Maintenance Technician Test Quiz With Questions And Answers

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Questions: 50 | Attempts: 44,290 | Updated: Nov 18, 2024

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Maintenance Technician Test Quiz With Questions And Answers - Quiz

Do you wish to pursue your career as a maintenance technician? Are you preparing for any entrance exams? Try this maintenance technician test questions and answers quiz. A maintenance technician is a professional responsible for keeping buildings running smoothly by repairing wiring, replacing light bulbs, installing new equipment, etc.

Within this quiz, you'll encounter maintenance technician assessment test questions that challenge your understanding of troubleshooting techniques, preventive maintenance strategies, equipment diagnostics, and safety protocols. From identifying electrical circuitry to assessing hydraulic systems and interpreting building codes, this quiz will put your knowledge to the test. Furthermore, you'll delve into topics Read morelike equipment calibration, facility management practices, regulatory compliance, and environmental considerations.

Maintenance Technician Test Questions and Answers

1.

A safety ground circuit interrupter is used to protect:
- A.
  
  Receptacles close to water fixtures
- B.
  
  Swimming pool lights
- C.
  
  Outdoor receptacles
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
A safety ground circuit interrupter is a device that is used to protect against electrical shock. It works by quickly shutting off power to the circuit if it detects a current imbalance, such as when electricity is flowing through a person's body. This makes it an essential safety measure in areas where there is a higher risk of electrical shock, such as receptacles close to water fixtures, swimming pool lights, and outdoor receptacles. Therefore, the correct answer is "All of the above."

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16
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2.

Which area(s) are not permitted to have Romex wire used?
- A.
  
  Residential dwellings (inside walls).
- B.
  
  Surface-mounted applications.
- C.
  
  Residential dwellings (attics).
- D.
  
  All of the above
Correct Answer
B. Surface-mounted applications.

Explanation
Romex wire is a type of electrical wiring commonly used in residential buildings. It is not permitted to be used in surface-mounted applications because it is not designed to be exposed and can be easily damaged or pose a safety hazard. Romex wire is typically installed inside walls of residential dwellings and can also be used in attics. Therefore, the correct answer is surface-mounted applications.

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13
1
3.

What is the primary purpose of a Programmable Logic Controller (PLC) in industrial automation?
- A.
  
  To monitor production line output
- B.
  
  To manually control machine tools
- C.
  
  To automate machine functions based on programmed instructions
- D.
  
  To provide static electricity safety
Correct Answer
C. To automate machine functions based on programmed instructions

Explanation
A Programmable Logic Controller (PLC) is an essential component in industrial automation used to automate machinery and industrial processes. It operates as a digital computer designed to handle the rigors of the manufacturing environment and is programmed to perform specific tasks, such as controlling machines or factory assembly lines, where reliable control, ease of programming, and fault diagnosis are necessary.

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9
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4.

A pressurized water pipe needs to have a "fall" when installed.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
A pressurized water pipe does not need to have a "fall" when installed. In fact, pressurized water pipes are typically installed in a way that allows water to flow against gravity, meaning they can be installed horizontally or even uphill if necessary. The concept of having a "fall" is more relevant to gravity-fed water systems, where the water flows downhill due to gravity.

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9
0
5.

Identify this piece of equipment:
- A.
  
  Photocell: turns exterior lights on and off from dusk until dawn.
- B.
  
  Switching/Reversing valve: in the condenser of a heat pump.
- C.
  
  Tank to Towel Gasket: seals water from leaking between tank and bowl.
- D.
  
  Ballast: used to start fluorescent tubes/lights.
Correct Answer
A. pHotocell: turns exterior lights on and off from dusk until dawn.

Explanation
A photocell is a device that detects and measures light. In the context of this question, it is used to turn exterior lights on and off based on the amount of light present. During dusk, when it starts to get dark, the photocell detects the decrease in light and triggers the lights to turn on. Conversely, during dawn, when it starts to get light, the photocell detects the increase in light and triggers the lights to turn off. This automated process ensures that the lights are only on when needed, saving energy and providing convenience.

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7
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6.

What should you use at the base of a new kitchen faucet when replacing it?
- A.
  
  Putty
- B.
  
  Cardboard
- C.
  
  Soap
- D.
  
