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CDC 2A655

Aircraft Hydraulic Systems Journeyman (Volume 2)

QuestionAnswer
What terms are used to describe the physical qualities of fluid? Pressure transmission, incompressibility, expansion, and contraction.
What is the most commonly used gas in an aircraft hydraulic system? Nitrogen
Who said "All gases expand and contract in direct proportion to the change in temperature, provided the pressure is constant"? Charles
To obtain mechanical advantage use the formula, mechanical advantage equals... resistance divided by effort
In the Metric system all basic units are divisible by... 10
To convert centigrade to Fahrenheit you would... multiply the centigrade temperature by 1.8 and add 32.
If the lift of an aircraft is equivalent to its weight, theoretically, the aircraft should... maintain a constant altitude.
If an aircraft's thrust is as great as its drag the aircraft should... maintain a constant speed
What flight control surface provides directional control about the vertical axis? Rudder
What are aerodynamic braking devices, known as speed brakes, used for? To decrease landing distances
What are aircraft trim systems used for? To correct minor deviations in flight attitude.
Generally, trim systems are operated hydraulically, electrically, or electro-hydraulically.
Corrosion is defined as the... deterioration of a metal by reaction to its environment
What are the two types of penetrant inspections? Fluorescent and dye.
When you are inspecting an aircraft
What terms are used to describe the physical qualities of fluid? Pressure transmission, incompressibility, expansion, and contraction.
What is the most commonly used gas in an aircraft hydraulic system? Nitrogen
Who said "All gases expand and contract in direct proportion to the change in temperature, provided the pressure is constant"? Charles
To obtain mechanical advantage use the formula, mechanical advantage equals... resistance divided by effort
In the Metric system all basic units are divisible by... 10
To convert centigrade to Fahrenheit you would... multiply the centigrade temperature by 1.8 and add 32.
If the lift of an aircraft is equivalent to its weight, theoretically, the aircraft should... maintain a constant altitude.
If an aircraft's thrust is as great as its drag the aircraft should... maintain a constant speed
What flight control surface provides directional control about the vertical axis? Rudder
What are aerodynamic braking devices, known as speed brakes, used for? To decrease landing distances
What are aircraft trim systems used for? To correct minor deviations in flight attitude.
Generally, trim systems are operated hydraulically, electrically, or electro-hydraulically.
Corrosion is defined as the... deterioration of a metal by reaction to its environment
What are the two types of penetrant inspections? Fluorescent and dye.
When you are inspecting an aircraft hydraulic system, what is the first component you should look at? The reservoir for proper servicing.
Where is the best place to start inspecting an aircraft rudder control system? In the flight deck.
How much pressure should be in the hydraulic system when the accumulator is initially air charged? Zero
Shock struts should be serviced with what? Nitrogen
If there is an improper oil level in the shock strut chamber, the... strut could bottom out on landing
During what trouble shooting step should you take care to notice all the symptoms of unsatisfactory system operation? Observe the problem
In what troubleshooting step do you examine probable causes that can be checked easily before trying those that require involved procedures? Isolate through elimination
What is the maximum number of flats an MS B-nut can be tightened? 2
Why would you use a heavy plastic cover when proof testing a hose assembly? Provide protection for the person testing the hose in case of rupture.
What is the length of a medium pressure hose assembly having the number MS28741-4-0124? 12 and 1/2 inches
What is the first step in fabricating a medium pressure hose made of a Teflon resin? Select the proper size bulk hose
An installed rubber hose's identification markings spiral around the hose. This indicates the... hose is twisted.
What AFI covers the Composite Tool Kit (CTK) program? AFI 21-101, Aircraft and Equipment Maintenance Management
How are ball peen hammers classified? According to the weight of the head
What kind of pliers are mainly used for holding or bending flat or round stock? Slip-joint
If you use the point of diagonal pliers to cut material, the jaws will spring.
To hold objects in tight places or make delicate adjustments, you would use... needle-nose pliers
A disadvantage of the box-end wrench is that... it must be lifted from the nut and repositioned for another turn.
What wrench would be best used where an obstruction would prevent the use of a regular socket? Crowfoot
What type of wrench is designed to fit into the recessed head of a setscrew or capscrew? Hex-head
Which punch would you use to break loose a tapered pin? Starting
The total movement of a dial indicator is read by... adding the minus reading with the plus reading.
A tensiometer is used to measure the... amount of tension applied to a cable.
What is your first step when checking cable tension? Determine the cable size.
A micrometer reading of 1.68 is equal to one and sixty-eight... hundredths
How far does a micrometer move for each complete revolution of the thimble? 0.025 inch
One of the greatest abuses when using a micrometer is... over tightening the thimble
Torque wrenches should not be used in their lower... 20 percent range.
