Aopt: Cdc Vol 3 Unit 1-2 Self- Test Questions

Front 1

When should the daily inspection of the altitude chamber be accomplished?

Back 1

Before the first operation of the day, or after the last operation of the previous day.

Front 2

What maintenance record gives you the current operational status of the altitude chamber?

Back 2

AFTO Form 244s.

Front 3

When checking the electrical system, what should the reading be on the rectifier?

Back 3

28 volts DC.

Front 4

What is the last step of the electrical inspection?

Back 4

Check the rheostat on the emergency light system ensuring it dims and brightens as selected.

Front 5

What is your primary concern when performing the mechanical system inspection?

Back 5

Chamber’s ability to maintain selected altitudes.

Front 6

What type of damage to chamber windows would require its replacement?

Back 6

Nicks and chips.

Front 7

What is the normal working pressure for the chamber compressor?

Back 7

150 psi.

Front 8

When checking instruments, what is the setting for each altimeter?

Back 8

29.92 in Hg.

Front 9

What system is checked last during the daily inspection?

Back 9

Oxygen system.

Front 10

How do you purge an MA–1 portable oxygen assembly?

Back 10

Fill and drain the cylinder three times.

Front 11

When is the periodic inspection performed?

Back 11

200-hour intervals.

Front 12

What is the principle difference between the daily and periodic inspection?

Back 12

Periodic inspection is more thorough requiring additional tests of chamber subsystems.

Front 13

To what altitude and within what time limit is the chamber taken for the pressure reduction test?

Back 13

To 50,000 feet within 10 minutes.

Front 14

Describe the procedures and requirements for the altitude chamber leak test.

Back 14

Chamber is taken to 41,500 feet, all chamber valves are closed. After one hour, the chamber should not
descend below 29,000 feet.

Front 15

Which wiring on the chamber is not enclosed in conduit?

Back 15

Wiring under the operator panels.

Front 16

How do you perform the rate of climb indicator (RCI) operational inspection?

Back 16

Establish ascent rate of 1,000 fpm by 6,000 feet. Record time it takes to get from 6,000 to 7,000 feet.
Elapsed time should be 60 seconds plus or minus 12 seconds. Check the descent from 7,000 feet to 6,000
using the same time parameters.

Front 17

How often is an operational check of the rapid decompression system accomplished?

Back 17

Every seventh day the valve is idle.

Front 18

What are the three categories of chamber assembly maintenance?

Back 18

Minor, major, emergency.

Front 19

Who has the prime responsibility for major maintenance and overhaul?

Back 19

Ogden Air Logistic Center (OALC) Hill AFB, Utah.

Front 20

What term describes scheduled chamber maintenance and overhauls?

Back 20

Trainer Repair Parts Package (TRPP).

Front 21

On altitude chambers, what is the color of the vacuum and air valves respectfully?

Back 21

Vacuum valve is black; air valve is green.

Front 22

How long do the Type A and B decompressions take?

Back 22

Type A: 1 to 3 seconds; Type B: 12 to 20 seconds.

Front 23

How does the sealing and lubricating oil flow in the KT–850B and KT–850C?

Back 23

Oil flows from the reservoir directly to an oil pump on the vacuum pump shaft.

Front 24

What is the most important rule when starting and stopping the vacuum pump?

Back 24

Always used the established checklist.

Front 25

What is blank-off pressure?

Back 25

Lowest pressure the pump can attain.

Front 26

When is blank-off pressure used?

Back 26

When the pump is warming up.

Front 27

What is the purpose of the gas ballast valve?

Back 27

Introduces air into the compression side of the pump. Helps to carry water vapor and contaminants into the
air/oil separator.

Front 28

When is the gas ballast valve used?

Back 28

When warming up the pump.

Front 29

How is the V-belt tension for a new belt accomplished?

Back 29

Deflect no more than 5/8” with a force of 12 to 16 pounds.

Front 30

What are the two functions of the oil mist eliminator?

Back 30

(1) Traps or filters the vaporized oil from the exhaust before it enters the atmosphere. (2) Returns the
trapped or filtered oil to the air/oil separator through a recovery line.

Front 31

What valve allows filtered oil to return to the oil/air separator from the oil mist eliminator?

Back 31

Baffle drain valve.

Front 32

What controls the oxygen pressure to the altitude chamber?

Back 32

Oxygen manifold.

Front 33

Who is responsible for ensuring trainees and observers receive an uninterrupted oxygen supply
during a chamber flight?

Back 33

Crew chief.

Front 34

What are the three types of valves used on most oxygen systems?

Back 34

Check valve, pressure control valve, and on/off valve.

Front 35

What type of valve is used on aircraft that use more than one storage cylinder?

Back 35

Check valves.

Front 36

What is the purpose of the pressure control valve?

