Module 2 Missed Test Questions (2) Flashcards
When inspecting air conditioning, you are required to inform the client:
a. age of unit
b. capacity of unit
c. circuit breaker amperage exceeds the listed maximum amperage for the unit
circuit breaker amperage exceeds the listed maximum amperage for the unit
When measuring the supply temp in a convectional A/C unit, if the range is less than _ or greater than _, there is probably something wrong
a. 15 degrees & greater than 25 degrees
b. 12 degrees & greater than 22 degrees
c. 10 degrees & greater than 15 degrees
15 degrees & greater than 25 degrees
How many evaporator/air handlers can a ductless split system’s exterior condenser unit serve?
a. 2-3
b. 4-5
c. Not more than 3
4-5
Which of the following is true of high velocity A/C systems?
a. Hi-V systems are more flexible systems than systems with conventional large ductwork
b. Hi-V systems provide less efficient moisture removal than conventional systems
c. Hi-V systems are more difficult to install than systems with conventional ductwork.
Hi-V systems are more flexible systems than systems with conventional large ductwork
What is the last thing you should do when inspecting an air source heat pump?
a. the condensate drain
b. make sure it sounds ok when it is operating
c. the condition of the interior air handler and line set
make sure it sounds ok when it is operating
While a heat pump can be operated at any temperature in cooling mode, what degree is the benchmark when testing?
a. 50 degrees
b. 60 degrees
c. 70 degrees
60 degrees
At what temperature is the compressor no longer able to create sufficient heat (balance point)?
a. 30 degrees
b. 35 degrees
c. 32 degrees
30 degrees
Geothermal installation cost are _ the cost of conventional HVAC, but the additional cost is returned in _ years.
a. 1-2 times, 5-15 years
b. 2-3 times, 5-10 years
c. 3-4 times, 5-15 years
3-4 times, 5-15 years
What temperature can a heat pump be operated in cooling mode?
a. a heat pump can be operated in cooling mode at any temperature
b. 50 degrees
c. 60 degrees
a heat pump can be operated in cooling mode at any temperature
Evaporative coolers operate by evaporating water and moving air to reduce indoor temperatures in dry climates up to _ degrees.
a. 20
b. 30
c. 35
30
Using Ohm’s law, which of the following scenario is NOT an acceptable circuit load for a single outlet that is 15-amp, 120-volt circuit?
a. a client cannot run a coffeemaker (900 watts) and a microwave (1200 watts) on same outlet
b. a client can run a coffeemaker (900 watts) and a microwave (1200 watts) on the same outlet
c. a client can run an electric oven (1000 watts) and a microwave (800 watts) on same outlet
a client can run a coffeemaker (900 watts) and a microwave (1200 watts) on the same outlet
Which of the following is/are the proper wire gauge on branch circuits
a. 14 AWG on 15-amp breaker fuse
b. 12 AWG on 20-amp breaker fuse
c. 10 AWG on 30-amp breaker fuse
d. 8 AWG on 40-amp breaker fuse
e. all of the above
all of the above
Ground fault circuit interrupter (GFCI) save lives because they limit the duration of an electrical shock to about
a. 1/10th of a second
b. 1/40th of a second
c. 1/50th of a second
1/40th of a second
Which of the service entrance cables GEC (main ground wire) size & amperage is/are accurate?
a. 125 amps or less/min 8 g copper (#6 al)
b. 150 amps or less/min 8 g copper (#6 al)
c. 200 amps/min 2 g copper (#4 al)
125 amps or less/min 8 g copper (#6 al)
Which of the following is NOT accurate about armor & metal clad cable?
a. armored cable, type AC is commonly known as BX and used since the early 1900s
b. Type BX has been used since the late 1950s
c. Metal clad cable, type MC is very common in residential
Metal clad cable, type MC is very common in residential
Which type of silicon-based cells used in photovoltaics has the most longevity?
a. monocrystalline
b. silicon-based cells used in photovoltaics have around the same longevity
c. thin film
silicon-based cells used in photovoltaics have around the same longevity
Based on the National Fire Protection Association (NFPA), using what they tell us is unconfined space, calculate the required minimum square footage for a 100,000 BTU furnace with a 34,000 BTU water heater right next to it.
