Tasteless, colorless, and odorless
Tasteless, volumeless and odorless
Tasteless, colorless, and Weightless
Volumesless, weightless and colorless
Brown and orange
blue and yellow
Green and white
Black and red
Is usable below 10,000 feet
Is usable only above 20,000 feet
Delivers oxygen at varying pressures
16 man-minutes of oxygen
93 percent oxygen-enriched gas.
97 percent nitrogen-enriched gas.
100 percent oxygen-enriched gas.
600 to 1
680 to 1
800 to 1
860 to 1
Slow pressure buildup
Rapid venting of system pressure
LOX system pressure loss during maintenance
The filler access door from closing in the vent position
Ambient pressure and ambient temperature.
Engine throttle setting and ambient altitude.
Ambient pressure and engine throttle setting.
Engine throttle setting and ambient temperature.
Prevent the loss of compressed bleed air.
Maintain balanced airflow from each engine.
Provide a primary source for compressed bleed air.
Reduce bleed air pressure when the pressure is too high.
Ball peen hammer.
Fiber and fiberglass
Fiberglass and neoprene, or rubber
A soft aluminum, or fiber and metal mesh.
A soft aluminum, and fiber reinforced rubber or plastic.
Ram air ducting.
A long run of ducting.
A short run of ducting.
Engine bleed air.
Primary heat exchanger.
Air cycle machine.
Air cycle machine.
Refrigeration bypass valve.
Movable inlet and exit doors
Primary ram air controller assemblies.
The air pressure to increase.
Moisture to condense in the form of fog.
Ice to form in the secondary heat exchanger.
A loss of pressure as it exits the air cycle machine compressor.
Primary heat exchanger.
Secondary heat exchanger
Air cycle machine bypass valve.
Air cycle machine expansion turbine.
A jet pump.
Filtering cabin air.
The unpressurized range.
Regulating control chamber pressure.
A spring, metering valve, aneroid.
An aneroid, rocker arm, and fulcrum.
A rocker arm, fulcrum, and diaphragm.
A diaphragm, spring, and metering valve.
A diaphragm, fulcrum, and aneroid.
A rocker arm, diaphragm, and fulcrum.
An aneroid, spring, and metering valve.
A spring, metering valve, and rocker arm.
The outflow valves.
A manual controller
The cabin altitude selector.
A positive pressure relief valve.
Control the venting of cabin pressure.
Control the reference chamber pressure
Ensure that both outflow valves operate at the same time.
Ensure that the aneroid and diaphragm inlet ports remain open.
Safety valve fails.
Outflow valve fails.
Pneumatic relay fails.
Cabin pressure controller fails.
Each other only.
The power source and with the warning light.
Each other and in parallel with the power source.
The warning light and parallel with each other.
An electroconductive sensor
An Iron Fireman switch.
A photoconductive cell.
A FENWAL® switch.
Releasing a fine mist vapor.
Excluding oxygen from the area.
Removing nitrogen from the area.
Dispersing a large amount of liquid.
Convert the liquid to a gas upon discharge.
Expel the agent from the bottle.
Assist in extinguishing the fire.
Stabilize the temperature.
Rubber O-ring packing.
Break cleanly into small pieces.
Allow undisturbed fluid flow through the system.
Enable the pieces to pass easily through the strainer
Prevent small pieces from passing through the strainer.
Sump and drain.
Pump and drain.
Pressure relief valve.
Fuel-level control valve
Soft, malleable plastic.
Rubber or nylon material.
Hardened, pre-formed plastic.
Lightweight, pre-formed aluminum.
Bladder-type tanks that conform to the vacant cavity within the wing.
Lightweight, aluminum tanks inserted into empty wing cavities
Sealed-off parts of the wing structure
Soft, malleable plastic tanks.
For boost, transfer, or air refueling operations
In any area requiring a pump with no moving parts.
To scavenge the remaining fuel in low areas of a fuel tank.
When the output volume of the pump must be in direct proportion to its speed.
Top-mounted centrifugal pump with variable-speed hydraulic drive.
Centrifugal pump with electrically driven, direct current (DC), series-wound motor.
An inlet screen.
An impeller screen.
A one-way check valve
A two-way check valve.
Vapor relief valve
Direction of free flow.
Direction of restricted flow.
Location of the drilled hole in the valve.
Location of the manufacturer’s data block.
When a reverse flow of fuel is desired.
To prevent the pump from overspeeding
When gravity flow through the valve is undesirable.
To prevent excessive pressures when the pump overspeeds
One-way check valves.
Spring-loaded relief valves.
Without draining the fuel lines or tanks.
Only if the electric motor is in the OFF position.
Only after the required fuel lines and tanks are drained.
Only after removing the valve body and connecting lines.
Primary seal sleeve.
Secondary seal sleeve.
There will be a double safety factor.
Two tanks can be filled at the same time.
The tank can be filled to either of two levels.
There is capability to fill or empty the tank.
All of the above.
Signals from the amplifier.
The movement of a float in the tanks.
Voltage changes in the indicator circuit.
The amount of bleed air pressure applied to the tank.
