Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
161 Cards in this Set
- Front
- Back
|
Which terms are used to describe the physical qualities of fluids? |
Pressure transmissions, incompressibility, expansion and contraction |
|
|
What will happen if heat is applied to a confined fluid? |
Pressure will increase |
|
|
What happens to fluid resistance as the rate of fluid flow increases? |
Decreases |
|
|
Pascals law States that when a force is exerted on a confined body of fluid, the pressure is transmitted... |
Equally in all directions |
|
|
What law States "All gases expand and contract in direct proportion to the change in temperature, provided the pressure is constant?" |
Charles law |
|
|
What unit of measurement is used to express an amount of force? |
Pounds |
|
|
Mechanical advantage equals what? |
Resistance divided by effort |
|
|
A moving automobile, a moving stream of water, and the wind are examples of what type energy? |
Kinetic |
|
|
The law of the conservation of energy States that energy can be |
Neither created or destroyed |
|
|
What is the term used to describe the force that propels an aircraft forward? |
Thrust |
|
|
If the lift of an aircraft is equivalent to its weight, theoretically, the aircraft should |
Maintain a constant altitude |
|
|
What are aircraft "speed breaks" used for? |
Increase air drag, decreasing landing distance |
|
|
Which automatic flight control system improves the aircrafts handling characteristics when the pilot is flying the aircraft manually? |
Stability augmentation |
|
|
What type of corrosion is described as the intergranular or transgranular cracking of a metal caused by the combined effects of constant tensile stress and corrosion? |
Stress corrosion cracking |
|
|
What are the two types of penetrant inspections? |
Fluorescent and dye |
|
|
What are the two most important factors when preventing corrosion? |
Removal of the electrolyte and application of protective coatings |
|
|
Where is the best place to start inspecting an aircraft rudder control system? |
Flight deck |
|
|
Check a struts fluid level when it's fully... |
Deflated and fully compressed |
|
|
What could an improper oil level in an aircraft shock strut chamber cause? |
Strut to bottom out on landing |
|
|
When troubleshooting a hydraulic system, during what troubleshooting step should you make sure all unsatisfactory system operational check are identified? |
Observing the problem |
|
|
Where should the color-coded system identification tape be located on a hose assembly that is 26 inches long? |
One at each end of the hose |
|
|
What is one distinct advantage hose assemblies have over tubing? |
Flexibility |
|
|
How are ball peen hammers classified? |
Weight of the head |
|
|
Which kind of pliers are mainly used for holding or bending flat or round stock? |
Slip-joint |
|
|
Which pliers would be used to hold objects in tight places or make delicate adjustments? |
Neddle-nose |
|
|
What wrench would be best used where an obstruction would prevent the use of a regular socket? |
Crowfoot |
|
|
Which wrench would you use to hold or turn a barrel of an accumulator? |
Strap wrench |
|
|
Which type of punch has a sharp point and is used to mark the location of a hole to be drilled? |
Center punch |
|
|
Which punch would you use to break loose a tapered pin? |
Drift punch |
|
|
A tensionmeter is used to measure the |
Amount of tension applied to a cable |
|
|
Which is the first step when checking cable tension? |
Determine the cable size |
|
|
A micrometer reading of 1.68 is read, one and sixty-eight |
Hundredths |
|
|
How far of an inch does a micrometer move for each complete revolution of the thimble? |
0.025 |
|
|
One of the greatest abuses when using a micrometer is |
Over tighting the thimble |
|
|
In fractions of an inch, what minimum clearance should be maintained when clamping tubing to a rigid structure? |
1/16 |
|
|
The grip length of a bolt is the |
Unthreaded area |
|
|
The best way to determine if a cable has broken wires is to |
Run a cloth along the length of the cable |
|
|
Which does 28775 tell you in the seal part number MS28775-113? |
Seal type |
|
|
