Download AVMT 1015 Final Study Guide Questions And 100% Correct Answers and more Exams Aviation in PDF only on Docsity!
AVMT 1015 Final Study Guide Questions And
100% Correct Answers
Ni-Cad battery cases and drain surfaces which have been affected by electrolyte shouldbe neutralized with a solution of what? - ANSWER Boric acid
What is the result of the chemical reaction involving hydrogen gas and metal? - ANSWERHydrogen Embrittlement
What material is used to wipe down an aircraft just before painting? - ANSWER AliphaticNaphtha
When using flammable cleaning agents, what should be the material of the wiping cloth?- ANSWER Cotton
Is is imperative that all cleaning agents are __________ to inhibit the corrosion process -ANSWER Approved by the aircraft's CMM
What is used to protect the interior structure of a steel tube assembly from corrosion? -ANSWER Linseed Oil
Dissimilar metal corrosion is also known as what? - ANSWER Galvanic Corrosion Why is it important not to rotate the crankshaft after the corrosion prevention mixturehas been put into the cylinders on an engine parked for storage? - ANSWER To not strip the cylinders/camshaft/crankshaft of the corrosion prevention mixture. If an aircraft tire comes in contact with oil or grease, what should be done to preventrapid deterioration of the tire? - ANSWER Wash with soapy water to get rid of
contaminants. Which aircraft metal is considered to be the most ANODIC? - ANSWER Magnesium What is the next stage after surface corrosion? - ANSWER Pitting What type of corrosion forms underneath paint and leaves a worm-like appearance? -ANSWER Filiform corrosion.
What type of corrosion forms between close fitting parts that have a slight amount ofrelative movement between them? - ANSWER Fretting Corrosion.
What type of corrosion is the result from an improper heat treatment process andoccurs along the grain boundaries of a metal? - ANSWER Intergranular Corrosion
Give two examples of corrosive agents - ANSWER Salts and battery acid Provide three examples of areas on an aircraft which are more prone to corrosion. -ANSWER The landing gear, battery box, and control cables if not treated properly.
In order to prevent scratching, what is the proper method to clean an acrylicwindshield? - ANSWER Rinse with water, clean, then dry with a microfiber cloth to prevent streaking, do not rub dry, this will cause static build up and scratching of theacrylic.
True or false. A nonelectrolytic chemical treatment for aluminum alloys to increasecorrosion resistance and paint-bonding qualities is called anodizing. - ANSWER False, anodizing uses electric current. When an anodized surface coating is damaged in service, it can be partially restored by A - applying a thin coat of zinc chromatic primer
Which of the following describes the effects of annealing steel and aluminum alloys? 1 - decrease in internal stress 2 - softening of the metal3 - improved corrosion resistance
A - 1, 2 B - 1, 3 C - 2, 3 - ANSWER A - 1, 2 Which heat-treating process of metal produces a hard, wear-resistant surface over astrong, tough core? - ANSWER Case hardening
Which of the following occurs when a mechanical force is repeatedly applied to mostmetals at room temperature, such as rolling, hammering, or bending?
- The metals become artificially aged
- The metals become stress corrosion cracked3. The metals become cold worked, strain, or work hardened
A - 2B - 1 and 3 C - 3 - ANSWER C - 3 What aluminum alloy designations indicate that the metal has received NO hardening ortempering treatment? - ANSWER "F"
What is descriptive of the annealing process of steel during and after it has beenannealed?
