How to inspect HVAC system

A home inspector is required to describe the heating ____________. A) method B) options C) cost

Method

A _________ comes in both invasive and non-invasive models. A) flashlight B) infrared camera C) moisture meter

Moisture meter

A natural-draft unit relies on ________. A) hydronic output B) an intake fan C) natural draft

Natural draft

A home that has a fuel-fired heating system requires _________________. A) special permits B) venting of its combustion gases and byproducts to the outside C) seasonal inspection

venting of its combustion gases and byproducts to the outside

The use of air conditioning or simple cooling of the air became widespread after ____________. A) 1980 B) 1945 C) 1966

1945

A conventional low-efficiency, natural-draft gas-fired furnace requires about ____ cubic feet of air (combustion & dilution) for every cubic foot of gas burned. A) 10 B) 100 C) 30 D) 50

30

___________ can be used to check for wood rot and damage caused by a leak from a condensing unit. A) A screwdriver, awl or probe B) A moisture meter C) An infrared camera

A screwdriver, awl or probe

If the heating system is a high-efficiency, gas-fired furnace, then the heat-conveying medium is _____. A) air B) water C) electricity

Air

Ducts can be made out of a variety of materials, including _____________. A) aluminum B) galvanized sheet metal C) All answers are correct. D) paper fiber

All answers are correct

The following are types of fuel used in residential heating: ______________. A) All answers are correct. B) natural gas C) kerosene D) pellets

All answers are correct

A flashlight is a useful tool for the HVAC portion of a home inspection because the inspection of the internal components of the system may require illumination for some instances, including looking at _______________. A) any of these B) the interior of the combustion chamber through a viewing portal C) the ribbon burners inside the combustion chamber D) the air-filtering system that is installed inside the ductwork

Any of these

The HVAC system may be located in the _______________. A) attic B) basement C) crawlspace D) any of these

Any of these

A ______ is approximately the amount of energy needed to heat 1 pound of water by 1 degree Fahrenheit. A) BTU B) steady-state C) gas-foot-pound

BTU

The lack of dilution air may cause a condition of ___________ at the furnace. A) updraft B) downdraft C) backdraft

Backdraft

Gas furnaces need draft air _____________ to maintain a draft of the combustion gases. A) Both answers are correct. B) dilution air C) draft air

Both answers are correct

If combustion air is inadequately supplied to a gas furnace, _____________ will be produced. A) carbon monoxide B) inadequate heat C) carbon dioxide

Carbon monoxide

Warm-air furnaces are typically referred to as ______________. A) distributed heating units B) central heating systems C) gravity heating systems

Central heating system

High-efficiency condensing HVAC systems produce excessive _______________. A) condensate B) heat C) noise D) cooling

Condensate

Heat transferred through a solid happens via __________. A) radiation B) convection C) conduction

Conduction

Forced-air furnaces function primarily by ________. A) convection B) radiation C) conduction

Convection

Heat transferred within a gas or liquid happens via __________. A) radiation B) convection C) conduction

Convection

A home inspector is required to ______________ the energy source. A) shut-off B) repair C) describe

Describe

The _______________ is the temperature below which the water vapor contained in the flue gas will turn into condensation. A) dew point temperature B) vapor temperature C) combustion temperature

Dew point temperature

__________ are typically formed in concentric cones or pyramids. A) Vent pipes B) Diffusers C) Plenums

Diffusers

Many inspectors start their home inspection by inspecting the ___________ first. A) interior B) HVAC system C) exterior

Exterior

If a fan is used to distribute the air from a warm-air heating system, it's more properly known as a _____________. A) forced warm-air heating system B) a gas-fired warm-air heating system C) gravity warm-air heating system

Forced warm-air heating system

There are ___________ types of heat-conveying mediums. A) many different B) six C) four

Four

One distinguishing characteristic of a heating system that an inspector should report is its ___________. A) fuel type B) service life expectancy C) AFUE rating

Fuel type

The __________ is a device that measures the volume of gas entering a building. A) combustion chamber B) gas line C) gas meter

Gas meter

A ____________ is needed in order to safely perform maintenance and servicing of the heating system. A) drip leg B) gas meter C) gas shut-off valve

