C -10 TROUBLESHOOTING AND MAINTENANCE

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What type of receptacle problem exists if the electrician installs the green wire instead of the black wire and vice-versa?

Open hot

Open neutral

Hot and neutral reversed

Hot and ground reversed (correct)

Which tool tests connections on Cat5, Cat6, phone lines, and television signal cables?

Continuity tester

Multimeter

Clamp meter

Low-voltage tester (correct)

The ESS shuts down and the electrician inspects the system using a thermal camera. The EMTs are showing extremely high temperatures. What is the most likely cause?

System is overloaded (correct)

Sensor is burnt

EMT is not working

Batteries are overcharged

After a new Air Conditioning system is installed, how should the electrical contractor test the circuit?

Turn on the breakers and fire up the system Signup and view all the answers

What is the voltage loss that occurs through all or part of a circuit due to impedance?

Voltage drop Signup and view all the answers

What should be done if two wires are entering a single pole breaker?

Install another breaker Signup and view all the answers

What should you do if a solar battery storage system is no longer efficient?

Replenish the water levels Signup and view all the answers

Which of the following tests should be performed if the A/C is not powering on?

All of the above Signup and view all the answers

What does Kelvin mean in lightbulbs?

Color temperature Signup and view all the answers

Without cutting into insulation, what is the best tool to let you know a circuit is live?

Voltage sniffer Signup and view all the answers

Which two electrical loads are similar and have waveforms that are out of phase with each other?

Inductive and capacitive Signup and view all the answers

What is used to turn on and turn off a circuit manually?

Circuit breaker Signup and view all the answers

Which of the following could be a cause for hotter-than-normal incandescent light bulbs?

Improper ventilation Signup and view all the answers

If the voltage lags the current in the power circuit, what can be used to fix it?

Inductor Signup and view all the answers

If the voltage is leading current in the power circuit, what can be used to fix it?

Capacitor Signup and view all the answers

Which tool measures voltage?

Voltmeter Signup and view all the answers

How do you reverse a 10-horsepower 3-phase motor? Note: the electric motor is activated by a 3-phase supply; phase A, B, and C.

All of the above Signup and view all the answers

Which of the following cables should be removed if not in use?

None of the above Signup and view all the answers

Which of the following is considered to have a resistive load?

Incandescent light Signup and view all the answers

In what order do you turn on (energize) the panel for the first time?

Downstream, by turning on and checking each breaker one by one Signup and view all the answers

A circuit breaker stays in the “tripped” position, what do you have to do?

Unplug everything that is plugged into that circuit Signup and view all the answers

Which tool measures current in a circuit?

Ammeter Signup and view all the answers

What is the most common cause for light bulbs burning out at a high rate?

High voltage in the system Signup and view all the answers

A restaurant is having its panel upgraded from 100-Amps to 480-Amps, however, the plans submitted by the contractor have errors, who should be contacted first?

Contractor Signup and view all the answers

In which electrical load will you find current lagging behind the voltage?

Inductive load Signup and view all the answers

If the electrical panel is not grounded, what should you do?

Ground the system Signup and view all the answers

What tester do you use for AFCI outlets?

Arc-fault tester Signup and view all the answers

What test should be performed after installing a range outlet?

Voltage test Signup and view all the answers

Incandescent lights have been known to flicker because:

Of loose aluminum wire connections Signup and view all the answers

A ___________ is any circuit that controls another circuit through a relay.

Remote-control circuit Signup and view all the answers

If the service panel develops rust inside of the main panel, what should the Electrician do?

Inspect the panel, the weather head, service entrance, and cables Signup and view all the answers

If you are working on an older home that has a 2-wire system and there is no ground in the outlet box, what kind of outlet should be installed?

Put same 2-wire receptacle Signup and view all the answers

A(n) _________ will protect solar batteries from overcharging by the array.

Charge controller Signup and view all the answers

A solar battery’s electrolyte solution will have a specific gravity value, for example, an Edison cell has a normal specific gravity of approximately 1.200 at 60 degrees Fahrenheit. What happens when the specific gravity level falls below the designated low-limit amount?

The battery will be sluggish, lose capacity, and breakdown rapidly Signup and view all the answers

Loose hanging wires should be:

Anchored or strapped Signup and view all the answers

When testing an Energy Storage System (ESS), the battery voltage and amperage show a good reading, however, the inverter output is lower than required, what could be the problem?

The problem is in the inverter Signup and view all the answers

If the clothes dryer is not blowing hot air and you have tested the circuit for 240 volts, what could be the problem?

