gain that results from increased moisture in the air in the house
What is the difference between heat loss and heat gain?
Heat loss occurs in the winter and heat gain occurs in summer
What is the difference between infiltration and ventilation?
Infiltration is air that leaks in while ventilation is drawn in on purpose
When permission is granted, a structural construction member may be cut at the ________ in order to allow a duct or pipe to pass through it.
Inside area
How is solar heat gain calculated in Manual J?
It is included in the window heat gain factors
What is the acronym LEED stand for?
Leadership in Energy and Environmental Design
Oversized equipment operates
Less efficiently than correctly sized equipment
The largest loads in commercial heat gain calculations include heat gain from
Lights, people, and machinery
The two types of load calculations outlined in Manual J8 are
Peak load procedure and average load procedure
The interior walls in most residences are made of
Sheetrock
How is the R value determined for a composite structure, such as a wall?
The R values of all the individual components are added together
Why is the cooling temperature difference often different than the difference between the indoor and outdoor temperatures?
The cooling temperature difference takes heat storage and daily temperature range into account
What is meant by the temperature daily range?
The daily range is the difference between the high and the low temperature during the day
What does the phrase "dried in" mean?
The house is weatherproof with exterior walls, roof, windows, and doors
The grains of moisture difference in the weather data tables are used for calculating
The latent heat gain
How is an HTM calculated?
U value times the temperature difference
The four major phases of construction in order are
foundation, framing, dried in, and finish work
In selecting the outside cooling design conditions for Manual J8, a temperature is chosen for each area which
is exceeded 1% of the year
In selecting the outside heating design conditions for Manual J8, a temperature is chosen for each area which
is exceeded 99% of the year
When refrigerant lines are installed under a poured concrete slab they are protected from physical harm
with a chase or conduit