228)
228)
The most common problems encountered with basements are related to:
A)
The high temperatures normally encountered in basements.
B)
The unusually dry conditions normally encountered in basements.
C)
The difference in barometric pressure between the basement and the upper floors.
D)
Excessive moisture in the basement.
Answer:
D
Explanation:
A)
B)
C)
D)
229)
229)
The purpose of a fire damper is to:
A)
Regulate the amount of combustion air to a fuel–burning appliance.
B)
Provide a path for the smoke to exit the building in the event of a fire.
C)
Regulate the draft in a fuel burning appliance.
D)
Prevent the spread of smoke and fire throughout the building.
Answer:
D
Explanation:
A)
B)
C)
D)
230)
230)
A raised metal frame that is sealed to the roof along the outside where rooftop air conditioners
rest is called a:
A)
Plenum.
B)
Curb.
C)
Pad.
D)
Platform.
Answer:
B
Explanation:
A)
B)
C)
D)
231)
231)
How deep a cut can be made in solid wood floor joists to accommodate ductwork?
A)
Up to half the depth of the joist may be cut out from the bottom of the joist.
B)
No cuts can be made in solid wood floor joists for ducts.
C)
The joist can be completely severed so long as successive joists are not cut.
D)
Up to half the depth of the joist may be cut out from the top of the joist.
Answer:
B
Explanation:
A)
B)
C)
D)
61
232)
232)
The space above the drop–in ceiling in a commercial building is often used:
A)
To help clean the air by allowing airborne particles to settle in the ceiling.
B)
As an open wire trough for the building’s wiring.
C)
As a supply air distribution system.
D)
As a return air plenum.
Answer:
D
Explanation:
A)
B)
C)
D)
233)
233)
Registers and grilles are typically installed:
A)
After the house is completely dried in.
B)
After most of the interior finish work is completed.
C)
After the house is framed.
D)
After all the interior walls have sheetrock.
Answer:
B
Explanation:
A)
B)
C)
D)
234)
234)
The interior walls in most residences are made of:
A)
Wood paneling.
B)
Plywood.
C)
Plaster.
D)
Sheetrock.
Answer:
D
Explanation:
A)
B)
C)
D)
235)
235)
Where should the vapor barrier be placed when insulating walls in a cold climate?
A)
Toward the outer wall
B)
Toward the inside of insulated wall
C)
About halfway between the inner and outer walls
D)
Outer walls should not use a vapor barrier.
Answer:
B
Explanation:
A)
B)
C)
D)
62
236)
236)
An example of a sustainable design for water control would be:
A)
Using natural vegetation on the roof to absorb water and reduce water run–off.
B)
Using a large retention pond to sequester the water that runs off of the parking lot.
C)
Using 25 ft hoses instead of 50 ft hoses for periodically washing down the parking lot.
D)
Oversized storm sewers to reduce the possibility of flooding.
Answer:
A
Explanation:
A)
B)
C)
D)
237)
237)
Energy codes and standards set minimum requirements for energy–efficient design and
construction for ________ buildings that impact energy use and emissions for the life of the
building.
A)
old
B)
new and renovated
C)
new
D)
renovated
Answer:
B
Explanation:
A)
B)
C)
D)
238)
238)
When applied to buildings, the term sustainability means that the building must be designed and
built in ways that:
A)
Allow all parts of the building can be accessed for maintenance.
B)
Can continue for at least 10 years before it needs maintenance.
C)
Can continue indefinitely into the future without damaging or depleting natural resources.
D)
Use no natural resources.
Answer:
C
Explanation:
A)
B)
C)
D)
239)
239)
________ is a term often used when describing green technology and innovative building design.
A)
Efficacy
B)
Sustainability
C)
Quality Assurance
D)
Flexibility
Answer:
B
Explanation:
A)
B)
C)
D)
63
240)
240)
An example of designing for a sustainable, healthy interior environment would be:
A)
Using finish materials that have high levels of volatile organic compounds.
