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AT 354 > Pressurization > Flashcards

Pressurization Flashcards

1
Q

temperature control in auto

A

65F to 88f

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2
Q

temperature control in manual

A

6C to 116C
becomes toggle switch between cool and hot

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3
Q

where are the main air valves

A

above FO

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4
Q

times for main air valves to open

A

1 takes 20 seconds to fully open

#2 waits 30 seconds then opens

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5
Q

MAIN AIR VALVE 1/2

A

indicated main bleed air valve is not in selected position

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6
Q

MAIN AIR VALVE 1/2 Ground

A

valve is open while on ground

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7
Q

main air valve and bleed air limit

A

only on together for 1 minute

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8
Q

LP on

A

only source of bleed air will be low pressure

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9
Q

LP only

A

90% of the time
80 psi
140C

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10
Q

LP and HP

A

uses HP if needed
1% of the time
310C
120 PSI

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11
Q

HP air OVHT

A

mix valve likely failed

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12
Q

how is pressure controlled

A

by amount of air let out of cabin

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13
Q

FL 410 has a cabin pressure of

A

7500, 8.55 psid

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14
Q

Max cabin differential

A

8.55 psid

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15
Q

max negative pressure

A

-0.5

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16
Q

max over pressure

A

8.6 - 8.8

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17
Q

cabin triple indicator

A

pointer - cabin altitude
PSID - shows differential
VSI - for cabin, want 500ft/min

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18
Q

rate knob for cabin

A

changes cabin VSI

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19
Q

outer ring

A

CABIN alt
set at field elevation +400

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20
Q

Main air VLV

A

electrically actuated

21
Q

MAIN AIR VLV Close

A

MAV and HP valve both closed

22
Q

MAIN AIR VLV LP ON

A

MAV open, HP valve closed

23
Q

MAIN AIR VLV OPEN

A

MAV open, HP valve armed

24
Q

main air valve limitation

A

must be closed before takeoff and landing
during single-engine operations in icing LP ON must be on on operating engine

25
Q

cabin flood switch

A

opens valve for temp controlled air to enter cabin in right rear at roof level

26
Q

cabin fan switch

A

electrically operated air to individual outlets

27
Q

cabin floor switch

A

opens valve to allow temp controlled air to enter floor outlet ducts

28
Q

What does bleed air supply to

A

Air conditioning
Rudder bias
Pressurization
Hydraulics
Engine anti-ice

29
Q

The HP bleed air supplements the LP bleed air at the mixing valve when both main air valve switches are selected to OPEN and

A

LP bleed-air pressure drops to 27 psi

30
Q

Prior to takeoff and landing, ensure that the flight deck valve and the main air valves are set to the ____ position

A

CLOSE

31
Q

this occurs when a main air valve switch is moved from the CLOSE position to the LP ON position

A

the main air valve opens, but HP air augmentation is not allowed

32
Q

the position of the MAIN AIR VLV 1 or 2 switch in which electrical power is applied to a pressure switch is

A

OPEN

33
Q

When placed in the “open” circuit, the No 1 MAV has a time delay of approximately _____ before it reaches the fully open position

A

20 seconds

34
Q

Which component in the air conditioning system determines the temperature of the air after entering the water separator

A

low limit temperature control

35
Q

When the duct temperature limiter senses a duct temperature of 116

A

the limiter illuminates the DUCt OVHT annunciator and automatically gives reduction in duct temperature

36
Q

Cabin delivery air temperature is controlled by the operation of the

A

Cabin temp control valve

37
Q

a pressure switch downstream of the PRSOV protects the ACM from overspeed if pressure rises above

A

40psi

38
Q

when too much air pressure is present the 40-psi pressure switch protects the ACM from overspeed by closing

A

the No 2 main air valve

39
Q

the switch that controls the auxiliary heating valve to provide additional heating to the cockpit is the

A

F/DK VLV switch

40
Q

The ____ bus powers the CABIN TEMP-MANUAL mode

A

PE

41
Q

pressurization system is capable of maintaining a cabin altitude of 7500 feet when the airplane altitude is

A

41,000 feet

42
Q

the pressurization system can maintain a maximum cabin differential pressure of

A

8.55psi

43
Q

the maximum allowable negative cabin differential pressure is

A

.5

44
Q

the fan-operated Venturi provides suction to open

A

both outflow valves

45
Q

with the CABIN HIGH DATUM not selected, the CABIN ALTITUDE warning annunciator illuminates and the warning horn sounds at ____ feet

A

9,300 +/- 300

46
Q

what is the ACM

A

air cycle machine
cools bleed air to send to flight deck and cabin

47
Q

Cabin triple indicator

A

pointer - cabin altitude
stripe indicator - VSI for cabin
white indicator - PSID

48
Q

how should the rate knob be set

A

outer ring +400 field elevation when landing
inner ring cruise +200 feet in flight

49
Q

what does the butterfly valve do

A

allows air to go out
clears smoke
depressurizes cabin

AT 354 (12 decks)

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