Aircraft Construction, Repair & Modification 2019 Board Exam

  1. “Reheating” of a metal is the application of heat, usually to remove

·       extreme hardness and brittleness

·       carbon content

·       cracks, voids or cold shuts

·       the effects of heat treatment

  1. The part of the aircraft which receives or encloses the landing gear as it retracts is

·       wheel fairing

·       wheel well

·       wheel bay

·       engine pod

  1. When preparing an aircraft for weighing, which of the following should be filled unless otherwise noted in the aircraft specifications or manufacturer’s instructions?

·       Lavatory tanks

·       Potable water containers

·       Hydraulic reservoir

·       Fluid reservoir for injection in the engines

  1. Which aircraft reference is used to evaluate structural damages?

·       SRM (Structural Repair Manual)

·       AMM (Aircraft Maintenance Manual)

·       TSM

·       IPC

  1. If a 50‑pound tool applies +1500 inch‑pounds to a reference axis, the tool is located ____ from the axis.

·       +30

·       +20

·       −20

·       −30

  1. How many MS20426 DD 4‑5 rivets will be required to attach a 10 in × 15 in plate, using a single row of rivets, minimum edge distance, and 4D spacing?

·       52

·       56

·       45

·       50

  1. Heating the metal slightly above its critical temperature and rapidly cooling by quenching is a process called

·       tempering

·       annealing

·       normalizing

·       hardening

  1. Fiberglass damage that extends completely through a laminated sandwich structure

·       may not be repaired

·       must be filled with resin to eliminate dangerous stress concentrations

·       may be repaired

·       may be filled with putty compatible with resin

  1. What is the four‑digit SAE number of molybdenum steel with 1% chromium and 0.30% carbon?

·       SAE 4130

·       SAE 2130

·       SAE 1130

·       SAE 3130

  1. It is the maximum weight at which takeoff is permitted.

·       Maximum ramp weight

·       Maximum empty weight

·       Maximum takeoff weight

·       Maximum gross weight

  1. The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the

·       minimum radius of bend

·       neutral radius of bend

·       bend allowance

·       maximum radius of bend

  1. Which of the following methods may be suitable to detect cracks open to the surface in aluminum forgings and castings?
    (1) Dye penetrant inspection
    (2) Magnetic particle inspection
    (3) Metallic ring inspection
    (4) Eddy current inspection
    (5) Ultrasonic inspection
    (6) Visual inspection

·       1,2,3,4,5,6

·       1,2,4,5,6

·       1,5,6

·       1,4,5,6

  1. A type of wing construction which holds fuel without the usual fuel tanks is

·       moist wing

·       dry wing

·       box‑beam wing

·       wet wing

  1. What is the internal force of a substance which opposes or resists deformation?

·       Strain

·       Shear

·       Stress

·       Compression

  1. What heavy longitudinal members are usually extended across several bulkheads and formers to resist primary bending loads?

·       Longerons

·       Stiffeners

·       Formers

·       Bulkheads

  1. Certain structural parts may be heat‑treated and therefore could require special handling. In general, the more responsive an alloy steel is to heat treatment, the less suitable it is for

·       brazing

·       bolting

·       riveting

·       welding

  1. When reading a blueprint, a dimension is given as 4.387 inches +0.005, −0.002. Which of the following is true?

·       The tolerance is 0.007

·       The tolerance is 0.004

·       The maximum acceptable size is 4.385 inches

·       The maximum acceptable size is 4.389 inches

  1. If the datum line is placed at the nose of an airplane rather than at the firewall or some other location aft of the nose, measurement arms will be

·       zero

·       in positive numbers

·       either positive or negative depending on the manufacturer’s preference

·       in negative numbers

  1. What type of stress exists in a material that is subjected to cyclic or repeated loading?

·       Tension stress

·       Fatigue stress

·       Torsional stress

·       Compression stress

  1. It is the property of a material that permits little bending or deformation without fracture.

·       Malleability

·       Ductility

·       Hardness

·       Brittleness

  1. What type of corrosion may attack the grain boundaries of aluminum alloys when the heat‑treatment process has been improperly accomplished?

·       Concentration cell

·       Fretting

·       Intergranular

·       Fatigue

  1. The structural member that attaches the nacelle to the wing is called

·       none of these

·       strut

·       pylon

·       spar

  1. Which fasteners are used in areas that are accessible on one side only?

·       Taper bolts

·       Blind fasteners

·       Solid rivets

·       Tap screws

  1. Repairing shallow scratches in sheet metal is made by

·       patching

·       buffing

·       stop drilling

·       burnishing

  1. In rivet identification, type AD rivets have a dimple‑depressed dot on the head and colored yellow dichromate; they are made of