B)
Using finishes that have very low volatile organic compounds.
C)
Using more synthetic and plastic materials.
D)
Painting and staining all surfaces to seal them.
Answer:
B
Explanation:
A)
B)
C)
D)
241)
241)
The International Green Construction Code (IGCC) is unique in its approach because it is:
A)
A collaboration of five separate agencies with different areas of expertise.
B)
The only Green construction code.
C)
Available free of charge on the Department of Energy website.
D)
Required by most banks to obtain a construction loan.
Answer:
A
Explanation:
A)
B)
C)
D)
242)
242)
What are the areas of performance in which buildings can earn LEED points?
A)
Design, water, energy, materials, and maintenance
B)
Design, construction, maintenance, and operation
C)
Planning, construction, and operation
D)
Site, water, energy, materials, and indoor environment
Answer:
D
Explanation:
A)
B)
C)
D)
243)
243)
The permanent suction line on a reversing valve is always located:
A)
On the left on the side with three large lines.
B)
In the middle on the side with three large lines.
C)
By itself opposite the side with three large lines.
D)
On the right on the side with three large lines.
Answer:
B
Explanation:
A)
B)
C)
D)
64
244)
244)
Most heat pumps have two metering devices because:
A)
Two metering devices allow for extra refrigerant flow at low outdoor temperatures.
B)
Each coil must function as the evaporator during one of the cycles.
C)
One metering device serves as a backup to the primary metering device.
D)
Two metering devices allow two stage operation.
Answer:
B
Explanation:
A)
B)
C)
D)
245)
245)
Why does a heat pump need two metering devices?
A)
One metering device is used for the refrigerant circuit and another for the heat strips.
B)
One metering device is used for the cooling cycle and one for the heating cycle.
C)
One metering device is used for first–stage heat and another for auxiliary heat.
D)
Two metering devices provide increased refrigerant flow at low ambient temperatures in
heat.
Answer:
B
Explanation:
A)
B)
C)
D)
246)
246)
The heat sink for a water–source heat pump is:
A)
The air inside the house.
B)
The air outside the house.
C)
The water in the water loop.
D)
Electric strip heat.
Answer:
A
Explanation:
A)
B)
C)
D)
247)
247)
Which of the following is responsible for shifting the position of the sliding cylinder of the
reversing valve?
A)
Gravity
B)
Refrigerant
C)
Condensation
D)
Pressure
Answer:
D
Explanation:
A)
B)
C)
D)
65
248)
248)
How is heat pump Coefficient of Performance, COP, calculated?
A)
COP is a measure of heating BTU per watt averaged for the entire heating season.
B)
COP is the ratio of heat output divided by heat input measured at one particular condition.
C)
COP is a measure of heating BTU per watt measured at one particular condition.
D)
COP is the ratio of heat output divided by heat input averaged for the entire heating season.
Answer:
B
Explanation:
A)
B)
C)
D)
249)
249)
How is an outdoor thermostat used in a dual–fuel heat pump system?
A)
The outdoor thermostat prevents the heat pump from operating above the balance point.
B)
The outdoor thermostat prevents the heat pump from defrosting above the balance point.
C)
The outdoor thermostat prevents the furnace from operating above the balance point.
D)
The outdoor thermostat prevents the electric strip heat from operating above the balance
point.
Answer:
C
Explanation:
A)
B)
C)
D)
250)
The ENERGY STAR® label is awarded to split–system air–to–air units with EERs of ________ or
greater, SEERs of ________ or greater, and HSPFs of ________ or greater.
250)
A)
EER 10, SEER 13, HSPF 7.7
B)
EER 12.5, SEER 18, HSPF 9.6
C)
EER 16, SEER 22, HSPF 13
D)
EER 11, SEER 14, HSPF 8
Answer:
B
Explanation:
A)
B)
C)
D)
251)
251)
Why do air–source heat pumps usually require auxiliary heat?