  PVC Glue
Correct Answer
A. Putty

Explanation
When replacing a kitchen faucet, it is recommended to use putty at the base. Putty is a pliable substance that helps create a watertight seal between the faucet and the sink surface. It prevents water from leaking around the edges and keeps the faucet securely in place. Using putty ensures a proper installation and helps maintain the integrity of the plumbing system.

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8
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7.

Identify this piece of equipment:
- A.
  
  Ballast: Used to start fluorescent tubes/lights.
- B.
  
  Contactor: 24 volt pulls contactor down to send high voltage to A/C.
- C.
  
  Mixet Cartridge: Shower valves.
- D.
  
  Transformer: used to raise and reduce voltage.
Correct Answer
D. Transformer: used to raise and reduce voltage.

Explanation
The given answer correctly identifies a transformer as a piece of equipment used to raise and reduce voltage. Transformers are electrical devices that are used to transfer electrical energy between two or more circuits through electromagnetic induction. They are commonly used in power distribution systems to increase or decrease the voltage levels for efficient transmission and distribution of electricity. Transformers play a crucial role in various electrical applications, including power generation, transmission, and utilization.

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4
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8.

Identify this piece of equipment:
- A.
  
  Tank-to-bowl gasket: seals water from leaking between the tank and bowl.
- B.
  
  Sump Pump: Using a float switch, it pumps water out of flooded areas.
- C.
  
  Mixet Cartridge: Shower valves.
- D.
  
  Faucet Seat: Acts as a stop for bathroom sink and shower stems.
Correct Answer
B. Sump Pump: Using a float switch, it pumps water out of flooded areas.

Explanation
The correct answer is Sump Pump: Using a float switch, it pumps water out of flooded areas. A sump pump is a device that is used to remove water that has accumulated in a sump pit, which is typically found in the basement of a building. The float switch activates the pump when the water level rises above a certain point, and the pump then pumps the water out of the pit and away from the building, preventing flooding and water damage.

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3
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9.

Identify this piece of equipment:
- A.
  
  Capacitor: Stores electrical energy.
- B.
  
  Oven Thermostat: Gas and electric stoves.
- C.
  
  Key gauge: Measures and cuts in keys that correspond to pin numbers.
- D.
  
  Range hood filter: stove range hoods.
Correct Answer
C. Key gauge: Measures and cuts in keys that correspond to pin numbers.

Explanation
That tool is a key gauge, an essential instrument in a locksmith's toolkit. It features a series of graduated slots, each designed to accommodate different key types and manufacturers. These slots allow locksmiths to precisely measure the depths of the cuts on a key, providing crucial information about its unique structure. Furthermore, the gauge helps determine the "bitting" of a key, which is essentially a code that represents the specific depths and spacing of the cuts.

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3
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10.

Identify this piece of equipment:
- A.
  
  Capacitor: Stores electrical energy.
- B.
  
  Contactor: 24 volt pulls contactor down to send high voltage to A/C.
- C.
  
  Switching/Reversing valve: in the condenser of a heat pump.
- D.
  
  Oven Thermostat: Gas and electric stoves.
Correct Answer
B. Contactor: 24 volt pulls contactor down to send high voltage to A/C.

Explanation
The correct answer is Contactor: 24 volt pulls contactor down to send high voltage to A/C. A contactor is an electrical switch that is used to control the flow of electricity to a high-powered device, such as an air conditioning unit. In this case, the contactor is activated by a 24-volt signal, which causes it to close and allow high voltage to be sent to the A/C unit. This allows the A/C unit to turn on and off as needed to maintain the desired temperature.

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5
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11.

Identify this piece of equipment:
- A.
  
  Capacitor: Stores electrical energy.
- B.
  
  Sump pump: Using a float switch, it pumps water out of flooded areas.
- C.
  
  Switching/Reversing valve: in the condenser of a heat pump.
- D.
  
  Photocell: Turns exterior lights on and off from dusk until dawn.
Correct Answer
A. Capacitor: Stores electrical energy.

Explanation
The given answer correctly identifies a capacitor as a piece of equipment that stores electrical energy. A capacitor is an electronic component that consists of two conductive plates separated by an insulating material. When a voltage is applied across the plates, it charges the capacitor and stores electrical energy. This stored energy can be released later to provide a sudden burst of power or to stabilize voltage levels in a circuit. Capacitors are commonly used in various electronic devices and systems for energy storage and power regulation purposes.