Back 36

To maintain oxygen pressure at a prescribed value for a specific delivery system.

Front 37

Why do the oxygen on-off valves, on the altitude chamber system, need to be manually operated?

Back 37

To enable the changing of oxygen cylinders during chamber flights.

Front 38

What type of tape is used for oxygen plumbing with an outside diameter of 3/8” and of 1/2” or
greater?

Back 38

1/4” wide Tetrafluroethylene or Teflon tape; 1/2” wide Tetrafluroethylene or Teflon tape.

Front 39

What are the specifications for low-pressure oxygen distribution lines?

Back 39

5/16” outside diameter (OD) by 0.035 wall thickness aluminum alloy.

Front 40

What are the specifications for liquid oxygen system distribution lines?

Back 40

All aluminum alloy, filler line 3/8” OD, vent line 1/2” OD, all other lines 5/16.”

Front 41

What will help to avoid equipment damage or personnel injury when setting up or shutting down
the oxygen manifold?

Back 41

Using an established checklist.

Front 42

List the six valves that should be closed on the oxygen manifold prior to opening up the highpressure
cylinders.

Back 42

Two high-pressure; two low pressure; one crossover valve; one drain valve.

Front 43

Why is it important to ensure the C–1 regulator is loosened or backed-off prior to opening any
high pressure oxygen cylinders?

Back 43

Ensures that the control valve is not depressing the diaphragm that controls line pressure.

Front 44

During normal operation, what valve on the oxygen manifold remains closed?

Back 44

The crossover valve.

Front 45

What pressures do the left and right gauges on the C–1 regulator show?

Back 45

Left Gauge - line pressure to chamber, Right gauge - cylinder pressure.

Front 46

Which bank of oxygen is used as the in-use bank?

Back 46

The bank with the lowest pressure reading.

Front 47

When setting up the oxygen system, what is the next step after turning on all of the high-pressure
oxygen cylinders?

Back 47

Adjust the C–1 regulators.

Front 48

What pressure is the in-use bank set at?

Back 48

300 psi.

Front 49

What happens when the low-pressure valves are opened?

Back 49

Oxygen is released into the lines leading to the chamber.

Front 50

At what pressure does the stand-by bank take over on the oxygen manifold?

Back 50

200 psi.

Front 51

List the procedures for shutting down the oxygen manifold.

Back 51

Close all cylinder valves; open drain valve until all oxygen is removed from lines; close all valves on
manifold; adjust the C–1 regulators to loose setting.

Front 52

What three groups is the altitude chamber intercommunication system is divided into?

Back 52

User equipment, power equipment, and fixed station equipment.

Front 53

What comprises the user equipment for the chamber communication system?

Back 53

Transmitter and receiver.

Front 54

What is the normal voltage input into the chamber power equipment?

Back 54

110 volts AC which a rectifier converts to 28 volts DC.

Front 55

How much power is supplied by the emergency battery?

Back 55

24 volts DC.

Front 56

Which intercom system is used by inside observers and outside crewmembers and provides three
separate channels for communication?

Back 56

C–824 AIC–10A.

Front 57

What channel on the intercom is useful when removing a student from the chamber during a
flight?

Back 57

LOCK.

Front 58

Which channel is only accessible by chamber crewmembers?

Back 58

OPERATOR.

Front 59

What channel on crewmember intercoms is useful when needing both hands free and still needing
to communicate with other personnel?

Back 59

HOT MIC.

Front 60

What are the three types of chamber altitude measuring instruments?

Back 60

Altimeter, absolute pressure instrument (API), rate-of-climb indicator (RCI).

Front 61

The altimeters triangular tipped pointer shows what? Short pointer? Long pointer?

Back 61

10,000s of feet, 1,000s of feet, and 100s of feet.

Front 62

What is the warning symbol at the altimeters 6 o’clock or 9 o’clock position used for?

Back 62

Low altitude.

Front 63

What is the range of pressure settings for the Kollsman dial on the altimeter?

Back 63

From 28.1 to 31.0 in Hg.

Front 64

What is the Kollsman dial set at for altitude chamber operations?

Back 64

29.92 in Hg.

Front 65

When using the absolute pressure instrument, what altitudes are read on the outer scale? The
inner scale?

Back 65

Outer circle: 0 to 18,000 feet; inner circle: 18,000 to 250,000.

Front 66

What is the best use for the absolute pressure instrument?

Back 66

To determine precise altitude when the altitude chamber is leveled.

Front 67

What instrument helps to measure the ascent and descent rates of the altitude chamber?

Back 67

8. Rate-of-climb indicator (RCI).

Front 68

How long should it take the rate-of-climb indicator to equalize after chamber ascent, descent, or
leveling off?

Back 68

7 to 12 seconds.

Front 69

What is the RCI’s range of measurement?

Back 69

0 to 12,000 fpm.