·       2117 AL

·       1100 AL

·       7050 AL

·       2024 AL

  1. Which steel parts are normally considered repairable by welding?

·       SAE 4130 chrome/molybdenum tubing

·       Streamline wire braces

·       Turnbuckle ends

·       Brazed or soldered parts

  1. When using a color‑contrast dye‑penetrant kit and a small crack is suspected in the material:

·       Less inhibitor should be used

·       A magnifying glass is recommended

·       All of these processes can be performed

·       Less developer should be used

  1. Where is an AN clevis bolt used in an aircraft?

·       For tension and shear load conditions

·       Only for shear‑load applications

·       Where external tension loads are applied

·       For control‑cables connection

  1. An aircraft’s LEMAC and TEMAC are defined in terms of distance from

·       Each other

·       The wing center of lift

·       The main wheels

·       The datum

  1. An electrolyte from an aircraft nickel‑cadmium battery spilled on aircraft structure is best neutralized by

·       Liquid soap

·       Water

·       Boric acid

·       Vinegar

  1. One of the main advantages of honeycomb structure is that it

·       is relatively fireproof

·       is very strong because it is heavy

·       does not require inspections

·       is better able to withstand sonic vibration

  1. What is considered the smallest element of a control cable?

·       Rod

·       Strand

·       Wire

·       Pulley

  1. Find the empty‑weight CG location for the following tricycle‑gear aircraft. Each main wheel weighs 753 lb, nosewheel weighs 22 lb, distance between nosewheel and mains is 87.5 in; nosewheel station is +9.875 in from datum, 1 gal of hydraulic fluid at −21.0 in is included in the weight scale.

·       +96.11 in

·       +97.45 in

·       +85.07 in

·       −85.67 in

  1. In weight and balance, to find the weight of the aircraft, the tare weight in reference to the scale reading shall be

·       added

·       subtracted

·       divided

·       multiplied

  1. An airplane should be rigged to fly hands‑off at

·       landing speed

·       sea level

·       cruising speed

·       never‑exceed speed

  1. Joggles in removed rivet shanks would indicate partial

·       Bearing failure

·       Shear failure

·       Tear failure

·       Tension failure

  1. Stepping or layering doublers at a repair and tapering of the repair parts will produce

·       increase fatigue cracking

·       gradual load transfer

·       aerodynamic consideration

·       hard point

  1. The minimum distance between centers of rivet holes is

·       2 × rivet diameter

·       5 × rivet diameter

·       3 × rivet diameter

·       4 × rivet diameter

  1. When locating FS 150, measure

·       150 in aft of the buttock line

·       150 in aft of the zero or fixed reference line

·       150 in aft of the nose

·       150 in forward of the empennage

  1. The pitch of a rivet to be used to join a sheet of 0.032‑in and 0.064‑in aluminum alloy should be equal to

·       two times the rivet diameter plus 0.032 in

·       one and one‑half times the rivet diameter plus 0.096 in

·       two times the rivet diameter plus 0.064 in

·       three times the rivet diameter plus 0.096 in

  1. The shear strength of an AN470DD‑6‑8 rivet, immediately after driving, is approximately 75 percent of its ultimate shear strength. The remaining 25 percent is obtained by

·       aging at ordinary room temperature for about 4 days

·       reheating the riveted unit for an hour

·       relieving stress by vibration

·       shear loads imposed on the riveted assembly in use

  1. Alloy 2117 rivets are heat‑treated

·       to 490–500 °C and quenched in cold water

·       by the manufacturer but require reheat treatment before being driven

·       by the manufacturer and do not require heat treatment before being driven

·       to 500–510 °C and quenched in cold water

  1. Which number represents the Vernier caliper scale graduation of a micrometer?

·       .01

·       .001

·       .00001

·       .0001

  1. Magnetic‑particle inspection is used primarily to detect

·       flaws on or near the surface

·       surface cracks

·       deep subsurface flaws

·       distortion

  1. When an aircraft is being weighed, the brakes should be

·       full on

·       set to “park”

·       set just enough to retard any tendency of the aircraft to move

·       full off and wheel chocks should be used

  1. What is the allowable manufacturing tolerance for a bushing where the outside dimensions shown on the blueprint are 1.0625 +0.0025, −0.0003?

·       0.0028

·       0.0025

·       1.0650

·       1.0647

  1. It refers to the weight of an item multiplied by its arm.

·       Moment

·       Vertical axis

·       Reference datum

·       Arm

  1. Brinell hardness test is accomplished by the application of a standard load to a smooth surface of metal

·       through a hardened steel ball, 1 cm in diameter

·       through a cylindrical steel shaft 1 cm in diameter

·       by pressing a small cylindrical pyramid diamond

·       to set a hardened steel ball

  1. In cases of elongated bolt holes in a wood spar or crack in the vicinity of bolt holes,

·       the spar may be reinforced by using birch reinforcing plates

·       it is permissible to plug the hole with hardwood and redrill

·       a plug should be inserted in the hole and a reinforcement plate added

·       a new section of spar should be spliced in or the spar replaced entirely

  1. It is a test for material hardness in which a hardened steel ball, one centimeter in diameter, is pressed under a known pressure into a flat surface of the test specimen.

·       Moh

·       Tig

·       Brinell

·       Hooke