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4
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12.

Identify this piece of equipment:
- A.
  
  Tub overflow gasket: This prevents water from leaking through the overflow plate.
- B.
  
  Tank-to-bowl gasket: seals water from leaking between tank and bowl.
- C.
  
  Mixet cartridge: shower valves.
- D.
  
  Burner receptacle: electric stovetops.
Correct Answer
B. Tank-to-bowl gasket: seals water from leaking between tank and bowl.

Explanation
The tank-to-bowl gasket is a piece of equipment that is used to seal water from leaking between the tank and the bowl of a toilet. It is an essential component in maintaining the proper functioning of the toilet and preventing any water leakage. Without this gasket, water could seep out and cause damage to the surrounding area. Therefore, it is important to ensure that the tank-to-bowl gasket is in good condition and properly installed.

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4
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13.

Swimming pool lights should always be protected with what to prevent electrical shock?
- A.
  
  Warning sign
- B.
  
  Plastic cover
- C.
  
  30 amp circuit breaker
- D.
  
  Ground fault circuit interrupter.
Correct Answer
D. Ground fault circuit interrupter.

Explanation
Swimming pool lights should always be protected with a ground fault circuit interrupter (GFCI) to prevent electrical shock. A GFCI is designed to detect any imbalance in the electrical current and quickly shut off the power if it senses a ground fault or leakage of current. This is crucial in a wet environment like a swimming pool, where the risk of electrical shock is higher. A warning sign may alert people to the presence of electrical equipment, but it does not provide the necessary protection. A plastic cover and a 30 amp circuit breaker are also not specifically designed to prevent electrical shock in a swimming pool.

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3
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14.

Identify this piece of equipment:
- A.
  
  Faucet Seat: Acts as a stop for bathroom sink and shower stems.
- B.
  
  Tank supply line: toilets only.
- C.
  
  Transformer: used to raise and reduce voltage.
- D.
  
  Contactor: 24 volt pulls contactor down to send high voltage to A/C.
Correct Answer
A. Faucet Seat: Acts as a stop for bathroom sink and shower stems.

Explanation
The correct answer is Faucet Seat: Acts as a stop for bathroom sink and shower stems. A faucet seat is a small metal or plastic piece that is located inside the faucet body. It acts as a stop for the bathroom sink and shower stems, allowing the user to control the flow of water by turning the faucet handle. When the handle is turned, it presses against the faucet seat, creating a watertight seal and preventing any water from leaking out.

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2
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15.

What would you use to measure electrical amperage?
- A.
  
  Ohmmeter
- B.
  
  Amp probe
- C.
  
  Megger meter
- D.
  
  Wiggy
Correct Answer
B. Amp probe

Explanation
An amp probe is used to measure electrical amperage. It is a specialized tool that can be clamped around a wire to measure the current flowing through it. The probe detects the magnetic field generated by the current and provides a reading of the amperage. This allows electricians and technicians to accurately measure the amount of current in a circuit without breaking the circuit or interrupting the flow of electricity.

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2
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16.

Choose the primary colors used in single-phase 120/240-volt wiring.
- A.
  
  Brown, orange, yellow, gray, green
- B.
  
  Brown, red, black, green
- C.
  
  Black, red, white, green
- D.
  
  Black, red, white, blue
Correct Answer
C. Black, red, white, green

Explanation
The primary colors used in single-phase 120/240-volt wiring are black, red, white, and green. Black is typically used for the hot wire, red is used for another hot wire or a switched wire, white is used for the neutral wire, and green is used for the ground wire. These colors are standardized and widely used in electrical installations to ensure safety and consistency.

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2
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17.

Before working on an electrical subpanel, you should always:
- A.
  
  Wear safety glasses
- B.
  
  Turn off power
- C.
  
  Install a circuit "lock out" tag.
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
When working on an electrical subpanel, it is important to take necessary safety precautions. Wearing safety glasses is important to protect the eyes from any potential debris or sparks. Turning off the power is crucial to prevent any electrical shocks or accidents. Installing a circuit "lock out" tag ensures that no one else can accidentally turn the power back on while you are working. Therefore, all of the given options are necessary steps to ensure safety while working on an electrical subpanel.