a. 838 sqft
b. 738 sqft
c. 638 sqft
838 sqft
The sight glass or gauge glass normal water starting level is about 1/2 to 2/3 full, while the normal operating level is about _
a. 1/2 to 2/3 full
b. 1/3 full or less
c. 1/3 full or more
1/3 full or less
Wood stoves should sit on a non-combustible hearth, which extends at least _ inches out from the front of the stove and _ at the sides and rear
a. 12 inches, 10 inches
b. 14 inches, 8 inches
c. 18 inches, 8 inches
18 inches, 8 inches
Which of the following plumbing supply piping is only for cold water service & distribution?
a. Polyvinyl Chloride (PVC)
b. CPVC
c. PB
Polyvinyl Chloride (PVC)
Horizontal metal pipe for copper is 1 in diameter or less should be supported every _. If it is 1 1/4” in diameter, it should be supported every _.
a. 4ft, 6ft
b. 8ft, 10ft
c. 10ft, 12ft
8ft, 10 ft
Which type of gas piping must be labeled with size and usage?
a. corrugated stainless steel (CSST)
b. polybutylene (PB)
c. copper
corrugated stainless steel (CSST)
Crawl space ventilation requires ventilation openings to be within _ of each corner of the building
a. 1ft
b. 3ft
c. 5ft
3ft
If a crawl space has exhaust-powered ventilation, the continuous mechanical exhaust ventilation should operate at a rate equal to 1 cubic foot per minute for each __ or crawl space floor area, including an air pathway to the common area, such as a duct to transfer grille & perimeter walls insulated
a. 25 sqft
b. 50 sqft
c. 75 sqft
50 sqft
If there is a plenum in the crawlspace, access to an underfloor plenum shall be provided through an opening in the floor w/minimum dimensions of _
a. 14 in by 20 in
b. 18 in by 24 in
c. 20 in by 24 in
18 in by 24 in
Attic vent ventilation opening should have at least dimensions of a 1/16 in minimum & _ maximum opening.
a. 1/8”
b. 1/2”
c. 1/4”
1/4”
Which type of insulation is very resistant to fire and can typically take over 500 degrees before combusting
a. fiberglass
b. rockwool batts
c. asbestos
rockwool batts
Extruded polystyrene, a type f rigid board insulation, has an R-value of about _ per inch
a. 4
b. 5
c. 6
5
How many BTUs is equivalent to 1 ton of cooling?
a. 6000 BTUs
b. 10,000 BTUs
c. 12,000 BTUs
10,000 BTUs
When using combustion in HVAC systems, it is important to be aware that for every 20,000 BTUs of combustion, __ of liquid water is created.
a. 1 cup
b. 2 pints
c. 1 quart
1 quart
Dryer vents must be a minimum size of __in diameter.
a. 4”
b. 6”
c. 8”
4”
ASHRA recommends intermittent or continuous ventilation rates for bathrooms to be __ to __ cubic feet per minute (CFM), and __ to __ CFM for kitchens.
a. 10 to 30, 100 to 50
b. 50 to 20, 100 to 25
c. 40 to 10, 90 to 35
50 to 20, 100 to 25
Which type of ventilation system is most applicable in hot or mixed climates?
a. closed ventilation system
b. supply ventilation system
c. balanced ventilation system
supply ventilation system
___ improves the effectiveness of ventilation systems by removing pollutants at their source as they are generated.
a. spot ventilation
b. natural ventilation
c. unrestricted ventilation
spot ventilation
AN underwater luminaire must be designed to assure freedom from electrical shock without a GFCI device in its circuit. Any light fixture operating at more than __ must have GFCI protection.
a. 15 volts
b. 20 volts
c. 80 volts
15 volts
The working definition of a swimming pool considered a permanent structure in the ground, or partially in the ground, that is capable of holding water with a depth greater than 42” outside abuilding, & pools installed inside a building, __.
a. all depths
b. 30 inches
c. 42 inches
all depths
Which type of PVC pipes are the best choice for pool or spa’s circulation systems?
a. schedule 70 PVC
b. schedule 50 PVC
c. schedule 40 PVC
schedule 40 PVC
Luminaires and paddle fans can be installed at least __ above the water level without GFCI protection
a. 8ft
b.10 ft
c. 12 ft
12 ft
For the formula used to establish a water budget for irrigation systems, MAWA=
ETo X AF X LA X 0.62, the adjustment factor varies, but is commonly __ or __.
a. 0.5, 1.0
b. 0.8, 1.0
c. 0.9, 1.0
0.8, 1.0
FOr irrigation control systems, pressure regulators are often needed to reduce water supply line pressure for proper irrigation system operation. Sprinkler systems run at pressures ranging from __ to __ PSI depending on the type of system used.
