200-HR HVAC
Where an auxiliary drain pan with a separate drain is installed under the cooling coils where condensate will occur, the minimum depth of the pan shall be ______ .
1 1/2 inches
Where piping other than cast iron or galvanized steel is installed through bored holes of studs within a concealed wall space, steel shield plates are not required where the holes are a minimum of _____ from the nearest edge of the stud.
1 1/2 inches
When serving a domestic kitchen cooking appliance equipped with a down-draft exhaust system, a schedule 40 PVC exhaust duct shall extend a maximum of ______ above grade outside the building.
1 inch
Vent and chimney connectors shall have a minimum slope of _____ rise per foot of run.
1/4 inch
A vibration isolator installed between mechanical equipment and metal ducts can have a maximum length of ____ inches.
10
Electric heating systems are around _____% efficient.
100
How many inches of earth cover shall ferrous gas piping have for protection?
12
A natural gas draft vent serving a wall furnace shall terminate a minimum height of ____ above the bottom of the furnace.
12 feet
Where normal infiltration is not required to provide the necessary combustion air, a minimum of 2 permanent shall be provided with the openings located a max of _____ from the top and bottom of the space.
12 inch
the furnace register of a vented floor surface shall be located a minimum of _____ from doors in any position, draperies, and other similar combustible objects.
12 inches
Unless modified by the manufacturers installation instructions, what is the maximum permitted length of a clothes dryer exhaust duct that has one 90-degree bend and two 45 degree bends?
15 feet
Unless listed for use on combustible floors without floor protection, a floor mounted room heater shall be located so that the noncombustible flooring extends a minimum of ____ inches beyond the appliance on all sides.
18
The access opening through the foundation wall to a vented floor furnace shall be a minimum size of _______.
18 x 24 inches
Solar energy systems shall be equipped with a means to limit maximum water temperature of the system fluid entering or exchanging heat with any pressurized vessel inside the dwelling to a max of _____.
180°F
PEX tubing used for hydroponic piping shall be supported at maximum intervals of _____ when installed in a horizontal position.
2 feet 8 inches
Where the lower 6 inches of a vented floor furnace is sealed to prevent water entry, a minimum ______ clearance shall be provided between the furnace and the ground.
2 inches
A fan should keep blowing after the furnace shuts off for somewhere between _____.
2 to 4 minutes
Where an appliance is installed in an attic, the clear access opening shall be a minimum of _____, but in no case less than necessary to allow removal of the largest appliance.
20 inches by 30 inches
What is the differential for A/C?
20°
Access to air conditioning equipment in the attic shall not be smaller than?
22x30
Where an 8-inch-diameter single wall metal pipe is used as a vent connector, it shall have a minimum galvanized sheet metal gauge of ______ .
24 gauge
Forced air furnaces connected to a duct system shall be equipped with a limit controlled that will prevent the outlet air temperature from exceeding what temperature?
250°F
Factory insulated flexible ducts shall be identified at maximum intervals of ______ with the name of the manufacturer, the thermal resistance R value, the flame spread index and the smoke developed index.
3 feet
Unless the discharge outlet is a minimum of ______ above the outside air inlet, outside air for a forced-air heating system shall be taken a minimum of ______ from an appliance vent outlet, a vent opening from a plumbing drainage system, or the discharge outlet of an exhaust fan.
3 feet, 10 feet
Evaporative coolers shall be installed on a level platform or base located a minimum of ________ above the adjoining ground.
3 inches
In order to permit the free drainage of water, the supports or foundation for the outdoors unit of a heat pump shall be raised a minimum of _____ above the ground.
3 inches
A central furnace located within a closet or similar compartment shall be provided with a minimum of _____ clearance along the sides, back and top of the furnace with the total width of the enclosing space a minimum of _______ wider than the furnace.
3 inches, 12 inches
A minimum of _________ of working space shall be provided in front of the control side of the appliance for servicing.
30 inches
Built in freestanding ranges shall have a minimum vertical clearance of _______ above the cooking top to an unprotected combustible construction.
30 inches
The required lower strapping for a water heater in Seismic Design Categories D1 and D2 shall be located a minimum of ______ inches above the controls.
4
A combustible air opening for a central furnace shall be unobstructed for a minimum distance of _____ in front of the opening.
6 inches
A minimum of _____ working space shall be provided along the front combustion chamber side of a furnace having a firebox open to the atmosphere.
6 inches
Appliances suspended from the floor shall have minimum clearance of _____ from the ground.
6 inches
Where combustion air is taken from the attic, the combustion air opening shall be provided with a metal sleeve that extends from the appliance enclosure to a minimum height of _____ above the top of the ceiling joist insulation.
6 inches
Excavations for appliance installations shall extend a minimum depth of ______ below the appliance with a minimum clearance of ______ on all sides except the control side.
6 inches, 12 inches
What is the minimum required clearance between type L vent piping connector serving a solid fuel appliance and any combustible material?