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1
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18.

The maximum overcurrent circuit interrupter breaker for 14-gage wire is which of the following?
- A.
  
  15 amps
- B.
  
  20 amps
- C.
  
  30 amps
- D.
  
  50 amps
Correct Answer
A. 15 amps

Explanation
The maximum overcurrent circuit interrupter breaker for 14-gauge wire is 15 amps. This is because the ampacity of a wire determines the maximum amount of current it can safely carry without overheating. In the case of 14-gauge wire, the ampacity is 15 amps, meaning that a circuit breaker with a higher amp rating could potentially overload and damage the wire. Therefore, a 15-amp circuit interrupter breaker is the appropriate choice for 14-gauge wire.

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2
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19.

You would not utilize a ground wire to:
- A.
  
  Carry voltage load
- B.
  
  Bond G.F.C.I. plugs
- C.
  
  Bond metal boxes
- D.
  
  Bond pool lights
Correct Answer
A. Carry voltage load

Explanation
A ground wire is not used to carry voltage load because its main purpose is to provide a safe path for electrical current to flow in the event of a fault or short circuit. It is used to redirect the current away from the user and into the ground, preventing electric shock and other hazards. Therefore, a ground wire is not necessary for carrying voltage load as it is not designed for that purpose.

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1
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20.

A circuit breaker trips off occasionally for no apparent reason. You should:
- A.
  
  Install a smaller circuit breaker.
- B.
  
  Keep resetting the breaker.
- C.
  
  Investigate the cause.
- D.
  
  Install a larger circuit beaker.
Correct Answer
C. Investigate the cause.

Explanation
The correct answer is to investigate the cause because a circuit breaker tripping off occasionally for no apparent reason indicates a potential underlying issue. By investigating the cause, one can identify any faulty wiring, overloaded circuits, or other electrical problems that may be causing the circuit breaker to trip. This will help in resolving the issue and ensuring the safety and proper functioning of the electrical system.

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1
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21.

Choose the smallest wire:
- A.
  
  #2 gauge
- B.
  
  #6 gauge
- C.
  
  #12 gauge
- D.
  
  #14 gauge
Correct Answer
D. #14 gauge

Explanation
The smallest wire size among the given options is #14 gauge. Wire gauge refers to the diameter of the wire, and a smaller gauge number indicates a larger wire diameter. Therefore, #14 gauge is smaller than #2 gauge, #6 gauge, and #12 gauge.

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22.

Usually, the white wire is used for:
- A.
  
  Ground wire
- B.
  
  Common wire
- C.
  
  Hotwire
- D.
  
  Tie wire
Correct Answer
B. Common wire

Explanation
The white wire is typically used as the common wire in electrical circuits. It is used to complete the circuit and provide a return path for the electrical current. Unlike the hot wire, which carries the current from the power source to the device, the common wire carries the current back to the power source. This helps to ensure the smooth and safe flow of electricity in the circuit.

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4
1
23.

Identify this piece of equipment:
- A.
  
  Transformer: used to raise and reduce voltage.
- B.
  
  Oven thermostat: Gas and electric ovens.
- C.
  
  Switching/Reversing valve: in the condenser of a heat pump.
- D.
  
  Burner receptacle: Electric stovetops.
Correct Answer
D. Burner receptacle: Electric stovetops.

Explanation
The given answer correctly identifies the equipment as a burner receptacle used in electric stovetops. This is the component where the heating element of the stove is connected and provides the electrical connection for the burner to heat up and cook food.

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2
0
24.

Identify this piece of equipment:
- A.
  
  Mixet cartridge: shower valves.
- B.
  
  Oven thermostat: Gas and electric ovens.
- C.
  
  Transformer: used to raise and reduce voltage.
- D.
  
  Photocell: turns exterior lights on and off from dusk until dawn.
Correct Answer
A. Mixet cartridge: shower valves.

Explanation
The Mixet cartridge is a piece of equipment used specifically for shower valves. It is responsible for controlling the flow and temperature of water in the shower. This cartridge is designed to ensure a smooth and comfortable shower experience by regulating the water pressure and temperature accurately.

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1
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25.

The maximum useable amp load for #12 gauge Romex wire is:
- A.
  