a. 15 to 75 PSI
b. 20 to 80 PSI
c. 25 to 85 PSI
25 to 85 PSI
Which of the following is NOT a method used to evaluate when to irrigate?
a. runoff capture method
b. flexible method
c. calendar method
runoff capture method
Which is the correct formula for determining the system flow rate & area irrigated?
a. PR(IN/HR) = GPM x 63.3 divided by landscape area in sqft
b. PR(IN/HR) = GPM x 93.6 divided by landscape area in sqft
c. PR(IN/HR) = GPM x 96.3 divided by landscape area in sqft
PR(IN/HR) = GPM x 96.3 divided by landscape area in sqft
When running a catch can test, for low precipitation rates less than 0.4 in per hour, the test run time may take as long as __.
a. 50 min
b. 90 min
c. 2 hours
90 min
Which type of wells can often cost over $10,000 and may go down as far as 1,000 feet without the guarantee of getting water?
a. water table
b. confined aquifer
c. unrestricted aquifer
confined aquifer
Which type of pump is commonly used for shallow wells (25ft or less)
a. jet pumps
b. submersive pumps
c. piston pumps
jet pumps
Pump systems relief valves protect against pressure build up. These are typically set at relief pressure of __.
a. 75 PSI
b. 100 PSI
c. 125 PSI
100 PSI
Along with local & state oversight agencies & mortgage lenders who have minimum requirements for water flow & yield testing, the Department of Housing and Urban Development (HUD) requires at least __ gallons per minute.
a. 1-2 GPM
b. 2-3 GPM
c. 3-5 GPM
3-5 GPM
Which type of drain field system material is cheap and should be utilized on most systems where soil can encroach & enter the system?
a. gravel
b. filter cloth
c. dry well
filter cloth
For top cover for drain fields, a minimum depth of __ of topsoil is preferred & often required above any of he drain lines
a. 6”
b. 8”
c. 10”
6”
When inspecting a septic system using a dye & flow test, flowing it for __ would provide the minimum flow for this test if one faucet flows at approximately 2.5 gallons per minute.
a. 20 minutes
b. 45 minutes
c. 60 minutes
60 minutes
If the sludge in a septic tank is determined to be more than __ of the tank, a pump out should be recommended.
a. 1/4 from bottom
b. 1/3 from the bottom
c. 1/2 from top
1/3 from bottom
A/An __ is the unit of measurement for electrical resistance.
a. colt
b. AMP
c. OHM
OHM
If the current in Amps is doubled, this __ the amount of heat generated
a. does not impact
b. doubles
c. quadruples
quadruples
Federal Pacific Stab-Lok and __ are older service panels that have been identified as causing a fire risk
a. Zinsco
b. GE
c. Leviton
Zinsco
Per the National Electric Code, when is a light required in a walk-in closet?
a. if the closet size is over 10 sqft
b. if the closet is over 15 sqft
c. a light is not required in a walk-in closet
a light is not required in a walk-in closet
Which of the following is not true regarding reporting electrical defects?
a. major defects should be reported
b. minor defects should be reported
c. it is important to say licensed even if you know for sure an electrician is licensed in you area
it is important to say licensed even if you know for sure an electrician is licensed in you area
Which type of furnace is common in homes that are on slabs or have crawl spaces?
a. down-flow unit
b. up-flow unit
c. side-flow unit
down-flow unit
Most furnaces built today require what kind of clearance for the cabinet and the wall?
a. zero inches
b. three inches
c. five inches
zero inches
How wide should the solid walkway be from the attic access to the unit?
a. 1 foot
b. 2 feet
c. 3 feet
2 feet
A natural gas and propane single wall vent requires a minimum of __ of clearance
a. 3”
b. 4”
c. 6”
6”
For gas furnaces, with a single wall vent a minimum of __ of clearance from anything combustible.
a. 3”
b. 5”
c. 6”
6”
Which of the following is NOT considered a common duct defect?
a. excessively dirty ducts
b. excessively leaky joints
c. sagging
excessively dirty ducts
Which type of boiler system has a compression tank without a vent or overflow pipe?
a. closed system convection
b. closed system gravity type
c. open system wet boiler
closed system gravity type
Which of the following should be included in a boiler inspection?
a. vent and exterior boiler jacket
b. gauges, outer controls, pumps and nearby piping & fittings
c. all of the above
all of the above
Which of the following is not true about air admittance valves (AAVs)?
a. gravity operated
b. they close when drainage flow creates positive pressure
c. they are not allowed in some states and regions
they close when drainage flow creates positive pressure
