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Ssa
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Quizzes Created: 3 | Total Attempts: 67,090
Questions: 20 | Viewed: 62,357

1.

On a 110-volt circuit, the hot wire is normally:

Answer: Black or Red
Explanation:
On a 110-volt circuit, the hot wire is typically black or red. The hot wire carries the electrical current from the power source to the outlet or device. In standard electrical wiring color codes, the black or red wires are designated as hot wires. The white wire is usually the neutral wire, which completes the circuit by carrying current back to the power source. Green or bare wires are used for grounding to prevent electrical shocks. Understanding these color codes is essential for safely working with electrical systems.
2.

What is the purpose of a squirrel cage?

Answer: To move air through the handler.
Explanation:
The purpose of a squirrel cage, commonly found in HVAC systems, is to move air through the air handler. This component, also known as a blower wheel, uses a series of blades arranged in a cylindrical shape to create airflow. As the cage rotates, it draws air into the system and pushes it through the ducts to distribute heated or cooled air throughout the building. This efficient air movement is essential for maintaining indoor comfort and ensuring the HVAC system operates effectively.
3.

Where is a fuse link located?

Answer: On a heat coil
Explanation:
A fuse link is typically located on a heat coil. It is a safety device used in various heating appliances, such as electric furnaces and heating elements, to prevent overheating. The fuse link is designed to melt and break the electrical circuit if the temperature exceeds a certain threshold, thereby protecting the appliance from damage and preventing potential fire hazards. This critical safety component ensures that the heating device operates within safe temperature limits.
4.

Where is a joist found?

Answer: Floor
Explanation:
A joist is found in the floor. Joists are horizontal structural members used to support a floor or ceiling, running between walls or beams to provide stability and distribute loads. They are an essential component in building construction, ensuring that floors are strong and level. Joists can also be found in ceilings, where they support the ceiling and roof structure. Understanding where joists are located helps in tasks such as installing flooring, running electrical wiring, or making structural repairs.
5.

On most garbage disposals, where is the reset button located?

Answer: On the bottom of the disposal
Explanation:
 The reset button on most garbage disposals is located on the bottom of the disposal unit. This button is a safety feature designed to reset the disposal if it overheats or becomes jammed. When the disposal is overloaded or encounters a problem, the reset button will pop out, cutting power to the unit to prevent damage. Pressing the button restores power once the issue is resolved. Knowing the location of the reset button is useful for troubleshooting common problems and maintaining the proper function of your garbage disposal.
6.

What kind of Freon would you suggest for use in an apartment freezer?

Answer: R 22
Explanation:
R 22, also known as HCFC-22, is commonly used as a refrigerant in apartment freezers and air conditioning systems. It has been widely utilized due to its efficiency and effectiveness in cooling. However, it's important to note that R 22 is being phased out due to its ozone-depleting properties and replaced with more environmentally friendly refrigerants like R 410A. If you have an older freezer, it likely uses R 22, but for new systems, it's best to consider modern alternatives that comply with current environmental regulations.
7.

Older refrigerators contain which type of Freon:

Answer: R 12
Explanation:
Older refrigerators commonly contain R 12, also known as Freon-12. R 12 was widely used as a refrigerant in refrigeration and air conditioning systems due to its stable and non-flammable properties. However, it has been phased out because it contributes to ozone layer depletion. Modern refrigerators now use more environmentally friendly refrigerants such as R 134a. Understanding the type of Freon used in older appliances is important for proper maintenance, servicing, and ensuring compliance with environmental regulations when dealing with refrigerants.
8.

Where is the bibb seat located?

Answer: In a faucet
Explanation:
 The bibb seat is located in a faucet. It is a part of the valve assembly in compression faucets, where the washer presses against it to stop the flow of water when the faucet is turned off. Over time, the bibb seat can become worn or damaged, leading to leaks. Replacing or reseating the bibb seat can often fix this issue and restore proper function to the faucet. Understanding the components of a faucet helps in troubleshooting and performing routine maintenance or repairs to prevent water waste and maintain functionality.
9.

As the hot water heater tank is being filled up, you should:

Answer: Purge the tank of air
Explanation:
As the hot water heater tank is being filled up, you should purge the tank of air. This involves opening a hot water faucet in the house to allow air to escape from the tank. Purging the air ensures that the tank fills completely with water, preventing air pockets that can cause uneven heating and potential damage to the heating elements. This step is crucial for the proper operation and longevity of the hot water heater, ensuring that it functions efficiently and safely.
10.

What kind of freon is used in central air conditioning?

