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# cdc 2A551 vol 3

### aircraft systems part II

It is important to raise the air temp in a jet engine to increast it's energy
in a jet engine, the velocity of the air is decreased by the diffuser
an acft taxiing at a constant speed is an example of newton's first law of motion
foot-pounds and inch-pounds are units of measure for work
the resistance of an object to change its motion is a property of matter called inertia
the ability to do work is the definition of energy
in a jet engine, fuel is metered for comubustion by the fuel control
the average percentage of a jet engine's energy required to maintain engine operation is 60
what effect does the divergent design of a jet engine diffuser have on pressure increases pressure
the required velocity for air and gases flowing through a jet engine is greater velocity exiting then entering
the velocity of the stream of air that flows through a jet engine reaches its highest point at the ejector nozzle
when two or more turbine wheels are used in a jet engine, what is placed directly in front of each turbine wheel nozzle diaphragm
a jet engine drives its name from the fact that it used exhaust-gas-driven turbine wheel to drive its compressor
the three major sections of all jet engines are compressor, combustion, and turbine
the condition that rapidly reduces the efficiency of a centrifugal jet engine compressor would be pressure pulsations
the type of engine that is cheaper to manufacture is the centrifugal because of fewer parts
the percentage of combustion efficiency of a gas turbine is usually between 95 and 100
the term "combustion range" is defined as a jet engine's operating temp zone
the most chemically correct ratio for burning fuel in a combination chamber is 15:1
the inner and outer surfaces of an annular-type combustion chamber are formed by interlocking stainless steel bonds
the most common type of fuel nozzle system is the pressure-atomizing
swirl-type fuel nozzles are usually used to provide what type of flame speed high
the three design types of turbines use in jet engines are impulse, reaction, and reaction-impulse
on some jet engines, the turbine bucket is secured in place by lock strips
the purpose of the exhaust duct is to straighten exhaust gas-flow
when trimming the exhaust gas temperature of some jet engines, the nozzle area is changed by mice
one common type of variable-area orifice used in an augmenters is the segmented flap
the augmenter component that creates local turbulence and reduces gas velocity is the flameholder
the hamilton standard 54H60-91 propellar is a four-bladed, reversible-pitch propeller: 13.5 feet in diameter
a method of de-icing a propellar is to use electrically heated elements
The type of fuel control that uses items such as thermocouples, relays, amplifiers, and solenoids, to help control the engine is ELECTROHYDROMECHANICAL
Pressurization of the engine fuel system is controlled by the PRESSURIZING AND DUMP (P&D) VALVE
During a visual inspection, how can you tell when a fuel filter is clogged? A DIFFERENTIAL PRESSURE INDICATOR IS ACTUATED
Classified as to structure, which of the following is not a type of an oil pump ROTOGEAR
Structurally, the most common type of oil pump in use is the GEAR
The valve that permits jet engine oil flow in only one direction is the CHECK
The oil cooler that operates on the same principle as an automotive radiator is the AIR/OIL
The purpose of an oil-temperature control valve used with air/oil coolers is to DIRECT OIL AROUND OR THROUGH THE COOLER
To create a static seal between two stationary parts in the oil system, use A GASKET
The air turbine (impingement) starter used on jet engines HAS THE ADVANTAGES OF LESS WEIGHT AND FEWER MOVING PARTS THAN OTHER STARTERS
The unit of a jet engine alternating current (AC) ignition system that develops 20,000 volts, delivered to the igniter plugs, is the TRANSFORMER
A simple direct current (DC) ignition system consists of VIBRATOR, IGNITER PLUGS, AND TRANSFORMER
An advantage of the high-energy capacitor type jet engine ignition system is it MAKES STARTING POSSIBLE WHEN THE IGNITER PLUGS ARE FOULED
Aircraft engine indicating instruments must BE LIGHT IN WEIGHT, SMALL IN SIZE, AND EASY TO READ
Exhaust gas temperature (EGT) indicators indicate the engine EGT in DEGREES CELCIUS
The three benefits of the Joint Oil Analysis Program (JOAP) are improved safety, reduced maintenance cost, and INCREASED EQUIPMENT AVAILABILITY
You should not use mouth-suction to take jet engine oil samples because THIS COULD CAUSE PARALYSIS OR DEATH
The most common contamination found in lubricant systems is DIRT AND SAND
A well-designed aircraft fuel system will ensure POSITIVE AND RELIABLE FUEL-FLOW UNDER ALL CONDITIONS
The three types of shutoff valves used in the crossfeed fuel system are the SLIDING GATE, ROTARY PLUG, AND DISC
The basic purpose of the fuel vent system is to PREVENT THE RUPTURE OR COLLAPSE OF THE FUEL TANKS
The fuel subsystem designed to minimize fuel boiling point is PRESSURIZATION
The minimum distance an aircraft should be parked from a hangar prior to a defueling operation is 50 FEET
The air-refueling (A/R) receptacle is operated HYDRAULICALLY, BUT CONTROLLED ELECTRICALLY
The output pressure and the flow ratings of centrifugal-type fuel pump are greater thanthe system needs in order to PROVIDE AN AMPLE SUPPLY OF FUEL IN CASE OF A SINGLE PUMP FAILURE
The kind of centrifugal pump is used when a fuel supple is required during periods of negative gravity condition sis A DUAL-IMPELLER
