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Questions and Answers
A house is 72 feet by 32 feet and requires lighting circuits, how many circuits are necessary if 120-volt, 15-amp circuits are desired?
A house is 72 feet by 32 feet and requires lighting circuits, how many circuits are necessary if 120-volt, 15-amp circuits are desired?
- 4 (correct)
- 6
- 15
- 120
If 1,600 watthours were consumed over a period of 8 hours, then how many kilowatts were used every hour?
If 1,600 watthours were consumed over a period of 8 hours, then how many kilowatts were used every hour?
- 200kW
- 1,600kW
- 12,800kW
- 0.2kW (correct)
An electric stove is rated at 4,000 watts and is connected to a 240-volt circuit. What is the resistance of the heating elements?
An electric stove is rated at 4,000 watts and is connected to a 240-volt circuit. What is the resistance of the heating elements?
- 12 Ohms
- 14.4 Ohms (correct)
- 16.6 Ohms
- 57,600 Ohms
Your client’s office equipment is using 3.4 kilowatts per day. How much time will pass before your client will use 3.2 million watts of power?
Your client’s office equipment is using 3.4 kilowatts per day. How much time will pass before your client will use 3.2 million watts of power?
A three-phase 120-volt AC circuit is running a current of 15 amps. If the power factor is 80% then what is the power rating in watts?
A three-phase 120-volt AC circuit is running a current of 15 amps. If the power factor is 80% then what is the power rating in watts?
What is the allowable wattage that can be connected to a 240-volt, 30-amp, single-phase circuit feeding a residential electric heater?
What is the allowable wattage that can be connected to a 240-volt, 30-amp, single-phase circuit feeding a residential electric heater?
How should you install photovoltaic panels on a Spanish clay tile roof?
How should you install photovoltaic panels on a Spanish clay tile roof?
What size flexible cables are used for solar battery interconnections?
What size flexible cables are used for solar battery interconnections?
If an inverter is rated for 40A, what inverter circuit breaker you should be using?
If an inverter is rated for 40A, what inverter circuit breaker you should be using?
Which of the following tools helps prevent an electrician from receiving an electric shock while installing or removing fuses?
Which of the following tools helps prevent an electrician from receiving an electric shock while installing or removing fuses?
Energy storage systems (ESS) will frequently use ________ batteries, mainly due to their significant advances in power density.
Energy storage systems (ESS) will frequently use ________ batteries, mainly due to their significant advances in power density.
How is resistance measured?
How is resistance measured?
A single-phase 120-volt AC circuit is running a current of 15 amps. If the power factor is 80% then what is the power rating in watts?
A single-phase 120-volt AC circuit is running a current of 15 amps. If the power factor is 80% then what is the power rating in watts?
When installing a solar panel array on a sheet metal roof, which of the following will aid in distributing any live loads and dead loads?
When installing a solar panel array on a sheet metal roof, which of the following will aid in distributing any live loads and dead loads?
The inverter requires a MINIMUM voltage input of 350 volts. How many 48-volt modules need to be connected in a series configuration to meet the MINIMUM voltage input?
The inverter requires a MINIMUM voltage input of 350 volts. How many 48-volt modules need to be connected in a series configuration to meet the MINIMUM voltage input?
In a residential setting, which of the following locations should you NOT install an energy storage system?
In a residential setting, which of the following locations should you NOT install an energy storage system?
Aside from plot, architectural, and e-sheets, what portion of the plans are most important to look over thoroughly?
Aside from plot, architectural, and e-sheets, what portion of the plans are most important to look over thoroughly?
An 80W incandescent lightbulb uses 80 watts every hour on a 120-volt circuit. If the Incandescent bulb is turned on for 9 hours, then how many watthours are consumed?
An 80W incandescent lightbulb uses 80 watts every hour on a 120-volt circuit. If the Incandescent bulb is turned on for 9 hours, then how many watthours are consumed?
Which of the following tools does NOT belong in an electrician’s toolbox?
Which of the following tools does NOT belong in an electrician’s toolbox?
If an incandescent light bulb has a resistance of 60 Ohms and is running on a current of 3 amperes, what is the voltage necessary for this circuit?
If an incandescent light bulb has a resistance of 60 Ohms and is running on a current of 3 amperes, what is the voltage necessary for this circuit?
What is the formula of Ohms Law?
What is the formula of Ohms Law?
What size of the circuit breaker can be installed on a line with 7 outlets and 14 AWG wire?
What size of the circuit breaker can be installed on a line with 7 outlets and 14 AWG wire?
A contractor needs 13 receptacles that cost $3.56 each plus sales tax of 7.25%. The supplier states that for every 10 receptacles that are purchased, the contractor will get one free of charge. What is the total cost of the receptacles?
