Deck 13: HVAC

Question 1

The Internal Residential Code (IRC) requires that dwellings in cold climates must have heating equipment that can maintain indoor temperature at a minimum of ____ degrees.

A) 60
B) 64
C) 68
D) 72

Answer 1

68

Question 2

Individual heating and cooling systems that serve multiple areas of the home are referred to as ____ systems and those that serve only sections or single rooms are called local or non-distributed systems.

A) universal
B) distributed
C) non-local
D) whole house

Answer 2

whole house

Question 3

Electric furnaces use ____ to convert electricity into heat.

A) reduction
B) inversion
C) resistance
D) conduction

Answer 3

resistance

Question 4

____ coolers are commonly referred to as swamp coolers due to the algae growth on early models.

A) Nonevaporative
B) Direct evaporative
C) Indirect evaporative
D) Condensing

Question 5

____ ventilation removes moisture, odors, and pollutants directly at the source. Bath exhaust fans and kitchen range hoods are the most common examples.

A) Indirect
B) Partial
C) Direct
D) Spot

Question 6

____ duct systems have large ducts installed through the center of the house with smaller ducts run off the trunks to supply individual rooms.

A) Trunk and branch
B) Radial
C) Spider
D) Plenum

Question 7

Traditionally, duct system design locates supply registers at the ____.

A) exterior doors
B) exterior walls
C) interior windows
D) interior walls

Question 8

Loads are calculated using a system known as Manual ____, created by ACCA.

A) D
B) J
C) S
D) T

Question 9

The key decision when using hydronic heating is the choice between radiant floors, wall mounted radiators, or individual ____.

A) fan-coils
B) boilers
C) pipes
D) grilles

Question 10

The formula for ____ is the average annual heating divided by average annual power consumption.

A) AFUE
B) HSPF
C) SHF
D) SEER

Question 11

____ CO poisoning is used to indicate those cases when individuals are exposed on more than one occasion to the gas-usually at comparatively low concentrations.

A) Acute
B) Developmental
C) Chronic
D) Incidental

Question 12

A higher SEER means ____.

A) lower efficiency and higher energy bills
B) better efficiency and higher energy bills
C) lower efficiency and lower energy bills
D) better efficiency and lower energy bills

Question 13

In Florida, using ceiling fans combined with raising a home's temperature ____° F will generate about a 14% net savings in annual cooling energy use.

A) 1
B) 2
C) 3
D) 4

Question 14

Oversized air conditioners are prone to ____ cycling, a condition where they turn on and drop the indoor temperature very quickly, then turn off.

A) short
B) quick
C) reduced
D) sporadic

Question 15

The 2009 IECC requires a minimum of ____ in each house.

A) one clock setback thermostat
B) two clock setback thermostats
C) one standard thermostat
D) two standard thermostats

Question 16

Similar in function to space heaters, stoves provide heat from a single, central location using solid wood, wood pellets, or ____ as fuel.

A) wheat pellets
B) corn
C) fiberboard "logs"
D) compressed cardboard

Question 17

All types of direct heating equipment convey heat without ducts, and the products of ____ must be vented outside.

A) convection
B) reversion
C) combustion
D) reduction

Question 18

Electric heaters are ____% efficient, but given the cost of electricity and the fact that most of the source energy is coal, they are not a very green solution unless powered by renewable energy.

A) 75
B) 84
C) 93
D) 100

Question 19

When selecting space-conditioning equipment for low-load homes, one-piece heat pumps and air conditioners or ____ mini-splits may be a good option for properly sized, cost effective space conditioning.

A) ductless
B) half-duct
C) one-duct
D) two-duct

Question 20

____ ventilation provides equal parts supply and exhaust air through the use of fans.

A) Exhaust
B) Balanced
C) Supply-only
D) Pressurized

Question 21

The American Society of Heating Refrigeration and Air Conditioning Engineers (ASHRAE) developed a standard for residential ventilation, commonly referred to as ____.

A) 29.1
B) 43.8
C) 51.5
D) 62.2

Question 22

The ASHRAE standard for whole house ventilation in CFM is calculated as ____% of the CFA, plus 7.5 CFM times the number of bedrooms plus 1.

A) 1
B) 5
C) 10
D) 25

Question 23

Bathroom ventilation fans are available in sizes ranging from about ____.

A) 10 CFM to over 75 CFM
B) 25 CFM to over 100 CFM
C) 50 CFM to over 200 CFM
D) 75 CFM to over 300 CFM

Question 24

____ have the potential to allow carbon monoxide and other pollutants to enter the house through gaps in the building envelope.

A) Attached workshops
B) Detached garages
C) Large attached home offices
D) Attached garages

Question 25

Residential air filters that remove particulates from the air include fiberglass, pleated paper, and ____ precipitators.

A) electric
B) hydrolic
C) electrostatic
D) hydrostatic

Question 26

Match each item with a statement below.

-Divide the duct tester fan flow by the area served.

A)HSPF
B)SEER
C)SHF
D)Complete combustion
E)Percentage leak
F)AFUE

Question 27

Match each item with a statement below.

-A heat pump's estimated seasonal heating output in Btus divided by the amount of energy that it consumes in watt-hours.

A)HSPF
B)SEER
C)SHF
D)Complete combustion
E)Percentage leak
F)AFUE

Question 28

Match each item with a statement below.

-Measures fuel fired central furnace and boiler efficiency.

A)HSPF
B)SEER
C)SHF
D)Complete combustion
E)Percentage leak
F)AFUE

Question 29

Match each item with a statement below.

-The process of carbon from fuel bonding with oxygen to form carbon dioxide (CO₂), water vapor, nitrogen, and air.

A)HSPF
B)SEER
C)SHF
D)Complete combustion
E)Percentage leak
F)AFUE

Question 30

Match each item with a statement below.

-The sensible capacity divided by the total capacity (sensible plus latent capacity).

A)HSPF
B)SEER
C)SHF
D)Complete combustion
E)Percentage leak
F)AFUE

Question 31

Match each item with a statement below.

-Describes how efficiently air conditioning equipment works.

A)HSPF
B)SEER
C)SHF
D)Complete combustion
E)Percentage leak
F)AFUE