Free CMRT Basic Questions and Answers

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A pressurized water pipe needs to have a "fall" when installed.

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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 water flows downhill due to gravity.

What is the primary purpose of a Programmable Logic Controller (PLC) in industrial automation?

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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.

Identify this piece of equipment:

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The given answer correctly identifies a capacitor as a piece of equipment that stores electrical energy. A capacitor is an electronic component that consist 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 stabilized voltage levels in a circuit. Capacitors are commonly used in various electronic devices and systems for energy storage and power regulation purposes.

Identify this piece of equipment:

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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 high-powered device, such as an air conditioning unit. In this case, the contractor 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 and off as needed to maintain the desired temperature.

Which area(s) are not permitted to have Romex wire used?

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Romex wire is a type of electrical wiring commonly used in residential buildings. It is not permitted to b 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.

What should you use at the base of a new kitchen faucet when replacing it?

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When replacing a kitchen faucet, it is recommended to use putty at the base. Putty is a pliable substance that helps create a waterlight 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 and helps maintain the integrity of the plumbing system.

A safety ground circuit interrupter is used to protect:

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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 a receptacles close to water fixtures, swimming pool lights, and outdoor receptacles. Therefore, the correct answer is "All of the above."

Identify this piece of equipment:

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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 light 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.

Identify this piece of equipment:

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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. Transformer play a crucial role in various electrical applications, including power generation, transmission and utilization.

Identify this piece of equipment:

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Measures and cuts in keys that correspond to pin numbers.

Identify this piece of equipment:

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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 then pumps 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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