Pneumatics

Question 1

The OFF position of the air conditioning master switch closes all valves in the system except the _____

Answer 1

Alternate pressurization valve

Question 2

The airplane altitude Differential Pressure Scale on the cabin pressure controller shows the _____

Answer 2

Maximum actual airplane altitude for the commanded cabin altitudes selected by the dial pointer at an 8.6 psi pressure differential

Question 3

The door over the cabin pressure test valve handle was designed to close only when the handle is in the ______ position

Answer 3

Normal

Question 4

The function of the bleed air crossover valve is to _____

Answer 4

Isolate the wing manifold into two sections

Question 5

The cargo compartment temperature control switch controls the position of the alternate pressurization valve except when operated from the cockpit by setting _____

Answer 5

The left alternate pressurization switch to ON

Question 6

The cabin manual pressure control knob can be used to depressurize the aircraft by rotating it _______ to the ______ position

Answer 6

Counterclockwise, full Decrease

Question 7

The recommended maximum cabin altitude to maintain conditions for efficient crew operation is _______ feet for day and ______ feet for night

Answer 7

8000, 5000

Question 8

The purpose of ground air ejector is to ________

Answer 8

Move ambient air through the heat exchangers for cooling during ground operations

Question 9

The cabin temperature control knob is operative only when the air conditioning master switch is in _____

Answer 9

COND AIR

Question 10

The alternate pressurization valve requires approximately ______ seconds to move from full open to full closed

Answer 10

20

Question 11

When rotating the cabin altitude controller knob CCW, do not attempt to force the pointer beyond the internal stop at approximately ____

Answer 11

Minus 7000 ft

Question 12

The manual position of the cabin temperature control rotary switch controls the position of the ______ to increase or decrease cabin temperature

Answer 12

Hot air bypass valve

Question 13

The cargo compartment temperature regulator controls the position of the ______ valve when the air conditioning master switch is in the ______ position

Answer 13

Alternate pressurization, COND AIR or OFF

Question 14

The ________ position of the cabin pressure test valve handle locks out the cabin pressure controller so all control of cabin pressure is through the manual pressure controller

Answer 14

Closed

Question 15

When operating for extended periods at altitudes of 20,000 feet or below, the recommended cabin altitude for normal climb and cruise is ____

Answer 15

Field PA plus 500 ft

Question 16

It is important not to operate the air conditioning system with right alternate pressure switch in ______ for an extended period of time. Distribution ducts will be exposed to high temperature bleed air and _____

Answer 16

Full INCREASE, Overheat

Question 17

The _____ of the cabin altitude gage indicates actual cabin altitude while the ______ indicates the cabin differential pressure

Answer 17

inner scale, outer scale

Question 18

During ground operation with the air conditioning master switch in COND AIR, the crossover valve CLOSED and engines #1 & #2 not running, the _____

Answer 18

Air cycle machine will overheat from the lack of cooling though the heat exchangers.

Question 19

The OVHD PANEL caution light automatically comes on when _____ comes on

Answer 19

Any overpressure, over temp, or leak detect

Question 20

When the bleed air crossover valve is closed, bleed air from engines #1 & #2 is prevented from reaching the ____

Answer 20

Air conditioning system

Question 21

When the bleed air crossover valve is closed, bleed air from engine #3 & #4 is prevented from reaching the ____

Answer 21

Alternate pressurization valve and ground ejector

Question 22

Cabin temperature is maintained by mixing hot bleed air and cold air based on cabin control temperature selector setting. This is done either by automatic or manual control of the ________ valve

Answer 22

Hot air bypass

Question 23

The ON position of the left alternate pressurization switch bypasses the ____ and allows the use of the right alternate pressurization switch to control the position of the ________valve

Answer 23

Cargo compartment temperature regulator, alternate pressurization

Question 24

When does the CABIN PRESS light illuminate

Answer 24

12,000 feet (+/- 1,000ft)

Question 25

Air supplied by at least _____ ground carts is required before air conditioning system can be used to provide cooling air on the ground. Insufficient airflow will cause the ACM to _______.

Answer 25

2, Overheat and result in internal damage

Question 26

The ______ will automatically close due to an overpressure condition

Answer 26

Engine bleed valve

Question 27

When the LEAK DET light comes on it means temperature where is high?

Answer 27

Temperature in the engine strut is to high

Question 28

When the air conditioning master switch is in the COND AIR or OFF position, the cargo compartment temperature regulator controls the position of the ______ valve

Answer 28

Alternate pressurization

Question 29

Each engine has a set of 3 amber caution lights on the air conditioning control panel, labeled LEAK DET, OVER PRESS, and ____

Answer 29

OVER TEMP

Question 30

Why do we use RAM AIR position of the master switch to start engines?

Answer 30

Ensures all available air goes to the starter

Question 31

If the airplane fails to pressurize, the air vents near the ____ are convenient places to check for airflow in the control cabin

Answer 31

Sextant mount

Question 32

If the airplane fails to pressurize as desired, carefully consider the possibility of physiological consequences at cabin altitudes above ____ feet

Answer 32

18,000

Question 33

Airflow into the aircraft from the alternate pressurization valve is felt sooner in the _____ and the ___

Answer 33

Aft cargo compartment, Boom operator’s compartment

Question 34

The cabin pressure controller is used in conjunction with the _____ to automatically control the cabin pressure

Answer 34

Outflow valves

Question 35

The control cabin TEMPERATURE CONTROL knob only works when the MASTER switch is in the ______ position

Answer 35

COND AIR

Question 36

What cabin pressure controller components are controlled by the CABIN ALT knob

Answer 36

Cabin altitude pointer / Upper and Lower halves of the Airplane Altitude/Differential Pressure Scale

Question 37

Moving the MASTER switch to the RAM AIR position closes the _________, ______________ and _________ valves, and opens the __________ valve

Answer 37

air conditioning shutoff, alternate pressurization, ground air ejector; ram air

Question 38

Three __________ valves, one in each wheel well, regulate cabin pressure and prevent overpressurization

Answer 38

outflow

Question 39

While it’s in the primary and secondary heat exchangers, the bleed air is cooled by __________

Answer 39

RAM AIR

Question 40

If the cabin pressure controller fails, use the _____________ to maintain cabin pressure

Answer 40

MANUAL PRESSURE CONTROLLER knob

Question 41

Immediately before landing, what must you do if the crossover valve and engine bleed valves 1 and 2 are closed to prevent overheating?

Answer 41

Move the MASTER switch to the OFF position

Question 42

The CBN PRS warning light illuminates if cabin altitude is approximately _________ feet; it turns off by the time you descend to ____________ feet

Answer 42

12,000 ; 9,500