  15 amps
- B.
  
  16 amps
- C.
  
  18 amps
- D.
  
  20 amps
Correct Answer
D. 20 amps

Explanation
The maximum useable amp load for #12 gauge Romex wire is 20 amps. This is because #12 gauge wire is designed to handle a maximum current of 20 amps without exceeding its temperature rating. Using a higher amp load could cause the wire to overheat and potentially lead to a fire hazard. It is important to always follow the manufacturer's guidelines and local electrical codes when determining the appropriate amp load for a specific wire gauge.

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6
2
26.

Electricity will always travel to:
- A.
  
  Common wires
- B.
  
  Black wires
- C.
  
  Sky wires
- D.
  
  Path of least resistance
Correct Answer
D. Path of least resistance

Explanation
Electricity will always travel through the path of least resistance because it follows the path that offers the least opposition to its flow. When there are multiple paths available, electricity will naturally choose the path with the least amount of resistance, as it requires less energy to flow through. This principle is based on Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage applied and inversely proportional to the resistance of the conductor. Therefore, the path of least resistance allows electricity to flow more easily and efficiently.

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3
1
27.

When testing wires, you should protect against electrical shock by:
- A.
  
  Using a volt tester.
- B.
  
  Keep your knees off the ground.
- C.
  
  Wearing your insulated boots.
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
When testing wires, it is important to protect against electrical shock. Using a volt tester helps to ensure that the wires are not live before touching them. Keeping your knees off the ground prevents the possibility of creating a path for electrical current to flow through your body. Wearing insulated boots provides an additional layer of protection against electric shock. Therefore, all of the above options should be followed to protect against electrical shock when testing wires.

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28.

Identify this piece of equipment:
- A.
  
  Key gauge: measures cut-in keys that correspond to pin numbers.
- B.
  
  Switching/Reversing valve: in the condenser of a heat pump.
- C.
  
  Tub overflow gasket: prevents from leaking through the overflow plate.
- D.
  
  Transformer: used to raise and reduce voltage.
Correct Answer
B. Switching/Reversing valve: in the condenser of a heat pump.

Explanation
The switching/reversing valve is a piece of equipment found in the condenser of a heat pump. It is responsible for reversing the flow of refrigerant in the heat pump system, allowing it to switch between heating and cooling modes. By changing the direction of the refrigerant flow, the valve controls whether the heat pump extracts heat from the indoor air and releases it outside (cooling mode) or absorbs heat from the outdoor air and transfers it indoors (heating mode). This valve plays a crucial role in the operation of a heat pump, allowing it to provide both heating and cooling functions.

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3
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29.

What should you do if you locate the main water leaking?
- A.
  
  Shut off the main and call a plumber.
- B.
  
  Shut the main valve off and locate the leak.
- C.
  
  Call the City water department.
- D.
  
  Shut the City water meter off.
Correct Answer
B. Shut the main valve off and locate the leak.

Explanation
If you locate the main water leaking, the first step you should take is to shut off the main valve. This is important to stop the flow of water and prevent further damage. Once the main valve is shut off, you can then proceed to locate the leak and assess the situation. Calling a plumber may be necessary depending on the severity of the leak, but the immediate action should be shutting off the main valve.

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1
1
30.

Identify this piece of equipment:
- A.
  
  Tank-to-bowl gasket: seals water from leaking between tank and bowl.
- B.
  
  Range hood filter: stove range hoods.
- C.
  
  Tub overflow gasket: prevents water from leaking through the overflow plate.
- D.
  
  Faucet seat: acts as a stop for bathroom sink and shower stems.
Correct Answer
C. Tub overflow gasket: prevents water from leaking through the overflow plate.

Explanation
The tub overflow gasket is a piece of equipment that is designed to prevent water from leaking through the overflow plate. The overflow plate is located near the top of the bathtub and is responsible for draining excess water if the tub becomes too full. The gasket creates a watertight seal between the overflow plate and the tub, ensuring that water does not leak out through this area. This helps to prevent water damage and keeps the bathroom floor dry.

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2
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31.

Is it advisable to use PVC pipe fittings for hot water?
- A.
  
  No, never
- B.
  
  Yes, only sometimes
- C.
  
  Always
- D.
  