9 inches
In an air conditioning system, the purpose of the ____ is to remove heat from the refrigerant passing through the copper tubing.
Condenser
A device used for reducing air temperature by the process of evaporating the water into an airstream.
Evaporative cooler
A _________ separates the house from the combustion products.
Heat exchanger
What is the major advantage of an evaporative cooler?
Operating costs are typically one half those of a central air conditioner.
Residential electric furnaces may have up to ____ heating elements.
Six
The high pressure line should feel _____ to the touch.
Slightly warm
In general, combustion air is permitted to be taken from:
Storage areas. Not sleeping rooms, toilet rooms, or bathrooms.
Fuel fire heaters shall not be installed in a ___________.
Storage closet
insulation is wrapped around the:
Suction line
Where combustion air is taken from under floor areas the required free open area to the outside shall be a minimum of _____ the required combustion air opening.
Twice
Access to under floor plenum shall be provided through an opening in the floor with minimum dimensions of ____ and ______. a) 18" and 24" b) 20" and 20" c) 24" and 24" d) 24" and 36"
a) 18" and 24"
For other than direct vent appliances the vent termination for a mechanical draft system shall be mounted a minimum of ____ horizontally from an oil tank or gas meter. a) 3 b) 4 c) 5 d) 10
a) 3 feet
The _____ is the heart of the air conditioning system. a) Compressor b) Evaporator coil c) Condenser coil d) Fan
a) Compressor
In a heating- only climate, an uninsulated heating duct running through a garage will deliver ____ air to the room at the end of the duct. a) Cool b) Cold c) Warm d) Hot
a) Cool
Which one of the following spaces is acceptable as a source for return air for a forced air heating system? a) Sleeping room b) Bathroom c) Kitchen d) Closet
a) Sleeping room
The discharge line should feet ____ to the touch. a) Slightly warm b) Slightly cool c) Extremely hot d) Clammy
a) Slightly warm
Insulation is wrapped around the: a) Suction line b) Liquid line c) Evaporator coil d) Discharge line
a) Suction line
Duct work insulation shall be covered with a vapor retarder when: a) Supply ducts used for cooling pass through non-conditioned spaces conductive to condensation. b) Insulated ducts operate at temperatures in excess of 120°F c) Duct liner insulation is used. d) When insulated heat ducts are installed in a crawl space
a) Supply ducts used for cooling pass through non-conditioned spaces conductive to condensation.
Which of the following is NOT a common problem with condensate collection system on a split-system air conditioner? a) The condensate goes into a 3/4-inch drain line. b) The pan is leaking c) The drain is blocked d) there is no trap
a) The condensate goes into a 3/4-inch line.
A receptacle outlet shall not be required for the servicing of evaporative coolers. a) True b) False
a) True
An air conditioning system relies as much on a good duct system as it does on good cooling equipment. a) True b) False
a) True
Mid and high efficiency furnaces are much harder to inspect than the older conventional furnaces a) True b) False
a) True
Opening the condenser cabinet to get the compressor is beyond the "Texas Standards of Practice". a) True b) False
a) True
Reduced air flow can increase the amount of dirt in the air. a) True b) False
a) True
Outside combustion air opening shall be covered with corrosive resistant or equivalent protection having a minimum opening size of _____ and a maximum opening size of _____. a) 1/8, 1/4 b) 1/4, 1/2 c) 1/2, 3/4 d) 1/2, 1
b) 1/4" to 1/2"
A crack in the heat exchanger is considered "cosmetic". a) True b) False
b) False
A missing fan cover is considered cosmetic. a) True b) False
b) False
If everything works as designed, the combustion products mix directly with the air of the house. a) True b) False
b) False
Our "Texas Standards of Practice" require us to perform a detailed duct system inspection. a) True b) False
b) False
The discharge point from an auxiliary or secondary pan should be out of the way. a) True b) False
b) False
Frost on the evaporator coil indicates? a) The unit is operating normally. b) The unit should be shut down. c) the outside air temperature is below 60°F. d) the outside air temperature is beyond the normally operating range.
b) The unit should be shut down.
An outside condenser unit must be minimum of _____ inches off of the ground. a) 1" b) 2" c) 3" d) 4"
c) 3"
in rooms with supply registers only the doors should be undercut at least _____ of an inch to allow air to reach the return registers. a) 1/2 b) 5/8 c) 3/4 d) 1/3
c) 3/4
During an inspection of the heating system ducts and vents, an inspector is required to determine and report: a) The efficiency, the adequacy, and capacity of the system. b) The uniformity of the supply of conditioned air to the various parts of the residence. c) Damaged ducting or insulation. d) Types of materials contained in the insulation.
c) Damaged ducting or insulation.