Backup rings are not necessary in a hydraulic system when the operating pressure is less than which pound per square inch? |
1500 square inch |
|
|
A major disadvantage of leather backup rings is |
Corrosion |
|
|
How many parts make up a shaft seal? |
2 |
|
|
Which characteristic must hydraulic fluid have to operate effectively and efficiently? |
Good lubricating qualities |
|
|
Which hydraulic fluid is used to preserve hydraulic systems and components? |
MIL-H-6083 |
|
|
Which type of toxic effect is a result of long and/or repeated exposure to a chemical? |
Chronic |
|
|
Which should be done with unused hydraulic fluid from containers that are opened for strut cleaning? |
Transfer it to a properly marked plastic pump-handle bottle |
|
|
Which lubricant is used in pneumatic and oxygen systems? |
MIL-G-4343 |
|
|
To facilitate installation and lubrication of stock strut packing use |
VV-P-236 |
|
|
In addition to a light film of hydraulic fluid, which can be used to lubricate a hydraulic seal? |
VV-P-236 |
|
|
Which type of cleaning solvent should be used on common parts removed from the nose wheel steering system? |
TO prescribed solvent |
|
|
To inhibit corrosion, MIL-S-81733 sealant contains |
Chromates |
|
|
The intensity of current flow is measured in |
Amperes |
|
|
What does a wiring diagram tell a technician? |
How a circuit is put together and how it operates |
|
|
Wires are represented on electrical schematics by |
Straight lines |
|
|
What formula is used to determine the voltage drop across any one resistor? |
E=I×R |
|
|
The total resistance in a parallel circuit is |
Less than the smallest resistance value in the circuit |
|
|
An open circuit is... |
Incomplete |
|
|
A short circuit... |
Produces larger than normal current flow |
|
|
Which position should the digital multimeter function selector rotary switch be placed to check resistance? |
Ohms |
|
|
How is an ohmmeter connected in a circuit? |
Parallel |
|
|
Which type of schematic is used when trying to find a wire number or splice points? |
Wiring diagram |
|
|
Which type schematic is detailed, crowded, and difficult to follow? |
Wiring diagram |
|
|
How does a schematic show that the poles of a multiple- pole switch moves together? |
Dotted line |
|
|
How, if at all, does a schematic show the various postions a manual switch can be in? |
The switch is labeled with text indicating the switch positions |
|
|
On a schematic, what does a triangle-shaped contact indicate on a switch? |
Spring-loaded away from the triangle |
|
|
Where should you start on a electrical schematic if you're trying to learn more about how a system works? |
Control switches |
|
|
Which thermal device protects the hose cutting and skiving machine drive motor, if it exceeds full-load current? |
Thermal overload relay |
|
|
The oil-fog lubricator on a hose cutting machine is serviced with |
SAE 10 weight motor oil |
|
|
Which should be done prior to the hose assembly machine inspection? |
Lock out electrical source |
|
|
At what pounds per square inch of pressure must the boost pressure drop to before the pressure system boost switch shuts down the Avitech A V843 test stand high-pressure pump motor? |
70+- 10 |
|
|
Which SAE weight oil is the Avitech A V843 test stands air pump lubricate serviced with? |
10 |
|
|
Which is the first step when performing the monthly check of Avitech A V843 test stands automatic heater? |
Start the boost pump |
|
|
The portable hydraulic test stand is used to |
Assist the technician is accurately verifying proper hydraulic system operation |
|
|
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 |
|
|
When adjusting the relief valve on the MJ-2A, rotate the relief valve knob to obtain what pounds per square inch? |
3,300 |
|
|
Which action would you take if a engine oil pressure does not register on the gauge within five seconds while starting the MC-1A? |
Push throttle in and turn the master switch OFF |
|
|
When maximum pressure is attained on the MC-1A air compressor, the compressor will unload |
Automatically |
|
|
At what percent will the purity remain between when self-generating nitrogen servicing carts system becomes stable? |
95.4 to 95.6 |
|
|