A contractor needs 13 receptacles that cost $3.56 each plus sales tax of 7.25%. The supplier states that for every 10 receptacles that are purchased, the contractor will get one free of charge. What is the total cost of the receptacles?
What is a blocking diode used for in PV systems?
What is a blocking diode used for in PV systems?
Which of the following tools is used to bend conduit without causing physical damage to sharp bends?
Which of the following tools is used to bend conduit without causing physical damage to sharp bends?
If you have to install a ground rod in rocky soil what is acceptable?
If you have to install a ground rod in rocky soil what is acceptable?
What is the equivalent of 1.36kWh?
What is the equivalent of 1.36kWh?
What tool measures the specific gravity (SP) of the electrolyte in a flooded battery?
What tool measures the specific gravity (SP) of the electrolyte in a flooded battery?
What does CO/ALR represent and where is it typically found?
What does CO/ALR represent and where is it typically found?
Which of the following connects a ground wire to the grounding rod?
Which of the following connects a ground wire to the grounding rod?
If you are connecting a 12-v battery set, what PV system design would you consider for your modules?
If you are connecting a 12-v battery set, what PV system design would you consider for your modules?
An energy storage system (ESS) must have an enclosure:
An energy storage system (ESS) must have an enclosure:
The inverter MAXIMUM input voltage is 450 volts. How many 48-volt modules need to be connected in a series configuration to stay under MAXIMUM voltage input?
The inverter MAXIMUM input voltage is 450 volts. How many 48-volt modules need to be connected in a series configuration to stay under MAXIMUM voltage input?
How many kWh will be consumed by a 500w lightbulb running for 3 hours?
How many kWh will be consumed by a 500w lightbulb running for 3 hours?
Suppose that a house requires 3 ceiling fans upstairs and 3 ceiling fans downstairs. If each ceiling fan costs $49.97, what is the total cost for the materials?
Suppose that a house requires 3 ceiling fans upstairs and 3 ceiling fans downstairs. If each ceiling fan costs $49.97, what is the total cost for the materials?
What is the minimum horizontal separation between two outlets located on the opposite sides of a fire-resistance-rated wall assembly?
What is the minimum horizontal separation between two outlets located on the opposite sides of a fire-resistance-rated wall assembly?
What do you use to secure the service entrance wires to the main breaker inside of a panel?
What do you use to secure the service entrance wires to the main breaker inside of a panel?
If a set of blueprints requires the installation of outlet receptacles on a wall but the windows are floor to ceiling, how should the contractor proceed to meet code requirements?
If a set of blueprints requires the installation of outlet receptacles on a wall but the windows are floor to ceiling, how should the contractor proceed to meet code requirements?
If you have 4 mounting brackets per photovoltaic panel, how many brackets will be necessary for 6 panels?
If you have 4 mounting brackets per photovoltaic panel, how many brackets will be necessary for 6 panels?
Fish tape is used to run ______ through walls and electrical conduit.
Fish tape is used to run ______ through walls and electrical conduit.
If you are awarded a contract to pull 300 feet of fiber optics cable, what should you do to ensure a successful install?
If you are awarded a contract to pull 300 feet of fiber optics cable, what should you do to ensure a successful install?
If you receive plans for a bid and notice a code compliance issue, who do you inform?
If you receive plans for a bid and notice a code compliance issue, who do you inform?
A kitchen circuit feeds a total of 8 outlets, if the contractor uses 12 AWG wire, what size circuit breaker will he install?
A kitchen circuit feeds a total of 8 outlets, if the contractor uses 12 AWG wire, what size circuit breaker will he install?
What is the typical operating frequency of alternating current?
What is the typical operating frequency of alternating current?
What’s the maximum amount of bends for a run of metal conduit?
What’s the maximum amount of bends for a run of metal conduit?
Where do you place GFCI outlets in a kitchen?
Where do you place GFCI outlets in a kitchen?
Suppose that a house requires a total of 37 receptacles. You need to purchase 15 standard duplex, 9 GFCI, and 13 AFCI receptacles. Calculate the total cost of materials if the standard duplex receptacles cost $4.90 for a set of ten and each GFCI receptacle costs $1.28 and $1.18 for every AFCI receptacle.
Suppose that a house requires a total of 37 receptacles. You need to purchase 15 standard duplex, 9 GFCI, and 13 AFCI receptacles. Calculate the total cost of materials if the standard duplex receptacles cost $4.90 for a set of ten and each GFCI receptacle costs $1.28 and $1.18 for every AFCI receptacle.
