Pressurisation

Question 1

Selecting DUMP on the pressurisation control panel will result in what ?

Answer 1

The normal outflow valves opening fully.

Question 2

How many normal outflow valves are located on the 200 ?

Answer 2

1

Question 3

If the Cab alt setting on the overhead pressurisation control panel is lower than the destination elevation, what will happen to the cabin on touchdown ?

Answer 3

The cabin will be pressurised at touchdown

Question 4

When does the CABIN PRESS warming light illuminate ?

Answer 4

Cabin altitude exceeds 10,000ft

Question 5

A successful cabin pressure controller test is indicated by what ?

Answer 5

The amber FAULT light illuminating for two seconds, then extinguishes

Question 6

With the RATE knob on the pressurisation control panel set to the index mark/ detent position, what are the normal rates of cabin climb and descents that can be expected ?

Answer 6

500 fpm climb, 300 fpm descent

Question 7

Selecting MANUAL on the pressurisation control panel will cause ?

Answer 7

The normal outflow valves to close.

Question 8

Maximum cabin ROC and ROD?

Answer 8

2500 +/- 150 fpm ROC

1500 +/- 150 fpm ROD

Question 9

The normal outflow valves are modulated by which of the following means ?

Answer 9

Metered suction provided by de ice pressure against spring pressure.

Question 10

For fully automatic operation, which of the following pressurisation control panel selections is accurate?

Answer 10

Mode selectors to AUTO/NORM, Cab alt display set to destination elevation.

Question 11

If the cab alt setting on the overhead pressurisation control panel is higher than the destination elevation, what will occur at touchdown ?

Answer 11

The cabin will be fully depressurised prior to touchdown.

Question 12

Maximum pressure differential is what ?

Answer 12

5.95 psi

Question 13

What are the four pressurisation modes ?

Answer 13

Fully automatic, semi automatic, manual and dump

Question 14

Positioning the FWD OUTFLOW VALVE lever to OPEN performs what function ?

Answer 14

Admits unmetered suction past the manual metering valve to fully open the safety outflow valve.

Question 15

During normal operations the cabin pressure controller functions to keep the cabin pressure differential to a maximum of what ?

Answer 15

5.5+/- 0.3psi

Question 16

How many outflow valves are installed in the 300 ?

Answer 16

3

Question 17

The maximum cabin pressure differential permitted for takeoff or landing is what ?

Answer 17

0.5 psi

Question 18

Where is the safety outflow valve located ?

Answer 18

Forward pressure bulkhead

Question 19

If the aircraft lands and is still pressurised what will occur ?

Answer 19

The cabin will depressurise at a rate of 600fpm for one minute then the normal outflow valves will fully open.

Question 20

The cabin pressure controller modulates the normal outflow valves how ?

Answer 20

Electrical signal to the metering valve to vary the amount of suction pressure acting on the poppet valve

Question 21

Where are the normal outflow valves located ?

Answer 21

Rear pressure bulkhead.

Question 22

The pressurisation system
regulates cabin pressure
by ?

Answer 22

metering excess
conditioned air overboard
through outflow valves

Question 23

In the automatic modes,
the Cabin Pressure
Controller receives inputs
From ?

Answer 23

• Cabin pressure sensor
• Ambient pressure
  sensors
• Weight on wheel
  switches
• Power lever position
• Cabin Altitude Selector

Question 24

A third valve, the forward

safety outflow valve uses what for its suction ?

Answer 24

Slipstream air

Question 25

When on the ground with power levers retarded, the cabin pressure controller is in ground mode and holds ?

Answer 25

the normal outflow valves open to prevent pressurisation.

Question 26

When the power levers are advanced for take-off the normal outflow valves are positioned so as to ?

Answer 26

``` pressurise the aircraft to 140 feet below ambient. This is done to move the outflow valves off their full open stops and start modulating. ```

Question 27

At lift-off, the proximity switch electronics unit (PSEU) switches the cabin pressure controller to ?

Answer 27

to its normal pressurisation | scheduling program.

Question 28

The semi automatic operation is for major corrections in pressurisation due to ?

Answer 28

due to diversions, steep descents | and abnormal flight profiles.

Question 29

Adjusting the pressurisation knob fully counter- clockwise will ?

Answer 29

decrease cabin rate of | climb and descent to zero.

Question 30

Both the normal and safety outflow valves contain pressure relief valves Which ?

Answer 30

which vent excess pressure should cabin pressure exceed the sensed ambient air pressure by 5.8psi +/- 0.15.

Question 31

Protection from negative pressure is | provided by ?

Answer 31

relief valves in the normal outflow valves which automatically open if the interior suction exceeds 0.1 psi.