Gas shut-off valve

Burning natural gas with oxygen yields carbon dioxide, water vapor, and ________. A) heat B) refrigerant C) cooling

Heat

Heat is transferred _____________. A) via reflection B) in convex wave patterns C) in direct rays

In direct rays

Steam _____ considered a heat-conveying medium. A) is B) is not

Is

Water __________ considered a heat-conveying medium. A) cannot be B) is not C) is

Is

Condensate lines or sweating suction lines can ______ onto building materials. A) leak B) explode C) freeze

Leak

A warm-air heating system costs ________ to install than a hot-water or steam-heating system. A) more B) about the same C) less

Less

Natural gas is _________ air. A) lighter than B) the same weight as C) heavier than

Lighter than

A(n) ____________ can be used to tell the difference between aluminum pipes and steel pipes. A) moisture meter B) infrared camera C) magnet

Magnet

In a conventional gas furnace with a natural draft, the _____ air is mixed with the gas initially for combustion at the burners. A) primary B) secondary C) ambient D) thirdly

Primary

Heat can move from one body to another by _________. A) capacitation B) ionization C) radiation

Radiation

Heat transferred through electromagnetic waves happens via __________. A) radiation B) convection C) conduction

Radiation

The efficiency of the air circulation in a house with a gravity warm-air heating system depends on the temperature difference between the warm air ________ and the cool air ________. A) rising... falling B) rising... rising C) falling... rising D) falling... falling

Rising... falling

The warm air in a gravity warm-air heating system rises up through warm-air ducts or pipes that are also known as __________. A) plenums B) ducts C) stacks

Stack

The older gas furnaces have a(n) ______ pilot light that is always burning. A) standing B) intermittent C) direct-spark

Standing

_____________ is what carries the heat from the source to the enclosure being heated. A) Conduction B) Radiation C) The heat-conveying medium

The heat-conveying medium

The heat from a warm-air heating system is distributed throughout the home either by gravity or ____________. A) thermal dynamics B) solar heat exchange C) the use of a circulating/blower fan D) the use of supply/return registers

The use of circulating/blower fan

_______________ is an effective means of inspecting for water leaks and moisture problems. A) Thermography B) Well inspection C) Lead testing

Thermography

T/F: According to the InterNACHI Home Inspection Standards of Practice, a home inspector is required to describe the energy source of the heating system in the report.

True

An inspector should describe the energy source or ___________ in the inspection report. A) the cost of operation B) the type of heating fuel C) the expected service life

Type of heating fuel

Servants and slaves fanning royalty using large palm fronds and feathers is an early example of ______________. A) air conditioning B) ventilation C) heating

Ventilation

A home inspection is a non-invasive, _____________ examination of a residential property. A) visual B) olfactory C) tactile

Visual

Heat moves from the ________ body, and the ________ body absorbs it. A) lower, higher B) higher, lower C) colder, warmer D) warmer, colder

Warmer, colder

___________ is the greatest destroyer of houses. A) Heat B) Water C) Wind

Water

____________ is one of the main concerns when inspecting the HVAC system. A) Dust B) Overheating C) Water (or moisture)

Water (or moisture)

The first step in the operation of a warm-air heating system is ______________. A) the warm conditioned air begins to circulate and rise B) circulating fan draws air into the furnace C) the furnace heats the house's air

circulating fan draws air into the furnace

Heating, ventilation and air conditioning are each used in an attempt to __________________. A) eliminate airborne allergens B) decrease dependence on fossil fuels C) control the environment within an enclosure

control the environment within an enclosure

You may be able to describe a heating system by its _____________. A) brand name B) heat-conveying medium C) age

heat-conveying medium

The air movement from a warm-air heating system may cause __________. A) mold spores to settle on damp surfaces B) radon to be distributed throughout the living area C) indoor air-quality issues caused by agitated dust and other particles

indoor air-quality issues caused by agitated dust and other particles

Electricity may be considered a fuel, but it can also be _____________. A) the heat-conveying medium B) recycled C) the most expensive way to heat a home

the heat-conveying medium