The school replaces three hundred 80-watt incandescent light bulbs with 20-watt LED light bulbs. How much would the school save each year if they would run it for 2000 hours at $0.15/kWh?
The school replaces three hundred 80-watt incandescent light bulbs with 20-watt LED light bulbs. How much would the school save each year if they would run it for 2000 hours at $0.15/kWh?
Your AC circuit is connected to a 480-volt source and draws 8 amps. When you connect a wattmeter, it reads 1400 watts. What is the power factor?
Your AC circuit is connected to a 480-volt source and draws 8 amps. When you connect a wattmeter, it reads 1400 watts. What is the power factor?
Which of the following is the most important to consider when installing photovoltaic panels on the roof?
Which of the following is the most important to consider when installing photovoltaic panels on the roof?
A voltage drop of 12 is found on a 480-volt circuit. What percentage is the voltage drop?
A voltage drop of 12 is found on a 480-volt circuit. What percentage is the voltage drop?
A three-phase generator has a ____ phase difference of a three-phase alternating current.
A three-phase generator has a ____ phase difference of a three-phase alternating current.
An 80W incandescent lightbulb uses 80 watts every hour on a 120-volt circuit. If the Incandescent bulb is turned on for 9 hours, then 720Wh are consumed. If you replaced the incandescent bulb with a 10W LED bulb, you will be saving 70W every hour. If this LED bulb operates for 9 hours, then what is the net savings in watthours when compared to the incandescent bulb?
An 80W incandescent lightbulb uses 80 watts every hour on a 120-volt circuit. If the Incandescent bulb is turned on for 9 hours, then 720Wh are consumed. If you replaced the incandescent bulb with a 10W LED bulb, you will be saving 70W every hour. If this LED bulb operates for 9 hours, then what is the net savings in watthours when compared to the incandescent bulb?
If you receive plans to bid on a residential ground-up that has no existing electrical service, what first must you do?
If you receive plans to bid on a residential ground-up that has no existing electrical service, what first must you do?
If 3,400,000 watthours were consumed over a period of 2 days, then how many kilowatts were used every hour?
If 3,400,000 watthours were consumed over a period of 2 days, then how many kilowatts were used every hour?
Which of the following tools is used in the process of pulling wire?
Which of the following tools is used in the process of pulling wire?
Which wire can you use in both wet locations and where exposed to high temperatures (90°C)?
Which wire can you use in both wet locations and where exposed to high temperatures (90°C)?
Which of the following tools is used to manipulate wire by grabbing it, bending it and even cutting it?
Which of the following tools is used to manipulate wire by grabbing it, bending it and even cutting it?
Your AC circuit is connected to a 120-volt source and draws 10 amps. When you connect a wattmeter, it reads 1200 watts. What is the power factor?
Your AC circuit is connected to a 120-volt source and draws 10 amps. When you connect a wattmeter, it reads 1200 watts. What is the power factor?
Which of the following is a Fire Code requirement for vented batteries or other electrochemical energy storage systems?
Which of the following is a Fire Code requirement for vented batteries or other electrochemical energy storage systems?
A circuit has 22 LED bulbs and each bulb runs a current of 2.5 amps. If 12 volts flows through each bulb, then how many volts are running in the entire circuit?
A circuit has 22 LED bulbs and each bulb runs a current of 2.5 amps. If 12 volts flows through each bulb, then how many volts are running in the entire circuit?
The energy used by a city office is 2.9kW over a period of 8 hours. How many kW were consumed each hour?
The energy used by a city office is 2.9kW over a period of 8 hours. How many kW were consumed each hour?
Which of the following materials is used to fasten conduit to walls or other surfaces?
Which of the following materials is used to fasten conduit to walls or other surfaces?
What is the maximum distance that outlets must be spaced for kitchen countertops?
What is the maximum distance that outlets must be spaced for kitchen countertops?
Which type of current is better for carrying current over a large distance?
Which type of current is better for carrying current over a large distance?
Of the methods provided, which is the best method used for connecting two pieces of conduit together?
Of the methods provided, which is the best method used for connecting two pieces of conduit together?
On new residential construction, you run a 500-foot run of cable and there is a voltage drop of 17.2 volts. What is the percentage of voltage drop in this circuit if it's operating at 600 volts?
On new residential construction, you run a 500-foot run of cable and there is a voltage drop of 17.2 volts. What is the percentage of voltage drop in this circuit if it's operating at 600 volts?
Motors that have 10 horsepower or more are typically:
Motors that have 10 horsepower or more are typically:
What does the newer 2022 California Electrical Code language clarify with regard to bathrooms?
What does the newer 2022 California Electrical Code language clarify with regard to bathrooms?