  It can be tried.
Correct Answer
A. No, never

Explanation
It is not advisable to use PVC pipe fittings for hot water because PVC pipes have a lower melting point compared to other materials like copper or steel. Hot water can cause the PVC pipes to soften and potentially melt, leading to leaks or bursts in the plumbing system. Therefore, it is recommended to use materials specifically designed for hot water applications to ensure safety and prevent any potential damage.

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1
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32.

When placing an order for a passage door, which of the following must be considered?
- A.
  
  Height, width, and thickness
- B.
  
  Type of door
- C.
  
  Left or right hand
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
When placing an order for a passage door, it is important to consider the height, width, and thickness of the door. This is necessary to ensure that the door fits properly in the designated space. Additionally, the type of door must be taken into account as different types of doors have different functionalities and features. Lastly, it is crucial to specify whether the door should be left-handed or right-handed, as this determines the direction in which the door swings open. Therefore, all of the options mentioned in the question must be considered when placing an order for a passage door.

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33.

In order to meet the requirements for residential use, what is the required temperature for hot water?
- A.
  
  110 degrees
- B.
  
  115 degrees
- C.
  
  120 degrees
- D.
  
  125 degrees
Correct Answer
C. 120 degrees

Explanation
The required temperature for hot water in residential use is 120 degrees. This temperature is considered optimal for various household activities such as bathing, washing dishes, and laundry. It is hot enough to kill bacteria and provide comfort, but not too hot to cause scalding or burns. Additionally, setting the water heater at this temperature helps to conserve energy and prevent overheating.

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34.

Three of the four types of fires listed below commonly occur in apartments. Select the one that does not apply:
- A.
  
  Grease
- B.
  
  Spontaneous Combustion
- C.
  
  Electrical
- D.
  
  Gas
Correct Answer
B. Spontaneous Combustion

Explanation
Spontaneous combustion is the process of self-ignition without an external heat source. While grease fires, electrical fires, and gas fires are all common in apartments, spontaneous combustion is less likely to occur. This is because spontaneous combustion typically requires specific conditions, such as the presence of combustible materials and a buildup of heat, which are less likely to be found in an apartment setting. Therefore, spontaneous combustion does not apply to the types of fires commonly occurring in apartments.

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35.

Apartment communities prefer one type of fire extinguisher. Which of the below is it?
- A.
  
  Pressurized water
- B.
  
  CO2
- C.
  
  ABC
- D.
  
  Halon
Correct Answer
C. ABC

Explanation
Apartment communities prefer the ABC fire extinguisher because it is a multi-purpose extinguisher that can effectively put out fires caused by ordinary combustible materials (such as wood or paper), flammable liquids (such as gasoline or oil), and electrical equipment. This type of extinguisher is versatile and can handle a wide range of fire hazards commonly found in apartment buildings. Pressurized water extinguishers are not suitable for electrical fires, CO2 extinguishers are more commonly used for electrical equipment, and Halon extinguishers are being phased out due to environmental concerns.

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36.

Identify this piece of equipment:
- A.
  
  Range hood filter: stove range hoods.
- B.
  
  Ballast: used to start fluorescent tubes/lights.
- C.
  
  Capacitor: stores electrical energy.
- D.
  
  Transformer: Used to raise and reduce voltage.
Correct Answer
A. Range hood filter: stove range hoods.

Explanation
This piece of equipment, the range hood filter, is specifically designed for stove range hoods. Range hoods are used in kitchens to remove smoke, steam, and odors that result from cooking. The range hood filter plays a crucial role in trapping grease, smoke particles, and other airborne contaminants, preventing them from recirculating back into the kitchen. Regular cleaning and maintenance of the range hood filter is necessary to ensure its effectiveness in maintaining clean and healthy air in the kitchen.

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37.

You are looking for a gas leak - what could help?
- A.
  
  Spray soapy water from a spray bottle on all gas fittings.
- B.
  
  Use a lighter for all gas fittings.
- C.
  
  CO2 tester
- D.
  
  Increase pressure to the lines to 60 lbs of pressure.
Correct Answer
A. Spray soapy water from a spray bottle on all gas fittings.

