Deck 2: Heating Load Estimates

Question 1

The design heating load of a building is an estimate of the rate at which a building loses heat during the near minimum outdoor temperature.

Answer 1

True

Question 2

The number of heating degree days that accumulate in a 24-hr.period is the difference between 72 F and the average outdoor air temperature during that period.

Answer 2

False

Question 3

Many residential and commercial buildings have concrete floor slabs rather than crawl spaces or full basements.Downward heat losses are relatively small from interior areas of the floor slab.

Answer 3

True

Question 4

The proper approach is to perform a heat load calculation ____.

A) factoring seasonal requirements
B) for each room
C) for the entire building
D) based on the owner's usage

Question 5

Heat flow from a basement or slab-on-grade foundation is determined by complex interactions between the building, the surrounding soil, insulation materials (if present), and the ____.

A) depth of the foundation
B) orientation of the structure
C) air temperature above grade
D) planned usage of the room

Question 6

Knowing how many MMBtu a building requires over a typical heating season is not of much use to most owners.

Question 7

The R-value of a material is not directly proportional to its thickness.

Question 8

Heat is lost through all building surfaces that separate heated space from unheated space.

Question 9

All building surfaces that separate heated space from unheated space.(walls, windows, ceilings, doors, foundation, etc.) are called the ____ of the building.

A) thermal envelope
B) heat load variables
C) resistance factors
D) thermal qualifiers

Question 10

It is relatively easy to assess the location and magnitude of all the air leakage paths in a typical building.

Question 11

The heating load is ____ of heat flow from the building to the outside air.

A) a rate
B) the quantity
C) the cost
D) one unit

Question 12

A boiler, furnace, or small space heater operating on the same fuel, at the same assumed conversion efficiency, would produce the same estimated annual heating cost.

Question 13

Once the____ price of the fuel options has been calculated, a simple multiplication determines the estimated seasonal heating cost in dollars.

A) effective
B) unit
C) advertised
D) estimated

Question 14

The U-value of any material or assembly is simply the reciprocal of the ____ of that material or assembly.

A) heat load
B) temperature
C) exposure
D) R-value

Question 15

The U-value of any material or assembly is simply the reciprocal of the R-value of that material or assembly.

Question 16

To estimate the annual space heating cost provided by an electrically operated heat pump, its average COP must be factored in.What does COP stand for?

A) coefficient of performance
B) capacity of production
C) calculation of price
D) correlation of parts

Question 17

One common method of factoring local weather conditions into estimates of heating energy use is based on heating ____.

A) prognostication
B) thermometers
C) historical records
D) degree days

Question 18

An object's thermal ____ can be defined as its thickness in the direction of heat flow divided by its thermal conductivity.

A) reactivity
B) reproduction
C) reciprocity
D) resistance

Question 19

One can assume that individual room heating loads are proportional to room floor area.

Question 20

In addition to conduction losses, heat is also carried out of buildings by uncontrolled air leakage.This is called ____ heat loss.

A) anti-thermal
B) infiltration
C) insulation
D) environmental