When considering where to safety wire an electrical cannon plug, what should you not do? Safety wire it to a fuel, oil, or oxygen line.
What minimum clearance should be maintained when clamping tubing to a rigid structure? 1/16 inch
MS flareless fittings are designed primarily for use... in high-pressure systems that are subjected to severe vibrations.
Why should you take care to not get any anti-seize material on the end of a pipe fitting during installation? May contaminate the hydraulic system.
The grip length of a bolt is the ... unthreaded area.
What are the two general groups of aircraft nuts? Nonself-locking and self-locking
The best way to determine if a cable has broken wires is to... run a cloth along the length of the cable.
When installing a hydraulic seal, what is the first step you should take? Check to see if the seal is the right size.
Backup rings are not necessary in a hydraulic system when the operating pressure is less than... 1,500 psi.
Most USAF aircraft designed to use MIL-H-5606 have been converted to use what hydraulic fluid? MIL-H-83282
When is it permissible to heat a lubricant? Never
In addition to a light film of hydraulic fluid, what can be used to lubricate a hydraulic seal? VV-P-236
What type of cleaning solvent should be used on common parts removed from the nosewheel steering system? Technical order prescribed solvent
What abrasive paper can be used to clean most surfaces? Aluminum oxide paper
To inhibit corrosion, MIL-S-81733 sealant has... chromates.
Room temperature vulcanized sealants are... silicone-based.
The opposition to current flow is called what? Resistance
What electrical circuit has only one path for current to flow? Series
What is an open circuit? A circuit that is incomplete.
What is considered a shorted circuit? A circuit that produces larger than normal current flow.
To check resistance, you should place the digital multimeter function selector rotary switch to what position? Ohms
An ohmmeter indicates an open circuit when it reads what? Infinity
What type of electrical schematic leaves out the portions that are irrelevant? specific-condition schematic
What type of schematic should be used when trying to find wire numbers or splice points? Wiring diagram
What is a disadvantage of the wiring diagram? It's so detailed as to be crowded.
What TO will tell you the function of the components as well as how they're supposed to work in the system? General system TO.
How does a schematic show that the poles of a multiple-pole switch move together? The poles are connected by a dotted line.
How, if at all, does a schematic show the various positions a switch can be in? The switch is labeled with text to indicate the switch positions.
When a schematic shows a switch, what does a triangle-shaped contact indicate? The switch is spring-loaded away from the triangle.
How are position switches positioned? By a moving surface.
In what position, if any, are relays generally drawn in schematics? In their de-energized positions.
What is the function (purpose) of a diode? It allows current to flow in one direction only.
How do electrical schematics indicate connected wires that cross each other? With a junction dot.
What is a terminal board? A junction where various wires come together.
Where should you start on an electrical schematic if you want to identify applied voltage? At the circuit breaker.
When following a schematic, where should you start if you're trying to learn more about how a system works? At the control switches.
The oil-fog lubricator on the hose cutting machine is serviced with... SAE 10 weight motor oil.
When using the skiving section of the hose cutting and skiving machine, how can you tell that the hose has been skived properly? The wire braid appears bright, but the wires are not disturbed
The three positions of the control switch on the clutch control box of the hose assembly machine are... RUN, OFF, and JOG.
On the Avitech AV843 test stand, the hydraulic fluid heater automatically shuts off when the fluid reaches... 180 F
The Avitech AV843 test stand two-stage flowmeter is calibrated for use with... MIL-H-5606, MIL-H-83282, and MIL-H-6083.
At what pressure will the pressure system boost switch shut down the Avitch AV843 test stand high-pressure pump motor? 70 +/- 10 psig
When performing a "before each use" inspection on the Avitech AV843 test stand, what quantity level should the reservoir be at? 3/4
The Avitech AV843 test stand's air pump lubricator is serviced with... SAE 10 oil
One hazard associated with the MJ-2A hydraulic test stand that is not prevalent in other pieces of AGE? Possibility of a high-pressure line rupturing
During operation of the MJ-2A hydraulic test stand, the condition of the low-pressure filters can be determined by checking the... filter inlet and outlet pressure.
The SGNSC's 95.5% purity circuit ensures that the high pressure nitrogen is... clean and dry.
After the A/M32A-60 generator set has reached 95 percent of governed speed, you should... reset the AC system.
On the B-1 stand, the lock assembly rotates around the... cylinder piston rod sleeve.
Which maintenance stand uses four adjustable screw-type pads for leveling? B-2
You have pumped a B-5 stand up to the desired height, what should you do next? Close the vent plug.
Who may perform jacking operations? Qualified personnel
The air vent on the jack's reservoir is used to... prevent a vacuum from being created.
Created by: rustyrose