The self-generating nitrogen servicing carts service hose pressure reducing regulators, PRV1 and 2, regulates the pressure respectively from |
0-400 and 0-4000 |
|
|
What do the red lines painted on the side of the A/M32A-60 indicate? |
Turbine plane of rotation |
|
|
The exhaust stream is hot up to approximately how many feet above the A/M32A-60 generator exhaust stack? |
10 feet |
|
|
What determines the amount of electrical current that passes through the body in the event of electrical shock? |
Circuit voltage and body resistance |
|
|
During A/M32A-60 generator starting procedures, if combustion does not occur within 15 seconds after the start switch is placed in the Start position, immediately place the Master switch to |
OFF |
|
|
How many brakes must be engaged when a maintenance stand is in use? |
2 |
|
|
When a B-5 maintenance stand is raised to the desired height, what action taken next? |
Close the vent plug |
|
|
Who may perform jacking operation? |
Qualified personnel |
|
|
How high should an aircraft be jack? |
No higher then required to perform maintenance |
|
|
What is the air vent on a jacks reservoir used for? |
Prevent a vacuum from being created |
|
|
How many jacks for each wing might it take to lift the air forces heaviest bomber? |
3 each wing |
|
|
Which jacking team member ensures that larger aircraft is raised and lowered in a level manner? |
Plumb Bob operator |
|
|
Which jacking team member keeps the locknut against the cylinder while raising and lowering |
Observer |
|
|
What must be done just prior to actually jacking up the aircraft? |
Test the aircraft control valves |
|
|
What three physical qualities do all liquids have in common? |
Incompressibility, expansion & contraction, pressure transmission |
|
|
Bernoulli law |
Pressure of a fluid decreases at the point where velocity of fluid increases |
|
|
Pascal law- |
When a force is exerted on a confined body of fluid, the pressure is transmitted equally and undiminished in all directions |
|
|
Boyle law- |
The volume of an enclosed dry gas varies inversely with it's pressure, provided the temperature remains constant |
|
|
Charles law- |
Ads gases expand and contract in direct proportion to a change in temperature, provided pressure stay constant |
|
|
F=P×A |
Force= pounds×area |
|
|
What is mechanical advantage? |
Applied effort is multiplied on receiving end |
|
|
How many divisions are there in the centigrade temperature scale? |
100 |
|
|
What 4 aerodynamic forces affect an aircraft in flight? |
Gravity, thrust, drag, lift |
|
|
What are the three axes of an aircraft flight? |
Longitudinal, lateral, and vertical |
|
|
What flight controls are used to make an aircraft climb or dive? |
Elevators |
|
|
How is movement of the rudder controlled? |
Pilot uses heel pressure of either rudder pedal |
|
|
What are the secondary flight control surfaces? |
Spoiler, flaps, speed breakes, and trim system |
|
|
What are the four types of flaps? |
Plain flap, split flap, leading edge flap, and Fowler flap |
|
|
What are the three types of trim system? |
Roll trim, pitch trim, and yaw trim |
|
|
What mode of the auto pilot system automatically maintains aircraft speed? |
Mach hold |
|
|
Intergranular corrosion |
An attack on the grain boundaries of the metal |
|
|
Uniform surface corrosion |
Results from a direct chemical attack on a metal surface and involves only the metal surface |
|
|
Crevice/ concentration cell corrosion |
Occurs when the electrolyte has a different concentration from one area to another |
|
|
Galvanic corrosion |
Occurs when different metals are in contact with each other and with an electrolyte |
|
|
Stress corrosion cracking |
Cracking of a metal caused by combined effects of constant tensile stress and corrosion |
|
|
Exfoliation corrosion |
Shows itself by lifting up the surface grains of a metal by the force of expanding corrosion |
|
|
Pitting corrosion |
First noticeable as a white or grey powdery deposit |
|
|
How is corrosion identified on steel? |
Red rust |
|
|
Most used material used for aircraft construction? |
Aluminum |
|
|
How is copper corrosion identified? |
Accumulation of blue or blue-green corrosion on the part |
|
|
What determines the degree of protection provided by nickel and chromium? |