What characterisitc distinguishes the ejector-type fuel pump from other types of fuel pumps? CONTAINS NO MOVING PARTS
The arrow stamped on the body of a fuel system check valve indicates the DIRECTION OF FREE FLOW
One disadvantage of a sliding gate fuel system valve is that it CANNOT WITHSTAND EXTREME PRESSURES
The fuel system component used to prevent excessive pressure from building up in trapped lines is the SPRING-LOADED RELIEF VALVE
Another name for the disc type valve in a fuel system is BUTTERFLY
A primary function of the low-level shutoff valve is to control the flow of fuel BEING TRANSFERRED OUT OF A PRESSURIZED TANK
The action used by the low-level shutoff valve to prevent the reverse flow of fuel through the valve is CHECK VALVE
Malfunctions of a fuel system vent float valve can be cuased by ROUGH HANDLING OF THE VALVE DURING INSTALLATION
In a direct current (DC), liquid-level fuel indication system, the wiper contact is positioned on the resistance strip by THE MOVEMENT OF A FLOAT IN THE TANKS
The primary purpose of the air pressure regulator in a fuel system is to CONTROL THE AMOUNT OF PRESSURE ENTERING THE FUEL TANK
Fuel system disconnect couplings are used TO INTERRUPT THE FLOW OF FUEL OR AIR AND PREVENT THE LOSS OF FLUID
All of the following aircraft systems use engine bleed air (EBA) except FIRE EXTINGUISHING
Aircraft engine temperature and pressure as it applies to the bleed air system is determined by the ENGINE THROTTLE SETTING AND AMBIENT TEMPERATURE
Engine bleed air (EBA) check valves are installed to PREVENT THE LOSS OF COMPRESSED BLEED AIR
When installing air-conditioning ducting, the tool used to ensure alignment and sealing is the RAWHIDE MALLET
When a compressible flange duct end becomes distorted, the corrective action that should be taken is to RESHAPE THE DUCT FLANGE END TO ITS ORIGINAL SHAPE
Fiberglass fabric duct installations are prevented from swelling when the aircraft climbs to high altitudes by VENT HOLES
A depression in the duct wall, wherein the surface of the material isn't cut or removed but the depression has caused sharp bends or creases in the material, is the definition of a MAJOR DENT
The air-conditioning in a cargo aircraft uses a diverter valve to divert air to FLIGHT STATION AND CARGO COMPARTMENTS
If the temperature of the bleed air from a cargo-type air-conditioning system's primary heat exchanger exceeds 540 degrees Fahrenheit, the high limit section of the temperature anticipator will CLOSE THE BLEED AIR REGULATING AND SHUTOFF VALVE
Bleed air system water separators remove 70 to 85 percent of the moisture that accumulates in the conditioned air. This is a result of RAPID EXPANSION
The action of the outflow valve in a fixed-isobaric, single-differential pressurization system is controlled by REGULATING CONTROL CHAMBER PRESSURE
The purpose of the pneumatic relay in a cabin pressurization system is to ENSURE BOTH OUTFLOW VALVES OPERATE AT THE SAME TIME
The manual control valve in the variable isobaric pressurization system is used as an alternate when the CABIN PRESSURE CONTROLLER FAILS
Frequently used in fire warning systems, the fire detector that has a high-nickel steel rod located along the centerline of a stainless steel tube assembly is called AN IRON FIREMAN SWITCH
The maximum circuit resistance within a thermocouple circuit is 5 OHMS
The direct current (DC) voltage supplied to the lights in a photoelectric circuit is pulsed at a rate of 10 HZ
A liquid fire extinguishing agent douses a fire by REMOVING OXYGEN FROM THE AREA
A principal disadvantage of liquid fire extinguishing agents is they ARE POISONOUS OR HIGHLY TOXIC
A steady red light on the fire emergency control handle in a liquid-agent fire extinguishing system indicates A FIRE
When the pressure in a T-handle liquid fire extinguisher container becomes too low, A LIGHT ON THE COCKPIT PANEL WILL GLOW
At no time shall fire extinguishing residue, such as that resulting from the use of CB type or foam type fire extinguishing materials, be allowed to remain on the equipment for a period exceeding 4 HOURS
Oxygen is described as being TASTELESS, COLORLESS, AND ODORLESS
At altitudes beteen 10,000 and 15,000 feet, the greatest danger from hypoxia is AN ERROR IN JUDGMENT
The disadvantage of a continuous-flow oxygen regulator is it WASTES OXYGEN
you are operationally checking a pressure-demand oxygen regulator. When you blow into the mask with the diluter toggle set at 100% OXYGEN, you should get POSITIVE RESISTANCE
An H-2 emergency assembly (bailout bottle) supplies oxygen to the user for a maximum of about 10 MINUTES
In a molecular sieve oxygen generating system (MSOGS), water droplets from the air are removed by a(n) MSOGS CONCENTRATOR INLET FILTER
What does the molecular sieve oxygen generating system (MSOGS) concentrator supply to the OXYGEN regulator control panel? 93 PERCENT OXYGEN-ENRICHED GAS
Liquid oxygen (LOX) converts to gaseous oxygen (GOX) at an expansion ratio of 860 TO 1
The safety feature that protects liquid oxygen (LOX) containers from excessive pressure caused by leaks in the inner container is the BLOWOUT DISC
A liquid coolant system (LCS) keeps electronic components cool by CYCLING COOLANT THROUGH THE ELECTRONIC COMPONENT
The characteristic of the fluid used in a liquid coolant system (LCS) that makes it suitable as a coolant for electronic components is its NONCONDUCTANCE
Air trapped in a liquid coolant system (LCS) REDUCES THE COOLING CAPACITY OF THE COOLANT
Created by: dantruo

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