Answer:D. Oxygen is used for respiration and carbon dioxide is a waste product.
Both animal and plant cells use oxygen for respiration, which is the process of converting nutrients into energy. During respiration, oxygen is consumed and carbon dioxide is produced as a waste product. In plant cells, photosynthesis also occurs, which is the process of using sunlight, carbon dioxide, and water to create glucose and oxygen. But respiration, consuming oxygen and producing carbon dioxide, is a common process that happens in both animal and plant cells.
Explanation:
Eve's contractor recommended she not install baseboard heating. In which scenario would it be disadvantageous to install a baseboard heating system?
A. Where electricity is generated from a gas-fired plant.
B. Where there is high room air circulation.
C. Where there are low ceiling heights.
D. Where the TD is zero
Note that where Eve's contractor recommended she not install baseboard heating. The scenario where would it be disadvantageous to install a baseboard heating system is: "Where there are low ceiling heights." (Option C)
What is a Baseboard Heating?The term "baseboard heat" refers to the position of the heater along the bottom of the wall. The idea behind this placement is that heat naturally rises, so by beginning along the floor, the heat gradually rises into the area between the floor and ceiling where you spend the majority of your time.
Baseboard heating systems, which are typically installed along the base of the walls, heat a room by relying on the natural rise of warm air. If the ceiling height is low, warm air may not have enough space to rise, resulting in poor heating performance and decreased efficiency.
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Anna is very picky about the temperature in her home and wants full control of air flow and heat/cooling. She should install a system that includes
A. floating control.
B. an automated mixing chamber.
C. two-position control.
D. a low differential.
Where Anna is very picky about the temperature in her home and wants full control of airflow and heat/cooling. She should install a system that includes: "a low differential" (Option D)
What is a Low Differential?The temperature differential in HVAC terms refers to the temperature difference between the inside and outside areas of the house.
The thermostat has an adjustable temperature differential setting that determines how frequently your system cycles. The lower the differential setting, the more frequently your system will cycle and the tighter the temperature will be maintained.
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An air-conditioning system's automatic controller might directly control the
A. conversion of pneumatic energy to hydraulic signal pressure.
B. thermostat's setpoint temperature.
C. motor of a large condenser fan.
D. sensitivity of the ladder logic.
Note that an air-conditioning system's automatic controller might directly control the: "motor of a large condenser fan" (Option C)
What is a Condenser Fan?A condenser fan is a type of fan that is found near the condenser, as the name implies. Its purpose is to remove heat from the refrigerant inside the hollow passages of the condenser. When your air conditioner is turned on, the refrigerant at the evaporator coil absorbs heat from the inside of your home.
The automatic controller of an air-conditioning system is a device that controls the operation of the air-conditioning system. It has the ability to directly control the motor of the large condenser fan. This motor is in charge of blowing air over the condenser coils, which aids in the dissipation of heat absorbed by the refrigerant.
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10. Technician A says to make the finish cut at the slowest speed when machining brake drums. Technician B says that the drum should not exceed its discard diameter. Who is correct?
When milling, technician A advises using the slowest speed for the end cut. According to technician B, the drum shouldn't be larger than its disposal diameter.
What is the process of milling?
Cleaning, grading, breaking down, sizing, separating, or classifying dry bulk materials are all included in the term "milling process." The mill is used in the actual milling process to grind, cut, or crush solid bulk materials into smaller bits. Ingilling is the practise of using a specialised machine to grind, cut, press, or crush a material. Cutting away material with a spinning cutter that has several teeth is called milling.
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Martavis is installing a smart thermostat into a home built in the 1950s. The home still has the original steam boiler as its heat source and currently is set using the original dial thermostat. After connecting all of the old wires to the smart thermostat, Martavis notices that it doesn't turn on. What is the most likely issue with the installation?
A. The new smart thermostat is defective.
B. There's no C wire since the original thermostat is older.
C. There's no R wire since the home doesn't have a central air system.
D. The new smart thermostat isn't compatible with this type of boiler.
Where Martavis is installing a smart thermostat into a home built in the 1950s. The home still has the original steam boiler as its heat source and currently is set using the original dial thermostat. After connecting all of the old wires to the smart thermostat, Martavis notices that it doesn't turn on. Note that he most likely issue with the installation is: "There's no C wire since the original thermostat is older." (Option B)
What is a Smart Thermostat?Smart thermostats are Wi-Fi thermostats that can be used with home automation to control the heating, ventilation, and air conditioning in a home.
The most likely problem with installing a smart thermostat in a 1950s home is that the original thermostat does not have a "C" wire, which is typically used to provide a common power source to the thermostat. Smart thermostats require a "C" wire for power and will not function if the home does not have one.
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