Explanation
Spraying soapy water from a spray bottle on all gas fittings can help in detecting a gas leak. When there is a gas leak, bubbles will form at the site of the leak due to the escaping gas mixing with the soapy water. This method is commonly used because it is simple, effective, and safe. Using a lighter for all gas fittings is not recommended as it can be dangerous and may cause a fire or explosion. A CO2 tester is not suitable for detecting gas leaks, as it is used to measure carbon dioxide levels. Increasing pressure to the lines is also not a recommended method for detecting gas leaks.

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38.

The hot water is on which side of the faucet?
- A.
  
  Left
- B.
  
  Right
- C.
  
  Center
- D.
  
  None of the above
Correct Answer
A. Left

Explanation
The hot water is on the left side of the faucet because traditionally, in many countries, hot water is connected to the left handle or knob of the faucet. This is a common convention that helps people easily identify and adjust the temperature of the water. However, it's important to note that this may vary depending on the region or specific plumbing installation.

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39.

What material is used for water lines (interior)?
- A.
  
  Black steel
- B.
  
  ABS
- C.
  
  Copper
- D.
  
  PVC
Correct Answer
C. Copper

Explanation
Copper is a commonly used material for interior water lines. It is valued for its durability and resistance to corrosion, making it a suitable choice for plumbing systems. Other materials, such as PVC (polyvinyl chloride) and ABS (acrylonitrile-butadiene-styrene), are often used for drain and waste lines but may not be used for carrying potable water in all locations. Black steel pipes are typically used for gas lines and other applications, but they are not commonly used for interior water supply lines.

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4
1
40.

How would you decrease the pressure if the main water pressure was over 80 lbs?
- A.
  
  Install a pressure regulator.
- B.
  
  Shut the main water meter valve by 50%.
- C.
  
  Close the main water valve by 50%.
- D.
  
  None of the above
Correct Answer
A. Install a pressure regulator.

Explanation
Installing a pressure regulator is the correct answer because a pressure regulator is specifically designed to decrease the pressure in a water system. By installing a pressure regulator, it can effectively reduce the main water pressure to a safe level below 80 lbs. The other options, such as shutting the main water meter valve or closing the main water valve, may restrict the flow of water but they do not specifically address the issue of reducing the pressure.

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1
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41.

A thermocouple is used to:
- A.
  
  Hold a pilot light open.
- B.
  
  Clean water
- C.
  
  Test water
- D.
  
  Start a BBQ
Correct Answer
A. Hold a pilot light open.

Explanation
A thermocouple is a device that generates a small electric current when there is a temperature difference between its two ends. This current is used to keep a pilot light open in a gas appliance. The heat from the pilot light causes the thermocouple to generate the current, which in turn keeps a valve open, allowing the flow of gas to the pilot light. If the pilot light goes out, the thermocouple cools down, stops generating the current, and the valve closes, preventing the flow of gas and ensuring safety.

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5
1
42.

You are responding to an overflowing toilet. What should you do?
- A.
  
  Shut off the water at the angle stop.
- B.
  
  Keep trying to flush.
- C.
  
  Remove the water from the toilet bowl with a bucket or pan.
- D.
  
  Place a towel in the toilet bowl to keep the water from overflowing; then call a plumber.
Correct Answer
A. Shut off the water at the angle stop.

Explanation
To respond to an overflowing toilet, the best course of action is to shut off the water at the angle stop. This will stop the flow of water into the toilet and prevent further overflow. Keeping trying to flush or removing water from the bowl may not effectively solve the problem and could potentially worsen the situation. Placing a towel in the bowl is a temporary measure to prevent water from overflowing, but it does not address the root cause of the issue. Calling a plumber is recommended after shutting off the water to fix the problem.

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1
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43.

Identify this piece of equipment:
- A.
  
  Capacitor: stores electrical energy.
- B.
  
  Switching/Reversing valve: in the condenser of a heat pump.
- C.
  
  Tub overflow gasket: prevents water from leaking through the overflow plate.
- D.
  
  Tank supply line: toilets only.
Correct Answer
D. Tank supply line: toilets only.

Explanation
The given options describe different pieces of equipment and their functions. The correct answer, "Tank supply line: toilets only," indicates that this particular equipment is specifically used in toilets. It suggests that the tank supply line is a component that is exclusive to toilets and is not found in other equipment mentioned in the options.

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44.

You are sealing the base of a toilet. What will you use?
- A.
  
  Wax ring
- B.
  