A)
The heat that a heat pump “pumps in” must first be provided by an auxiliary heat source
B)
The heat pump compressor will not start in cold weather unless it is first warmed up
C)
Because air–source heat pumps break down a lot
D)
Because the heating capacity of the unit drops as house heating requirements increase
Answer:
D
Explanation:
A)
B)
C)
D)
66
252)
252)
What is a dual–fuel heat pump?
A)
A heat pump that can run on either AC or DC power.
B)
A heat pump whose energy requirements are so massive that two fuel sources are required
to operate it.
C)
An air–source heat pump added to a fossil fuel furnace.
D)
A heat pump that can be field converted from air–source to water–source.
Answer:
C
Explanation:
A)
B)
C)
D)
253)
253)
Where are electric auxiliary heat strips normally located in air–source heat pumps?
A)
In the discharge air of the fan
B)
Next to the indoor coil to keep it warmer when the heat pump capacity drops
C)
In the return air, before the coil
D)
Next to the outdoor coil to keep it warmer in cold weather
Answer:
A
Explanation:
A)
B)
C)
D)
254)
254)
What is the purpose of the required auxiliary drain pan for attic installation of blower coil units?
A)
To provide faster condensate water drainage
B)
To keep water from ruining the ceiling if the primary drain stops up
C)
To offset the negative pressure on the primary drain
D)
To make changing the drain pan easier
Answer:
B
Explanation:
A)
B)
C)
D)
255)
255)
What position are the split–system shutoff valves in when the unit ships?
A)
Frontseat cracked
B)
Frontseated
C)
Backseated
D)
Backseat cracked
Answer:
B
Explanation:
A)
B)
C)
D)
67
256)
256)
What is the total system charge for a system with a factory charge of 56 oz of R–410A, an assumed
length of 15 ft, and a 3/8 in liquid line that is 35 ft long?
A)
56 oz
B)
56 oz + 21 oz = 77 oz
C)
56 oz + 12 oz = 68 oz
D)
(35 – 15) × 0.6 = 12 oz
Answer:
C
Explanation:
A)
B)
C)
D)
257)
257)
Which of the following is a key component of a visual inspection?
A)
Check that the fan switch is on.
B)
Check that all wires have mechanical strain relief.
C)
Check that the power button is on.
D)
Check that the water flow is within manufacturer’s guidelines.
Answer:
B
Explanation:
A)
B)
C)
D)
258)
258)
Which of the following statements pertains to wiring procedures for split systems?
A)
Wires of an indoor blower and outdoor condensing unit share a power circuit.
B)
You connect the two green wires to energize the fan.
C)
You connect wires of the same colors to wire split–system heat pumps.
D)
Split systems require two power circuits and two wire bundles.
Answer:
D
Explanation:
A)
B)
C)
D)
259)
259)
To prevent the spread of smoke and fire, fire dampers are designed to close:
A)
All the time except when the system is operating.
B)
Using the NO contacts of the fire alarm relay.
C)
Manually.
D)
Automatically.
Answer:
D
Explanation:
A)
B)
C)
D)
68
260)
260)
When would a fire damper be used?
A)
Anywhere rooftop air conditioners are installed
B)
Anytime supply or return ducts must pass through a firewall
C)
If a building is deemed “green”
D)
In a partition
Answer:
B
Explanation:
A)
B)
C)
D)
261)
261)
When refrigerant lines are installed under a poured concrete slab, they are protected from
physical harm:
A)
By using a chase or conduit
B)
By the foam insulation around the refrigerant lines
C)
By a covering of tar and pitch
D)
By the concrete itself
Answer:
A
Explanation:
A)
B)
C)
D)
262)
262)
A widely–recognized rating system for sustainable buildings introduced in 2000 is:
A)
LEED.
B)
EPA SmartHome.
C)
US DOE Energy Crafted Homes.
D)
AIA GreenDesign.
