Studied by 5 peopleA well-designed rivet joint will subject the rivets to
shear loads
A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is in the
number of locking collar grooves
Alloy 2117 rivets are heat treated
by the manufacturer and do not require heat treatment before being driven
The general rule for finding the proper rivet diameter is
three times the thickness of the thickest sheet
The shop head of a rivet should be
one and one-half times the diameter of the rivet shank
One of the main advantages of Hi-Lok type fasteners over earlier generations is that
they can be installed with ordinary hand tools
The markings on the head of a Dzus fastener identify the
body diameter, type of head, and length of the fastener.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud length is measured in
hundredths of an inch
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in
sixteenths of an inch.
Threaded rivets (Rivnuts) are commonly used to
attach parts or components with screws to sheet metal
The installation of Cherrymax and Olympic-Lok rivets is accomplished by utilizing
a pulling tool.
Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the
possibility of causing delamination
Select the alternative which best describes the function of the flute section of a twist drill
Forms the cutting edges of the drill point.
What should be the included angle of a twist drill for soft metals?
90 degrees
When comparing the machining techniques for stainless steel sheet material to those for aluminum alloy sheet, it is normally considered good practice to drill the stainless steel at a
lower speed with more pressure applied to the drill.
When drilling stainless steel, the drill used should have an included angle of
140° and turn at a low speed
Which is correct concerning the use of a file?
Apply pressure on the forward stroke, only, except when filing very soft metals such as lead or aluminum.
What is one of the determining factors which permits machine countersinking when flush riveting?
Thickness of the material is greater than the thickness of the rivet head.
Which procedure is correct when using a reamer to finish a drilled hole to the correct size?
turn the reamer only in the cutting direction
What should be the included angle of a twist drill for hard metal?
118 degrees
What is indicated by a black 'smoky' residue streaming back from some of the rivets on an aircraft?
Fretting corrosion is occurring between the rivets and the skin.
The identifying marks on the heads of aluminum alloy rivets indicate the
specific alloy used in the manufacture of the rivets.
When an MS20470D rivet is installed, its full shear strength is obtained
by the cold working of the rivet metal in forming a shop head.
What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?
To retard age hardening
Under certain conditions, type A rivets are not used because of their
low strength characteristics
A rivet set used to drive MS20470 rivets should
have a slightly greater radius than the rivet head.
Heat-treated rivets in the D and DD series that are not driven within the prescribed time after heat treatment or removal from refrigeration
must be reheat treated before use
The dimensions of an MS20430AD-4-8 rivet are
4/16 inch in diameter and 8/32 inch long.
Which of these is not true regarding the proper use of the drill press?
leave the key in the chuck when you are done so the next person can find it easily.
When drilling large holes in metal, it is often wise to drill a smaller hole first. This hole is called a
pilot hole
In this class we will use numbered bits, and occasionally fractional bits. How do lettered bits compare to numbered bits?
They are similar, but larger.
Which of these tools can produce compound bends in parts?
slip roller
How does a mechanic usually repair a section of compound curved fuselage skin?
They use an English Wheel
What tool is best used to bend angled parts into curves?
shrinker/Stretcher
When fastening two thin sheets together, which of these should be used?
Dimple the upper and lower sheets, and drive the rivet.
When fastening a thin sheet to the top of a thick sheet, which of these should be used?
Dimple the upper sheet, and countersink the lower sheet. Then drive the rivet.
Note
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