Fuel-level control valve.
Low-level shutoff valve.
Pressure/vacuum relief valve.
Positive and negative fuel-flow.
Negative fuel-flow under all conditions.
Positive fuel-flow under positive conditions.
Positive and reliable fuel-flow under all conditions.
Rotary plug, disc, and check
Disc, check, and sliding gate.
Sliding gate, rotary plug, and disc.
Check, sliding gate, and rotary plug.
Air pressure, and pump
Check, and air pressure.
Pump, and hydromechanical.
Hydromechanical, and air pressure.
Move fuel from tank to tank.
Pressurize the fuel for transfer.
Remove residual fuel from manifolds.
Prevent fuel tank rupture or collapse.
Hydraulically, but controlled electrically.
Electrically, but controlled hydraulically.
Electrically, but controlled pneumatically
Hydraulically but controlled pneumatically
Fuel to air ratio.
Sand or dust
Aluminum or magnesium compounds.
How much fuel is being wasted.
The type of contaminant that is in the fuel.
Whether or not they constitute a flight safety hazard
Whether or not they constitute an environmental hazard.
Major and minor.
Class 1 through 5.
Class A through D.
Internal and external.
DD Form 2026.
AFTO Form 422.
AFTO Form 427.
AFTO Form 781J.
Fuel type and location
Leak category and location
Leak category and fuel type.
Location and corrective action.
Newton’s First Law of Motion.
Newton’s Second Law of Motion.
Newton’s Third Law of Motion.
Pressurizing and dump (P&D) valve.
50 percent is used for accessories.
60 percent is used for accessories.
The energy returns to the compressor
The energy operates the anti-ice system.
Results in pressure fluctuations.
Has minimum effect on pressure.
Low velocity at all times.
Less velocity exiting than entering.
Equal velocity entering and exiting.
Greater velocity exiting than entering.
It is in effect a turbo-supercharger
The internal engine nozzles are called jets.
It uses a turbine-type compressor to maintain power.
It uses a exhaust-gas-driven turbine wheel to drive its compressor.
Axial-flow and radial.
Centrifugal and radial.
Axial-flow and divergent
Centrifugal and axial-flow.
Radial and tangential forces
Rotational and tangential forces.
Rotational and centrifugal forces.
Mr. Harold Ballstein
Add thrust and decrease efficiency
Add air to the engine and decrease efficiency.
Increase thrust and engine rotations per minute (RPM).
Increase thrust and send air through the compressor core rotor.
60 and 70 percent.
65 and 75 percent.
75 and 95 percent.
95 and 100 percent.
Splitting the electrode on the plug.
Directing air around the plug electrode.
Applying gold plating to the plug electrode.
Applying ceramic coating on the plug electrode.
Interlocking stainless steel bands.
The inner and outer diffuser case.
A forged steel casing.
Solid sheet metal.
Drained overboard by a drain system.
Returned to the fuel control by tubes
Burned on the next start attempt.
Allowed to evaporate.
Shrouded, unshrouded, and fir tree.
Shrouded, unshrouded, and corrugated.
Impulse, reaction, and reaction-impulse.
Impeller, impulse, and reaction-impulse.
Swirl exhaust gas-flow
Equalize exhaust gas-flow.
Modulate exhaust gas-flow.
Straighten exhaust gas-flow.
Generate the proper fuel pressure for all ranges of engine operation.
Prevent hot starts, overtemperatures, engine overspeeding, and flameouts.
Propel the right amount of fuel to the fuel nozzles for correct combustion at all times.
Meter the fuel, making certain that the engine gets the correct quantity for combustion at all times
Heat the fuel and cool the oil.
Cool the fuel and cool the oil.
Heat the fuel and heat the oil.
cool the fuel and heat the oil.
1/25 of an inch
1/25 of an inch
1/2,500 of an inch.
1/25,000 of an inch.
Is usually mounted on the engine accessory drive.
Uses a starter-clutch assembly to disengage the starter from the engine.
Has the advantages of less weight and fewer moving parts than other starters.
Requires high-pressure, low-volume air flow to produce torque necessary for engine start.
A power takeoff (PTO) shaft.
A single-entry air diverter.
An overrunning clutch.
Power takeoff (PTO) shaft.
Single-entry air diverter.
Vibrator, alternating current (AC)-to-DC converter, and transformer.
Transformer, igniter plugs, and AC-to-DC converter.
Vibrator, igniter plugs, and AC-to-DC converter.
Vibrator, igniter plugs, and transformer
Minimum rotations per minute (RPM).
Available thrust output.
British thermal units (BTU) per hour.
Pounds per square inch (PSI).
Recycling of used oil.
Production of wear metals.
Increased equipment availability.
Increased length of time between oil changes
More oil sampling
More engine removals.
Less unnecessary maintenance.
Less wear metal found in the oil.
Goggles and gloves.
Gloves and long sleeves.
Goggles and long sleeves.
A decrease in carbon.
An increase in silicon.
A decrease in graphite.
An increase in synthetic oils.
DD Form 988.
DD Form 2026.
AFTO Form 244.
AFTO 781 series forms.