Answer:
A
Explanation:
A)
B)
C)
D)
263)
263)
An example of sustainable site selection would be choosing to:
A)
Create a new building site by removing trees and grading.
B)
Build a new site by filling in a useless marshy area with rubble and fill dirt.
C)
Build on an existing building site.
D)
Remove all the trees on a site to allow better access for construction and maintenance.
Answer:
C
Explanation:
A)
B)
C)
D)
69
264)
264)
A building earns a LEED rating by:
A)
Earning points in five different areas.
B)
Paying for a LEED stamp of certification.
C)
Following a detailed, prescriptive methods for design and construction.
D)
Using LEED–approved materials and contractors.
Answer:
A
Explanation:
A)
B)
C)
D)
265)
265)
An example of energy–saving design would be:
A)
Using several smaller incandescent fixtures instead of a few larger fluorescent ones.
B)
Using natural lighting when possible.
C)
Using fewer incadescent light fixtures.
D)
Wiring the lights to 100 V instead of 120 V.
Answer:
B
Explanation:
A)
B)
C)
D)
266)
266)
The outdoor coil is the evaporator in:
A)
Both the cooling and defrost cycles.
B)
The heating cycle.
C)
Both the heating and defrost cycles.
D)
The cooling cycle.
Answer:
B
Explanation:
A)
B)
C)
D)
267)
267)
The heat sink for a heat pump is:
A)
Always air.
B)
The cool medium that the evaporator draws heat out of.
C)
The warm medium that the condenser rejects heat into.
D)
Always water.
Answer:
C
Explanation:
A)
B)
C)
D)
70
268)
268)
How are heat pumps classified?
A)
By their cooling source and cooling sink
B)
By their heat source and heat sink
C)
By their air intake pump
D)
By their refrigerant type
Answer:
B
Explanation:
A)
B)
C)
D)
269)
269)
The indoor coil is the evaporator in:
A)
Both the heating and cooling cycles.
B)
The cooling cycle.
C)
The heating cycle.
D)
Neither the cooling and or heating cycles.
Answer:
B
Explanation:
A)
B)
C)
D)
270)
270)
A common type of defrost control used on air–source heat pumps is:
A)
Demand defrost based on suction pressure.
B)
Time initiated and temperature terminated.
C)
Time initiated and time terminated.
D)
Demand defrost based on compressor current draw.
Answer:
B
Explanation:
A)
B)
C)
D)
271)
271)
What is auxiliary heat?
A)
Another heat source added to make up the difference between the heat pump capacity and
the house load
B)
A heating system that is not really needed
C)
A separate system connected to the same ductwork
D)
A heating system that operates using “green” alternative energy
Answer:
A
Explanation:
A)
B)
C)
D)
71
272)
272)
The crankcase heater protects the compressor on startup by:
A)
Providing an extra heat source, making the compressor’s job easier.
B)
Vaporizing any liquid refrigerant that may enter the compressor during the OFF–cycle.
C)
Keeping the oil warm so that it does not become too thick to lubricate properly.
D)
Drying out any water in the oil.
Answer:
B
Explanation:
A)
B)
C)
D)
273)
273)
When installing the outdoor unit of a split–system air–source heat pump, it is important to locate
the unit:
A)
As close to the house as possible to help shelter the unit from inclement weather.
B)
Above the snow line of the area.
C)
Below the frost line to reduce defrost cycles.
D)
Under an overhang for protection against the weather.
Answer:
B
Explanation:
A)
B)
C)
D)
274)
274)
Which of the following is the purpose of vibration isolation pads?
A)
They maintain airflow around the unit.
B)
They keep the unit in place.
C)
They reduce sound.
D)
They absorb shock.
Answer:
C
Explanation:
A)
B)
C)
D)
275)
275)
Which of the following is a practical use of a solar system?
A)
Use a solar system in lieu of a heat pump for heating during winter.
B)
Use a solar system to operate a heat pump during winter.
