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