Pressurization Flashcards

1
Q

T/F: The aircraft’s pressurization is provided by engine bleed air.

A

TRUE

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2
Q

Which valve is primarily manipulated to control the pressurization in the cabin of the aircraft?

A

The AFT Outflow Valve

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3
Q

How many safety valves are there in addition to the Outflow Valve?

A

2 (AFT Safety Valve and FWD Safety Valve)

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4
Q

How many different modes are there on the pressurization system?

A
4 control modes
AUTO
MANUAL
EMERGENCY/SMOKE REMOVAL
PRESSURE DUMP
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5
Q

Manual mode is used on the pressurization system for what reason?

A

The AUTO mode is inoperative

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6
Q

Holding the spring-loaded toggle switch on the pressurization panel to the DECR side accomplishes what?

A

DECREASES cabin pressure by opening the AFT Outflow Valve, this INCREASES cabin altitude

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7
Q

Holding the spring-loaded toggle switch on the pressurization panel to the INCR side accomplishes what?

A

INCREASES cabin pressure by closing AFT Outflow Valve, this DECREASES cabin altitude

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8
Q

If the AFT outflow Valve becomes inoperative, pressurization can be controlled by what?

A

FWD Safety Outflow Vave

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9
Q

Lifting the safety guard and rotating the Forward Safety Outflow Valve selector knob to the open position allows the _____ to be full open during emergency operations.

A

FWD Safety Outflow Valve

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10
Q

When the pressurization system is in AUTO and the FWD Outflow Valve is rotated to the open position, it causes the AFT outflow valve to _____.

A

CLOSE

this clears smoke in the cockpit without depressurizing the aircraft

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11
Q

Which pressurization mode would be used to depressurize the aircraft most rapidly?

A

DUMP mode

maximum smoke evacuation

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12
Q

T/F: When the pressurization system is set to DUMP, the aircraft can still be pressurized.

A

FALSE, the aircraft will not pressurize because the AFT Outflow Valve is fully open

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13
Q

If bleed air is unavailable in flight, the cabin and flight compartments can be ventilated with what?

A

Outside ram air through a NACA vent on the dorsal fin

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14
Q

The ram air vents used in flight when bleed air is not available are located on which part of the aircraft?

A

The dorsal fin

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15
Q

What is the maximum pressure differential pressure permitted by the cabin pressure controller?

A

5.46 PSI

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16
Q

At 25,000 feet, what cabin altitude gives you 5.46 PSI pressure differential?

A

8,000 feet cabin altitude

17
Q

At what altitude does the cabin pressure warning light illuminate?

A

Cabin Altitude above 9,800 feet

18
Q

During automatic pre-pressurization, the cabin is pressurized how many feet below takeoff field elevation?

A

400 feet below takeoff field elevation (at a rate of -300 fpm)

19
Q

The cabin pressure controller is in the takeoff mode for no longer than how many minutes after takeoff?

A

10 minutes

20
Q

Selecting the DUMP position on the pressurization system accomplishes what?

A

Fully opens the AFT Outflow Valve

21
Q

When the pressurization mode switch is selected to the MAN position, which of the following is true?

A

Selecting INCR on the MAN DIFF switch closes the AFT Outflow Valve

22
Q

T/F: The MAN DIFF switch on the pressurization panel should be used in both AUTO and MANUAL modes of operation.

A

FALSE, the MAN DIFF switch is used in MANUAL mode only