C)
Use a solar collector to control the flow of water entering the heat pump.
D)
Use a solar collector to raise the temperature of water entering the heat pump.
Answer:
D
Explanation:
A)
B)
C)
D)
72
276)
276)
The outdoor coil is the condenser in:
A)
Neither the heating or cooling cycles.
B)
The cooling cycle.
C)
Both the cooling and heating cycles.
D)
The heating cycle.
Answer:
B
Explanation:
A)
B)
C)
D)
277)
277)
What is the purpose of a suction line accumulator in heat pump systems?
A)
To protect the compressor by separating oil out of the returning refrigerant
B)
To accumulate debris and prevent it from entering the compressor
C)
To catch any liquid refrigerant that has not evaporated before it reaches the compressor
D)
To provide a safe way for technicians to charge liquid into the system
Answer:
C
Explanation:
A)
B)
C)
D)
278)
278)
Why is a heat pump called a heat pump?
A)
The conversion of electricity into heat has the effect of pumping heat into the heated space.
B)
Heat pumps must be pumped up with refrigerant pressure before they can operate.
C)
It moves heat from a low temperature heat source to a higher temperature heat sink.
D)
All heat pumps use a pump that is constructed like a centrifugal water pump, but is used to
pump heat molecules instead.
Answer:
C
Explanation:
A)
B)
C)
D)
279)
279)
An air–to–water heat pump is typically used for:
A)
Industrial process heating.
B)
House heating.
C)
Both house and domestic hot water heating.
D)
Domestic hot water heating.
Answer:
C
Explanation:
A)
B)
C)
D)
73
280)
280)
During the defrost cycle:
A)
The outdoor fan shuts off to slow frost accumulation.
B)
The entire system shuts off to allow it to defrost.
C)
The outdoor coil becomes the condenser and the outdoor fan shuts off.
D)
The outdoor heat strips are energized.
Answer:
C
Explanation:
A)
B)
C)
D)
281)
281)
How do newly installed loops become clogged?
A)
The pressure is set incorrectly.
B)
Air in the loop corrodes the connections.
C)
Pipe shavings restrict the water flow.
D)
The water temperature is outside the allowable range.
Answer:
C
Explanation:
A)
B)
C)
D)
282)
282)
After installing the lines and coil on a split–system heat pump, what steps must be taken before
opening the unit installation valves?
A)
Charge the lines and coil with refrigerant and perform a leak test.
B)
The system components come pre–evacuated, so the valves may be opened immediately
after installing the lines and coils.
C)
Perform a leak test on the lines and coil and evacuate them.
D)
Charge the lines and coil with refrigerant.
Answer:
C
Explanation:
A)
B)
C)
D)
74
283)
283)
How does a liquid–line filter drier designed for heat pump use differ from a standard liquid–line
filter drier?
A)
Heat pump filter driers can withstand higher pressures.
B)
Heat pump filter driers are manufactured from stainless steel.
C)
Heat pump filter driers are bidirectional.
D)
Heat pump filter driers have two inlets and two outlets to accommodate reverse refrigerant
flow.
Answer:
C
Explanation:
A)
B)
C)
D)
284)
284)
Why are thermostatic expansion valves often used as the outdoor metering device for the heating
cycle?
A)
TEVs are easier to install on the outdoor coil.
B)
TEVs allow the system pressures to equalize in the off cycle, allowing the use of low starting
torque compressors.
C)
The TEV can modulate the refrigerant flow over the wide range of temperatures
experienced in the heating mode.
D)
TEVs can be adjusted in the field to match the heat pump’s performance with the climate it
will be operating in.
Answer:
C
Explanation:
A)
B)
C)
D)
285)
285)
What type of duct system is commonly used with mini–split heat pumps?
A)
Extended plenum
B)
No duct work
C)
Radial system
D)
Perimeter loop system
Answer:
B
Explanation:
A)
B)
C)
D)
75