A - rapid cooling; high strength B - slow cooling; low strength C - slow cooling; increased resistance to wear - ANSWER B - slow cooling; low strength Unless the maintenance manual specifies otherwise, the threads should be __________(in what condition) when torquing a bolt. - ANSWER Clean, dry, and oil-free
Where should a fiber type locking nut NOT be used? A - baggage area B - engine compartmentC - passenger seats - ANSWER B - engine compartment
What class of threads is typically used on aircraft applications? A - class one B - class twoC - class three - ANSWER C - class three
Aircraft bolts with a cross or asterisk marked on the bolthead are what? A - made of aluminum alloyB - close tolerance bolts C - standard steel bolts - ANSWER A - made of aluminum alloy In general, bolt grip lengths should be __________ to the material thickness - ANSWEREqual
C - micrometer caliper - ANSWER A - combination set Which tool is used to check the stem on a poppet valve for stretch? - ANSWERMicrometer/dial caliper
Metal tubing fluid lines are sized by wall thickness and what? A - outside diameter in 1/16 inch incrementsB - inside diameter in 1/16 inch increments C - outside diameter in 1/32 inch increments - ANSWER A - outside diameter in 1/16 inchincrements
When flaring aluminum tubing for use with AN fittings, the flare angle must be A - 37° B - 30° C - 45° - ANSWER A - 37° Flexible lines must be installed with: A - enough slack to allow maximum flexing during operation B - a slack of 10-12% of the lengthC - a slack of 5-8% of the length - ANSWER C - a slack of 5-8% of the length
How is flexible hose sized? A - outside diameter in 1/16 inch increments B - inside diameter in 1/16 inch increments
C - outside diameter in 1/32 inch increments - ANSWER B- inside diameter in 1/16 inchincrements
What is another name for thickness gauges? - ANSWER Feeler gauges Which tool is used to measure crankshaft run-out? - ANSWER Dial indicator What tool is generally used to calibrate a micrometer or check its accuracy? A - gauge block B - machinists scaleC - dial indicator - ANSWER A - gauge block
The clearance between the piston rings and the ring lands is measured with what tool? -ANSWER Thickness or feeler gauges
What type of weld is in one parallel line? - ANSWER A butt joint What type of weld is in the corner of a 90° angle? - ANSWER A tee joint or corner joint What type of weld is one piece of metal partially on top of another piece of metal? -ANSWER A lap joint
Magnetic particle inspection is primarily used to detect what? A - distortion B - deep subsurface flaws C - flaws on or near the surface - ANSWER C - flaws on or near the surface
repair technique. What nondestructive testing method is used to determine thesoundness of the repair after the repair has cured? - ANSWER Coin/tap test
True or false. Aluminum alloys can be properly inspected for defects on a mag particlemachine? - ANSWER False
One way a part may be demagnetized after magnetic particle inspection is by A - subjecting the part to high voltage, low amperage AC B- slowly moving the part out of an AC magnetic field of sufficient strength C - slowly moving the part into an AC magnetic field of sufficient strength - ANSWER B -slowly moving the part out of an AC magnetic field of sufficient strength. Which type crack can be detected by magnetic particle inspection using either circularor longitudinal magnetization? - ANSWER A crack at 45°
Which of the following methods may be suitable to use to detect cracks open to thesurface in aluminum forgings and castings?
1 - dye pen inspection 2 - mag particle inspection3 - coin/tap inspection 4 - eddy current inspection 5 - ultrasonic inspection6 - visual inspection
A - 1, 4, 5, 6B - 1, 2, 4, 5, 6
C - 1, 2, 3, 4, 5, 6 - ANSWER A - 1, 4, 5, 6
In mag particle inspection, a flaw that is perpendicular to the magnetic field flux linesgenerally causes
A - a large disruption In the magnetic fieldB - a minimal disruption in the magnetic field C - no disruption in the magnetic field - ANSWER A - a large disruption in the magneticfield
In performing a dye pen inspection, the developer A - seeps into a surface crack to indicate the presence of a defect B - acts as a blotter to produce a visible indicationC - thoroughly cleans the surface prior to inspection - ANSWER B- acts as a blotter to produce a visible indication Circular magnetization of a part can be used to detect which defects? - ANSWERDefects that are parallel to the object
When performing a liquid penetrant inspection, what is the first step? - ANSWER Cleanthe part thoroughly