Plating thickness |
|
|
In what three areas of an aircraft is corrosion most likely to occur? |
Airframe, landing gear, and hydro system |
|
|
What are the five types of mechanical testing? |
Hardness, impact, tensile, bend, and fatigue |
|
|
3 types of NDI |
Magnetic practical, penetrant, x-ray |
|
|
Benefit to x-ray inspection |
Allows inspectors or engineer to see internal structure without destroying it |
|
|
Why is ambient air temperature important when servicing an accumulator? |
Because gas expands and contracting due to temperature |
|
|
What's the torque value of the swivel nut on a Schrader valve? |
60 plus or minus 10 |
|
|
Five steps of the problem-solving method of troubleshooting? |
Observe the problem, develop a list of possible causes, isolate through elimination, take corrective action, verify the fix |
|
|
Pressure limit for 5052-0 aluminum alloy |
1500 psi |
|
|
Pressure limit for 6061 aluminum alloy |
3000 psi |
|
|
Describe system identification tape- |
1 inch wide and has words, colors, and geometric symbols printed on it |
|
|
What's the geometric symbol for hydraulic lines? |
Circles |
|
|
Difference between MIL-H-8788 and MIL-H-8794 bulk hoses? |
8788 has an additional wire braid and a smooth outside covering |
|
|
Storage life for bulk rubber hose? |
52 quarters (13 years) |
|
|
Four types of punches? |
Center, starting, drift, and pin |
|
|
What's the range of threads per inch for a thread gauge? |
8 to 80 threads per inch |
|
|
What are 2 measurements capabilities of a dail indicator? |
Out of roundness and endplay of a shaft |
|
|
How would you "zero in" a dail indicator? |
Loosen the lock screw and rotate the dial |
|
|
How do you get the total movement of the dail indicator? |
By adding the plus or minus side |
|
|
What's the purpose of the tensionmeter handle? |
Clamp the cable in place |
|
|
How can you check the tensionmeter for accuracy? |
With a test bar |
|
|
How many degree is the flared bevel on an AN fitting? |
37° |
|
|
MS fittings are primarily designed for use in... |
High-pressure systems that are subject to high vibration and changing pressures |
|
|
Difference between pipe threads and machine threads? |
Pipe threads are tapered Machine threads are straight |
|
|
What are the two general types of seals used in hydraulic and pneumatic systems? |
Dynamic and static seals |
|
|
What are the split ends of a Teflon backup called? |
Scarfs |
|
|
What part of the shaft seal rotates with the drive shaft? |
Mating ring |
|
|
What type of grease is recommended for use in pneumatic systems? Why? |
Mil-G-4343. It won't harden or jam when it gets cold |
|
|
What are two basic reasons you'll be required to use sealants? |
Pressure and weather sealing |
|
|
What is a faying- surface seal? |
Seal brought about by the sandwiching of a sealant between mating surfaces |
|
|
What's RTV? |
Room temp vulcanized sealants |
|
|
What the rule of thumb when handling RTV? |
If it smells like vinegar don't use it |
|
|
What is voltage? |
Pressure that forces electrons through a conductor |
|
|
The rate of flow, or intensity, of a current is measured in what? |
Amps |
|
|
Ohms law- |
Any electrical circuit is directly proportional to voltage and inversely proportional to resistance |
|
|
Kirchhoffs law- |
Any closed circuit, the applied voltage is equal to the sum of the voltage drops around the circuit |
|
|
I?=E?÷R? |
Current=voltage÷resistance |
|
|
What do you call separate paths for current flow in a parallel circuit? |
Branches or legs |
|
|
What causes a relay to become energized? |
When the relay receives power and is grounded |
|
|
What is skiving? |
Removing the outer material down to a wire braid |
|
|
On the Avitech test stand, what's the horsepower of the DC motor? |
60hp |
|
|
What's the capacity of the Avitech high-pressure hydraulic pump? |
Capacity of 30 gpm at 3750 rpm, and a maximum pressure of 5000 psi |
|
|
What are the two main reasons for pressurizing a reservoir? |
1) stops the fluid from foaming at high altitudes 2) ensures a positive supply of fluid to the pump |
|
|
In an air-pressurized reservoir, where is the air for reservoir pressurization usually taken from? |
Aircraft engines bleed air |
