WorksheetsMetallic Structures Q1
Total questions: 20
Worksheet time: 10mins
(8042) A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is in the
number of locking collar grooves.
shape of the head.
method of installation.
(8043) Alloy 2117 rivets are heat treated
by the manufacturer and do not require heat treatment before being driven.
by the manufacturer but require reheat treatment before being driven.
to a temperature of 910 to 930°F and quenched in cold water.
(8044) The general rule for finding the proper rivet diameter is
three times the thickness of the materials to be joined.
two times the rivet length.
three times the thickness of the thickest sheet.
(8045) The shop head of a rivet should be
one and one-half times the diameter of the rivet shank.
one-half times the diameter of the rivet shank.
one and one-half times the diameter of the manufactured head of the rivet.
(8052) Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the
possibility of causing delamination.
increased possibility of fretting corrosion in the fastener.
difficulty in forming a proper shop head.
(8101) How many MS20470 AD-4-6 rivets will be required to attach a 10 x 5 inch plate, using a single row of rivets, minimum edge distance, and 4D spacing?
56
54
52
(8102) On a semimonocoque fuselage, the skin is reinforced by longitudinal structural members called
beams and struts.
longerons and stringers.
formers and bulkheads.
(8106.1) What is the minimum edge distance allowed for aluminum alloy single lap sheet splices containing a single row of rivets as compared to a joint with multiple rows, all rivets being equal in diameter?
The minimum edge distance for the single row is greater than that for the multiple row.
The minimum edge distance for the single row is less than that for the multiple row.
The minimum edge distance for the single row is equal to that for the multiple row.
(8107) Which statement is true regarding the inspection of a stressed skin metal wing assembly known to have been critically loaded?
If rivets show no visible distortion, further investigation is unnecessary.
If bearing failure has occurred, the rivet shanks will be joggled.
If genuine rivet tipping has occurred, groups of consecutive rivet heads will be tipped in the same direction.
(8108) What is the minimum edge distance for aircraft rivets?
Two times the diameter of the rivet shank.
Two times the diameter of the rivet head.
Three times the diameter of the rivet shank.
(8110) What is the minimum spacing for a single row of aircraft rivets?
Two times the diameter of the rivet shank.
Three times the length of the rivet shank.
Three times the diameter of the rivet shank.
(8118) Clad aluminum alloys are used in aircraft because they
are naturally corrosion resistant, so they do not require corrosion resistant materials for protection.
have surface layers of pure aluminum or aluminum alloy bonded to the core material to inhibit corrosion.
are highly corrosion resistant because an oxide film forms on their surfaces upon contact with air.
(8119) Which statement is true regarding a cantilever wing?
It has nonadjustable lift struts.
No external bracing is needed.
It requires only one lift strut on each side.
(8120) Aircraft structural units, such as spars, engine supports, etc., which have been built up from sheet metal, are normally
repairable, using approved methods.
repairable, except when subjected to compressive loads.
not repairable, but must be replaced when damaged or deteriorated.
(8123) Parts fabricated from Alclad 2024-T3 aluminum sheet stock must have all
bends made with a small radius to develop maximum strength.
bends 90° to the grain.
scratches, kinks, tool marks, nicks, etc., must be held to a minimum.
(8124) The monocoque fuselage relies largely on the strength of
longerons and formers.
skin or covering.
bulkheads and longerons.
(8125) Which part(s) of a semi-monocoque fuselage prevent(s) tension and compression from bending the fuselage?
Ribs and formers.
Longerons and stringers.
Bulkheads and skin.
(8132) Which of the following need not be considered when determining minimum rivet spacing?
Rivet diameter.
Rivet length.
Type of material being riveted.
(8138) The primary alloying agent of 2024-T3 is indicated by the number
2
20
24
(8141) Most rivets used in aircraft construction have
dimples.
smooth heads without markings.
a raised dot.