A thermal fuse is blown in the dryer Signup and view all the answers

Which of the following causes an “open ground” electrical problem?

Non-grounded receptacle was installed instead of a grounded receptacle Signup and view all the answers

Ron, a licensed electrician, is on a service call. The client tells Ron that the microwave and washing machine are not working but when the client unplugged both appliances and tried another electrical device it worked without any problems. What kind of test should Ron perform on the electrical system?

Voltage test Signup and view all the answers

What would you use to measure the amount of current a circuit is pulling without having to penetrate the sheath of the wire?

Clamp-on meter Signup and view all the answers

Which tool tells the user a light switch is malfunctioning?

Continuity tester Signup and view all the answers

Your receptacle tester reads “open neutral,” what is the most common location of the problem?

The receptacle upstream has a disconnected neutral Signup and view all the answers

How do you protect a solar battery’s cell top from moisture?

Paint with rosin or liquid Esbaline Signup and view all the answers

What must be done if Romex cable is attached to the edge of a joist using cable staples?

Install the cable by drilling holes through the framing member Signup and view all the answers

Which tool measures active power?

Wattmeter Signup and view all the answers

Which tool measures resistance?

Ohmmeter Signup and view all the answers

As the electrical subcontractor, you are called to the job site because there is a problem with the power tools tripping the temporary power station. What is your first step?

Check to see if all breakers are tripped Signup and view all the answers

Which tool measures voltage, current, and resistance?

Multimeter Signup and view all the answers

When lead-acid batteries are charged and discharged, the electrolyte concentration increases and decreases to a fixed maximum value. What is the concentration expressed as?

The specific gravity of the solution Signup and view all the answers

Which tool measures receptacle problems?

Receptacle tester Signup and view all the answers

Which tool tells the electrician the exact circuit that needs to be disconnected?

Circuit breaker finder Signup and view all the answers

Which of the following is LEAST likely to be spliced together in an outlet box?

Hot and neutral Signup and view all the answers

Solar battery vent caps are accessed:

When checking the electrolyte or adding water Signup and view all the answers

Who has the authority to turn on power to a residence or building?

Utility company Signup and view all the answers

Which of the following electrical problems will run electronic equipment even though an electrical problem exists?

Hot and neutral reversed Signup and view all the answers

It is common for residential homes built prior to the year 2000 to use plugs for electric dryers and homes built after the year 2000 commonly use plugs.

3-prong, 4-prong Signup and view all the answers

Which of the following will have the shortest life expectancy?

CFLs Signup and view all the answers

A couple has purchased a new home. Upon initial inspection all electric circuits worked without a problem, however, when the couple tried to turn on a table lamp using a switch, nothing happened. What could be the problem?

All of the above Signup and view all the answers

If your client requests to upgrade the panel from 100-amps to 200-amps, what should be your first step?

Check incoming feeders to support the 200-amp panel Signup and view all the answers

If Adam is called out on a service call because the homeowner’s outlets are all dead, what should Adam’s first step be when he tests the circuit?

Check the breaker Signup and view all the answers

What is the proper way to disconnect inoperable wires in the master bedroom outlet?

Terminate the wires at the junction box Signup and view all the answers

A new employee pulls wire from the breaker to its destination, however, you discover that a conductor is undersized for the rated breaker, what should be done?

Install a new conductor Signup and view all the answers

If your circuit does not have a complete path for current flow, what tool will be used for testing continuity?

Multimeter Signup and view all the answers

Who should be contacted if the drywall contractor severs a Romex cable?

Prime contractor Signup and view all the answers

How do you protect solar battery terminals?

Coat with petroleum jelly, grease, or other corrosion inhibitor Signup and view all the answers

When renewing the solution for a nickel-iron-alkaline battery, you must first discharge the battery at a normal rate to zero, and then short-circuit for 2 hours or more. Why?

To protect the elements Signup and view all the answers

What are the pre-check items to perform on a distribution panel before start-up?

Visually inspect then check phase to phase and line to ground with a continuity tester and an ohmmeter Signup and view all the answers

C -10 TROUBLESHOOTING AND MAINTENANCE

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Questions and Answers

What type of receptacle problem exists if the electrician installs the green wire instead of the black wire and vice-versa?

Which tool tests connections on Cat5, Cat6, phone lines, and television signal cables?

The ESS shuts down and the electrician inspects the system using a thermal camera. The EMTs are showing extremely high temperatures. What is the most likely cause?

After a new Air Conditioning system is installed, how should the electrical contractor test the circuit?

What is the voltage loss that occurs through all or part of a circuit due to impedance?

