HVAC

___________ is the greatest destroyer of houses. Heat Water Wind

Water

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

ventilation

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

venting of its combustion gases and byproducts to the outside

Heat moves from the ________ body, and the ________ body absorbs it. lower, higher warmer, colder colder, warmer higher, lower

warmer, colder

Air has a specific gravity of ______. 0 10 1

1

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

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. 50 100 30 10

30

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

All answers are correct

Air-conditioning systems do not simply cool the air, but they actually condition it by controlling the air's ______________. moisture content All answers are correct. movement temperature

All answers are correct.

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

All answers are correct.

__________ are typically formed in concentric cones or pyramids. Vent pipes Plenums Diffusers

Diffusers

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

Heat

"________" describes a type of heating system. Psychrometric Hydroponic Hydronic

Hydronic

Condensate lines or sweating suction lines can ______ onto building materials. leak freeze explode

Leak

If you are inspecting a _______ duct system, you should find a large rectangular duct that comes directly out of the heating system and runs in a straight line down the center of the basement, attic or ceiling. plenum loop perimeter

Plenum

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

The heat-conveying medium

_______________ is an effective means of inspecting for water leaks and moisture problems. Thermography Well inspection 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. False True

True

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

Visual

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

Water (or moisture)

To ignite natural gas, you need a mixture of gas and ______. air flame water

air

Changes in the direction of ducts are made by _____________. register boots elbows angle ducts

angle ducts

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 _______________. the ribbon burners inside the combustion chamber the interior of the combustion chamber through a viewing portal any of these the air-filtering system that is installed inside the ductwork

any of these

The HVAC system may be located in the _______________. any of these crawlspace basement attic

any of these

Radiation is the transfer of heat energy _________________. by electromagnetic wave motion in direct rays by convection

by electromagnetic wave motion

Air conditioning ____________ a warm-air heating system. cannot be integrated with can easily be integrated with

can easily be integrated with

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

carbon monoxide

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

central heating systems

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

circulating fan draws air into the furnace

High-efficiency condensing HVAC systems produce excessive _______________. heat condensate noise cooling

condensate

Heat transferred through a solid happens via __________. radiation conduction convection

conduction

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

control the environment within an enclosure

Heat transferred within a gas or liquid happens via __________. conduction radiation convection

convection

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

describe

The ___________ of the heating system can be cited to distinguish one heating system from another. efficiency and capacity brand and age location and condition

efficiency and capacity

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

exterior

There are two broad categories to describe furnace heating systems: gravity warm-air furnaces; and ______ warm-air furnaces. natural convective forced

forced

There are basically __________ types of heating systems. four six many different

four

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

fuel type

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

gas meter

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

gas shut-off valve

One early example of air conditioning includes _______________. the use of swamp coolers hanging wet towels across an open window driving basement air into the living space above

hanging wet towels across an open window

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

heat-conveying medium

The gas piping installed after the meter is usually the responsibility of the ____________. homeowner furnace manufacturer utility company

homeowner

According to the InterNACHI SOP, a home inspector shall identify and describe, ____________, the inspected systems and components of the dwelling. directly to the client verbally in written format

in written format

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

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

Steam _____ considered a heat-conveying medium. is not is

is

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

less

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

magnet

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

method

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

moisture meter

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

natural draft

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

primary

In a forced warm-air heating system, the cool air _____________. falls to the floor of the home and dissipates returns through the ducts and back to the furnace, where it is re-heated rises and mixes with the warm air

returns through the ducts and back to the furnace, where it is re-heated

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 ________. falling... rising falling... falling rising... rising rising... falling

rising... falling

Round or square supply ducts that are connected to and branch off the extended duct are called _________. side-out takeoffs side takeoffs offside takeups

side takeoffs

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

stacks

Ventilation became important during _____________ to protect workers' safety and increase their productivity. World War II the 1980s the Industrial Revolution

the Industrial Revolution

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

the heat-conveying medium

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

the use of a circulating/blower fan