Answer: R 22
Explanation:
: R 22, also known as HCFC-22, is commonly used in central air conditioning systems. It has been a standard refrigerant for many years due to its efficiency and effectiveness in cooling. However, due to its ozone-depleting properties, R 22 is being phased out and replaced by more environmentally friendly refrigerants such as R 410A. Understanding the type of Freon used in air conditioning systems is important for proper maintenance, servicing, and ensuring compliance with current environmental regulations.
11.

Taking heat out of the air will do what to the air temperature?

Answer: Lower
Explanation:
 Taking heat out of the air will lower the air temperature. This principle is the basis of how air conditioning and refrigeration systems work. By removing heat from the air, these systems cool the air, making the environment more comfortable. This process involves the use of refrigerants that absorb heat and then release it outside the area being cooled. Understanding this concept is fundamental in the study of thermodynamics and is essential for maintaining and troubleshooting cooling systems.
12.

When charging, vapor should be added to the ____ side of the compressor.

Answer: Low
Explanation:
When charging a refrigeration or air conditioning system, vapor should be added to the low side of the compressor. The low side, or suction side, is where the refrigerant enters the compressor as a low-pressure gas. Adding vapor to this side ensures proper system function and avoids potential damage to the compressor. Charging the system correctly is essential for maintaining efficient operation and preventing issues such as compressor overheating or liquid slugging, which can occur if liquid refrigerant enters the compressor.
13.

What is the best product to use to thin or clean up latex paint?

Answer: Water
Explanation:
Water is the best product to use to thin or clean up latex paint. Latex paint is water-based, so using water to thin it or clean up any spills or brushes is the most effective and safe option. Varsal, paint thinner, and turpentine are all solvents that are typically used to thin or clean up oil-based paints, not latex paints. Using these solvents on latex paint can cause damage or produce undesirable results. Therefore, water is the recommended choice for thinning or cleaning up latex paint.
14.

Low voltage means:

Answer: Less than 30 volts (usually 24)
Explanation:
Low voltage typically means less than 30 volts, often around 24 volts. Low voltage systems are commonly used for control circuits in HVAC, security systems, and doorbells, as they are safer and require less insulation than higher voltage systems. These systems reduce the risk of electrical shock and are easier to work with. Understanding the definition and applications of low voltage is essential for safely managing and troubleshooting various electrical systems.
15.

When wiring a new wall receptacle, the silver screw is for:

Answer: Neutrel Wire
Explanation:
When wiring a new wall receptacle, the silver screw is for the neutral wire. The neutral wire, typically white, completes the electrical circuit by carrying current back to the electrical panel. The brass screw is for the hot wire, which carries the electrical current from the power source to the outlet. The green screw is for the ground wire, which provides a safe path for electricity in case of a short circuit. Correctly identifying and connecting these wires is crucial for ensuring safe and functional electrical installations.
16.

What is a swagging tool used for?

Answer: Enlarging copper tubing
Explanation:
A swagging tool is used for enlarging copper tubing. This tool is specifically designed to expand the diameter of copper tubing, allowing for a better fit and connection between pipes or fittings. It is commonly used in plumbing and HVAC systems to create a tight seal and prevent leaks. Swagging tools are not used for connecting PVC pipe joints or joining electrical wires.
17.

What is one purpose of shutoff valves on the compressor during installation and when servicing?

Answer: Too allow the freon to be saved while servicing the unit
Explanation:
Shutoff valves on the compressor during installation and servicing allow the freon to be saved. By shutting off the valves, the flow of freon can be stopped, preventing any loss or leakage of the refrigerant during maintenance or repair work. This helps in conserving the freon and ensuring its availability for future use.
18.

The pilot light on a standing pilot water heater won't stay lit. What might be causing the problem?

Answer: The thermocouple
Explanation:
The thermocouple is a device that senses the heat from the pilot light and generates a small electric current to keep the gas valve open. If the thermocouple is faulty or not positioned correctly, it may not be generating enough current to keep the gas valve open, causing the pilot light to go out.
19.

How many BTUs are in a ton?

Answer: 12000
Explanation:
A BTU (British Thermal Unit) is a unit of energy commonly used in the heating and cooling industry. A ton is a unit of measurement used to quantify the cooling capacity of an air conditioning system. In this context, a ton refers to the amount of heat energy needed to melt one ton of ice in a 24-hour period. It is equal to 12,000 BTUs per hour, which means that the correct answer is 12,000.
20.

When working on a defective breaker, what is the first thing you should do?

Answer: Turn off the main line breaker
Explanation:
The first thing you should do when working on a defective breaker is to turn off the main line breaker. This is important to ensure your safety and prevent any potential electrical accidents. By turning off the main line breaker, you are cutting off the power supply to the entire electrical system, including the defective breaker. This allows you to work on the breaker without the risk of electrical shock or other hazards. Removing the breaker or shutting it off alone may not be sufficient to ensure your safety, as there may still be live electricity flowing through the system.
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