  Putty
- C.
  
  Glue
- D.
  
  Plumber's tape
Correct Answer
A. Wax ring

Explanation
A wax ring is commonly used to seal the base of a toilet. It is a soft and pliable material that is placed between the toilet and the floor flange to create a watertight seal. The wax ring is able to conform to any irregularities in the floor or toilet base, ensuring a tight fit and preventing any leaks. It is specifically designed for this purpose and is the most effective and commonly used option for sealing the base of a toilet.

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3
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45.

Check all the parts below that are inside of a toilet tank:
- A.
  
  Flush valve
- B.
  
  Ballcock
- C.
  
  Tank-to-bowl gasket
- D.
  
  Flapper
Correct Answer(s)
A. Flush valve
B. Ballcock
D. Flapper

Explanation
The correct answer includes the flush valve, ballcock, and flapper. These are all essential components found inside a toilet tank. The flush valve is responsible for releasing water from the tank into the bowl during flushing. The ballcock is a mechanism that controls the water level in the tank. The flapper is a rubber seal that covers the flush valve opening and is lifted during flushing to release water. These parts work together to ensure the proper functioning of the toilet.

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46.

Preventative maintenance for a water heater requires it to be drained and refilled. How often should it be done?
- A.
  
  When it fails
- B.
  
  Annually
- C.
  
  Every 5 years
- D.
  
  Never
Correct Answer
B. Annually

Explanation
Water heaters should be drained and refilled annually as part of preventative maintenance. This helps to remove sediment and mineral buildup that can accumulate over time, which can affect the efficiency and lifespan of the water heater. Regular maintenance ensures that the water heater operates effectively and reduces the risk of potential issues or failures.

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47.

How often should a smoke detector be checked to see if it is working properly?
- A.
  
  When a service request is received
- B.
  
  Upon move-out of a resident
- C.
  
  Annually
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
A smoke detector should be checked to see if it is working properly in all of the mentioned scenarios. It should be checked when a service request is received to ensure that any issues or malfunctions can be addressed promptly. It should also be checked upon move-out of a resident to ensure that the detector is in proper working condition for the next occupant. Additionally, an annual check is necessary to ensure that the smoke detector is functioning effectively and to replace batteries if needed. Therefore, all of the mentioned options are valid reasons for checking the smoke detector.

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3
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48.

Identify this piece of equipment:
- A.
  
  Contactor: 24 volt pulls contactor down to send high voltage to A/C.
- B.
  
  Capacitor: stores electrical energy.
- C.
  
  Oven Thermostat: Gas and electric ovens.
- D.
  
  Transformer: used to raise and reduce voltage.
Correct Answer
C. Oven Thermostat: Gas and electric ovens.

Explanation
The correct answer is Oven Thermostat: Gas and electric ovens. This piece of equipment is responsible for regulating the temperature in gas and electric ovens. It ensures that the oven heats up to the desired temperature and maintains it throughout the cooking process. The thermostat detects the current temperature and sends signals to the heating elements or gas valve to adjust the heat accordingly.

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1
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49.

Identify this piece of equipment:
- A.
  
  Ballast: used to start fluorescent tubes/lights.
- B.
  
  Mixet cartridge: shower valves.
- C.
  
  Transformer: used to raise and reduce voltage.
- D.
  
  Burner receptacle: electric stovetops.
Correct Answer
A. Ballast: used to start fluorescent tubes/lights.

Explanation
The ballast is a piece of equipment used to start fluorescent tubes or lights. It regulates the electrical current flowing through the tube, providing the initial high voltage needed to start the ionization process. Once the tube is started, the ballast then regulates the current to maintain a steady flow of electricity. Without a ballast, fluorescent lights would not be able to start or operate correctly.

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5
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50.

The ground wire is __________ in color.
- A.
  
  White
- B.
  
  Blue
- C.
  
  Black
- D.
  
  Green
Correct Answer
D. Green

Explanation
The ground wire is typically green in color. This is because green is a universally recognized color for grounding in electrical systems. The purpose of the ground wire is to provide a safe path for electrical currents to flow into the ground in the event of a fault or electrical surge. By using a distinct color like green, it is easier for electricians and technicians to identify and connect the ground wire correctly, ensuring the safety of the electrical system.

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