What should be done if two wires are entering a single pole breaker?

What should you do if a solar battery storage system is no longer efficient?

Which of the following tests should be performed if the A/C is not powering on?

What does Kelvin mean in lightbulbs?

Without cutting into insulation, what is the best tool to let you know a circuit is live?

Which two electrical loads are similar and have waveforms that are out of phase with each other?

What is used to turn on and turn off a circuit manually?

Which of the following could be a cause for hotter-than-normal incandescent light bulbs?

If the voltage lags the current in the power circuit, what can be used to fix it?

If the voltage is leading current in the power circuit, what can be used to fix it?

Which tool measures voltage?

How do you reverse a 10-horsepower 3-phase motor? Note: the electric motor is activated by a 3-phase supply; phase A, B, and C.

Which of the following cables should be removed if not in use?

Which of the following is considered to have a resistive load?

In what order do you turn on (energize) the panel for the first time?

A circuit breaker stays in the “tripped” position, what do you have to do?

Which tool measures current in a circuit?

What is the most common cause for light bulbs burning out at a high rate?

A restaurant is having its panel upgraded from 100-Amps to 480-Amps, however, the plans submitted by the contractor have errors, who should be contacted first?

In which electrical load will you find current lagging behind the voltage?

If the electrical panel is not grounded, what should you do?

What tester do you use for AFCI outlets?

What test should be performed after installing a range outlet?

Incandescent lights have been known to flicker because:

A ___________ is any circuit that controls another circuit through a relay.

If the service panel develops rust inside of the main panel, what should the Electrician do?

If you are working on an older home that has a 2-wire system and there is no ground in the outlet box, what kind of outlet should be installed?

A(n) _________ will protect solar batteries from overcharging by the array.

A solar battery’s electrolyte solution will have a specific gravity value, for example, an Edison cell has a normal specific gravity of approximately 1.200 at 60 degrees Fahrenheit. What happens when the specific gravity level falls below the designated low-limit amount?

Loose hanging wires should be:

When testing an Energy Storage System (ESS), the battery voltage and amperage show a good reading, however, the inverter output is lower than required, what could be the problem?

If the clothes dryer is not blowing hot air and you have tested the circuit for 240 volts, what could be the problem?

Which of the following causes an “open ground” electrical problem?

What would you use to measure the amount of current a circuit is pulling without having to penetrate the sheath of the wire?

Which tool tells the user a light switch is malfunctioning?

Your receptacle tester reads “open neutral,” what is the most common location of the problem?

How do you protect a solar battery’s cell top from moisture?

What must be done if Romex cable is attached to the edge of a joist using cable staples?

Which tool measures active power?

Which tool measures resistance?

As the electrical subcontractor, you are called to the job site because there is a problem with the power tools tripping the temporary power station. What is your first step?

Which tool measures voltage, current, and resistance?

When lead-acid batteries are charged and discharged, the electrolyte concentration increases and decreases to a fixed maximum value. What is the concentration expressed as?

Which tool measures receptacle problems?

Which tool tells the electrician the exact circuit that needs to be disconnected?

Which of the following is LEAST likely to be spliced together in an outlet box?

Solar battery vent caps are accessed:

Who has the authority to turn on power to a residence or building?

Which of the following electrical problems will run electronic equipment even though an electrical problem exists?

It is common for residential homes built prior to the year 2000 to use ____ plugs for electric dryers and homes built after the year 2000 commonly use ____ plugs.

Which of the following will have the shortest life expectancy?

A couple has purchased a new home. Upon initial inspection all electric circuits worked without a problem, however, when the couple tried to turn on a table lamp using a switch, nothing happened. What could be the problem?

If your client requests to upgrade the panel from 100-amps to 200-amps, what should be your first step?

If Adam is called out on a service call because the homeowner’s outlets are all dead, what should Adam’s first step be when he tests the circuit?

What is the proper way to disconnect inoperable wires in the master bedroom outlet?

A new employee pulls wire from the breaker to its destination, however, you discover that a conductor is undersized for the rated breaker, what should be done?

If your circuit does not have a complete path for current flow, what tool will be used for testing continuity?

Who should be contacted if the drywall contractor severs a Romex cable?

How do you protect solar battery terminals?

When renewing the solution for a nickel-iron-alkaline battery, you must first discharge the battery at a normal rate to zero, and then short-circuit for 2 hours or more. Why?

What are the pre-check items to perform on a distribution panel before start-up?

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It is common for residential homes built prior to the year 2000 to use plugs for electric dryers and homes built after the year 2000 commonly use plugs.