2011 Cqt-air Conditioning And Pressurization

Pressurization can be maintained with only one bleed source available because the bleed source is responsible for supplying compressed air to the aircraft's cabin. Even with just one source, the air can still be distributed and regulated to maintain the desired cabin pressure. However, having multiple bleed sources provides redundancy and increases the reliability of the pressurization system.

The cargo area is pressurized. This means that the air pressure within the cargo area is regulated and kept at a level similar to that of the passenger cabin. This is important to ensure the safety and well-being of any live cargo or sensitive goods that may be transported in the aircraft's cargo area. By maintaining a pressurized environment, the risk of damage to cargo or harm to any living beings is minimized during flight.

Yes, the crew can select the cabin temperature in the "manual" mode while the flight compartment temperature controller is in the auto mode. This means that even though the flight compartment temperature is being controlled automatically, the crew still has the ability to manually adjust the temperature in the cabin.

Both outflow valves are capable of automatic pressure relief at 5.8 +/- .15 PSI.

Upon touchdown, the rear outflow valve opens. This is because during landing, the aircraft's speed decreases rapidly, causing an increase in air pressure inside the cabin. To equalize this pressure with the outside air pressure, the rear outflow valve opens, allowing excess air to escape from the cabin. Opening the rear outflow valve helps maintain a safe and comfortable cabin environment for the passengers and crew.

When the aircraft is on the ground with engines running and bleeds on, the rear outflow valve is open. This allows for the controlled release of cabin air pressure and helps maintain a comfortable cabin environment. By keeping the valve open, fresh air can enter the cabin, while stale air and any fumes or contaminants can be expelled. This helps ensure proper ventilation and air circulation within the aircraft while on the ground.

The correct answer is 8000. When flying at FL 250, the cabin altitude should be set at 8000 feet. This is because FL 250 represents a flight level of 25,000 feet, and the cabin altitude should typically be maintained at a level that is lower than the actual altitude to ensure the comfort and safety of the passengers and crew.

The answer is "No" because in order for an aircraft to pressurize, the bleeds need to be on. The bleeds are responsible for supplying the necessary air pressure to the cabin. If the bleeds are off, there will be no source of pressurized air and therefore the aircraft will not be able to pressurize.

When the pressurization toggle switch is selected to the "auto" position, the rear outflow valve is controlled by the pressurization computer. This means that the computer will automatically adjust the position of the rear outflow valve to maintain the desired cabin pressure in the aircraft. The computer continuously monitors the cabin pressure and adjusts the valve accordingly to ensure a comfortable and safe environment for the passengers and crew.

The Flight Compartment Fan (pre mod 8/1538) cannot be switched on in flight.

The CABIN PRESS warning light indicates that the cabin altitude has exceeded 10,000 ft. This means that the pressure inside the cabin is higher than the recommended level, which can be dangerous for passengers and crew. It is important to address this issue promptly to ensure the safety and comfort of everyone on board.

Turning the manual increase knob counterclockwise will decrease the cabin altitude when controlling pressurization manually. This is because counterclockwise rotation of the knob will reduce the flow of air into the cabin, resulting in a decrease in cabin altitude.

The cabin rate of change when the rate knob is at the index is 500 fpm up and 300 fpm down.

To change from fully automatic mode to semi-automatic mode for the pressurization system, the correct answer is to switch the Cab Set/Norm switch to Cab Set. This switch allows the system to be controlled manually rather than relying on automatic settings.

When a #1 or #2 BLEED HOT caution light illuminates, it indicates that the bleed air system for the respective engine is overheating. In response to this warning, the bleed air valve for that engine is shut off. This action helps to prevent further damage and potential hazards caused by the overheating. Therefore, the correct answer is "That bleed is shut off."

The "fault" light on the pressurization panel indicates that the Pressurization Computer is experiencing a fault or conducting a self-test. This means that there is a problem with the pressurization system or the computer itself, which may require attention or troubleshooting. It is not related to a faulty outflow valve or Air Data Computer.

The correct answer states that both the forward outflow selector and the manual increase knob open the forward outflow valve. However, the manual increase knob allows for a modulated opening, meaning that it can adjust the degree to which the valve is opened. This allows for more precise control over the airflow, whereas the forward outflow selector may only have a fixed opening position.

The correct answer is "All engine bleeds to the pack shut off." This means that when the ACM PACK HOT caution light is activated in a DHC-8 100, all engine bleeds are shut off to the pack. This is an automatic feature that helps prevent overheating of the air conditioning system by stopping the flow of hot air from the engines into the packs. By shutting off the engine bleeds, cooler air can be circulated within the aircraft, ensuring the safety and comfort of the passengers.

The MIN/MAX rheostat on the bleed control panel adjusts the amount of air flow to the ACM (Air Cycle Machine). This means that it controls the flow of air to the ACM, which is responsible for cooling and pressurizing the aircraft cabin. By adjusting the air flow, the rheostat helps maintain the desired temperature and pressure levels inside the cabin.

If a cooler cabin temperature is selected, the ACM pack bypass valve will close. This means that the valve will prevent the air conditioning and ventilation system from bypassing the air cycle machine (ACM). By closing the valve, the cooler air from the ACM will be directed into the cabin, helping to maintain the desired temperature.

The correct answer is Trim Valves. When the FLT COMPT DUCT HOT caution light is illuminated, the trim valves are driven to the full cool position. This action helps to regulate the temperature of the compartment duct and prevent it from overheating. The diverter valve and pack temperature control valves are not directly involved in cooling the compartment duct in this scenario.

The pressurization toggle switch does not have to be in manual for the manual increase knob to work. This means that the manual increase knob can still function even if the pressurization toggle switch is not in the manual position.

When the pressurization toggle switch is selected to the "manual" position, the rear outflow valve closes and pressurization is accomplished by modulating the forward outflow valve. This means that the pressurization computer is deactivated and the pilot manually adjusts the forward outflow valve to control the cabin pressure.

The AIR COND PACK HOT caution light indicates that excessive temperature is being sensed at the Compressor Discharge Overtemperature Sensor. This sensor is responsible for monitoring the temperature of the compressor discharge in the air conditioning system. If the temperature exceeds the safe limit, the caution light will illuminate to alert the crew of the potential issue.

The rear outflow valve is powered by both suction created by the 18 PSI de-icesystem air flowing through a venturi and the Left Main DC Power.