What is the difference between an evaporative cooler and an air conditioner? a) Evaporative coolers cool heat by filtering it through water, thus lowering its temperature. Air conditioning works by taking the humidity out of the home. b) Evaporative coolers cool air by filtering it through water, thus lowering its temperature. Air conditioning works by taking the cool air out of the home. c) Evaporative coolers cool air by filtering it through water, thus lowering its temperature. Air conditioning works by taking the humidity out of the home. d) Evaporative coolers cool air by filtering it through air, thus lowering its temperature, air conditioning works by taking the humidity out of the home.
c) Evaporative coolers cool air by filtering it through water thus lowering its temperature. Air conditioning works by taking the humidity out of the home.
Common evaporator coil problems include all of the following except? a) Dirt b) Frost c) Radiant burn d) Corrosion
c) Radiant burn
Starting at the supply plenum, list the components of the duct system the air travels through to deliver heat to the room and to re-enter the furnace at the return site.
c) The heated air is pushed through the supply plenum, along the supply ducts, out the registers into the room. The air travels across the room from supply register to return grille, through the return ducts to the return plenum, where it re-enters the furnace to be reheated.
The liquid line size is ______. a) 5/8" b) 3/4" c) 7/8" d) 3/8"
d) 3/8 inch
What is an evaporative cooler? a) A unit that is the most energy efficient cooling system b) A unit that transfers heat from the inside of the home to the outside. c) A unit that changes the refrigerant from a high pressure, high temperature liquid to a low pressure, low temperature liquid. d) A unit that is a box shaped appliance with one or more porous surfaces that enable air to pass through a fan inside the unit, pulls outside air through the sides and into the house.
d) A unit that is a box shaped appliance with one or more porous surfaces that enable air to pass through a fan inside the unit, pulls outside air through the sides and into the house.
Which of the following is not a product of complete combustion? a) Carbon dioxide (CO2) b) Water vapor c) Nitrogen d) Aldehydes
d) Aldehydes
Evaporative cooling equipment and appliances shall comply with: a) with UL 1995 b) according to the manufacturer's instructions c) on level platforms d) all of the above
d) All of the above.
Ducts that are not properly supported may result in all of the following except? a) tears b) disconnects c) leaks d) frost build-up
d) Frost build-up
Return air for a warm air furnace can only be taken from which area? a) Bathroom b) Hallway c) Kitchens d) Garages
d) Garages
An inspector is required to a) Inspector for the pressure of the air conditioning system refrigerant. b) Determine the presence and location of refrigerant leaks. c) Determine the adequacy and efficiency of the air conditioning system. d) Inspect for proper air conditioning system performance by observing the temperature differential between supply and return air.
d) Inspect for proper air conditioning system performance by observing the temperature differential between supply and return air.
You are inspecting a home with a heat pump installed and suspect that the heat pump is oversized what is the implication of oversized heat pump during the summer months? a) it would heat the house up too fast without dehumidifying the air, resulting in a cool, damp environment. b) it would cool the house down too fast without humidifying the air, resulting in a cool, damp environment. c) It would cool the house down too fast without dehumidifying the air, resulting in a warm, damp environment. d) It would cool the house down too fast without dehumidifying the air, resulting in a cool damp environment.
d) It would cool the house down too fast without dehumidifying the air, resulting in a cool, damp environment.
Accessible shutoff valves installed in fuel supply piping to an appliance must be: a) Outside and within 6 feet of the appliance. b) Outside and within 6 feet of the appliance and ahead of the union connections. c) Outside and within 6 feet of the appliance and in the same room as the appliance. d) Outside and within 6 feet of the appliance ahead of the union connections and in the same room as the appliance.
d) Outside and within 6 feet of the appliance ahead of the union connections and in the same room as the appliance.
Accessible shutoff valves installed in fuel supply piping to an appliances must be: a) Outside and within 6 feet of the appliance. b) Outside and within 6 feet of the appliance and ahead of the union connections. c) Outside and within 6 feet of the appliance and in the same room as the appliance. d) Outside and within 6 feet of the appliance, ahead of the union connections and in the same room as the appliance.
d) Outside and within 6 feet of the appliance, ahead of the union connections and in the same room as the appliance.
When the space between studs in walls or partitions is used as a duct for circulating air, the portions of such space used shall be cut off from all remaining un-used portions of the stud space by: a) Any type of air-tight material. b) Tapes, mastic, or gasketing. c) Only non-combustible materials d) Tight-fitting sheet metal or 1 1/2 inch thick wood stops.
d) Tight-fitting sheet metal or 1 1/2 inch thick wood stops.
Which of the following is NOT a common problem with an air conditioner compressor? a) Out of level b) Excess noise or vibration c) Short cycling or running continuously. d) Over-cooling the refrigerant in the condenser.
d) over-cooling the refrigerant in the condenser.
Common problems with duct systems for air conditioners include all of the following EXCEPT: a) too few supply or return registers. b) poor location for supply and registers c) obstructed registers d) oversized ducts
d) oversized ducts
After removing the homeowner access panel, you can usually see all the following except? a) the wiring to the elements b) the sequencers c) relays d) the elements
d) the elements
Common air conditioner thermostat problems include all the following EXCEPT: a) poor location b) not level c) loose d) wrong size
d) wrong size
