Progressive 2 Tools and Basic Rivets
Alloy 2117 rivets are heat treated
By the manufacture and do not require heat treatment before being driven.
River pitch is the distance between the
Centers of adjacent rivers on the same row
River gauge or transverse pitch is the distance between the
Centers of rivets in adjacent rows
The aluminum alloys used in aircraft construction are usually hardened by which method?
Cold working
What is generally the best procedure to use when removing a solid shank rivet?
Drill to the base of the manufactured rivet head with a drill one size smaller than the rivet shank and remove the rivet with a punch
Drilling and reaming are the same task.
False
The currently used part number for a universal head field rivet is MS20470DD
False
Select the alternative which best describes the function of the flute section of a twist drill.
Forms the cutting edges of the drill point
The aluminum alloy sheet metal used in aircraft construction are usually hardened by which method?
Heat treatment
Why should a technician measure from an increment, such as one inch mark, and not from the end of a graduated rule?
Increased accuracy of the measurement
Which rivets should be selected to join two sheets of .032-inch aluminum?
MS20470AD-4-4
Which rivet is used for riveting nickel-steel alloys?
Monel
Are yellow handle snips designed to cut straight and long cuts?
No
Is the AC 43.13-1B/2B approved data for use in major structural repairs or alterations?
No
The length of a river to be used to join a sheet of .032 inch and .064 inch aluminum alloy should be equal to
One and one half times the river diameter plus .096 inch
You can install a MS 20470AD4-4 rivet into a hole created by a 1/8 bit
Only after reaming to .125
When riveting dissimilar metals together, what precautions must be taken to prevent an electrolytic action?
Place a protective separator between areas of potential electrical difference.
Which of the following need not to be considered when determining minimum river spacing
Rivet Length
A DD rivet is heat treated and frozen, before use to
Soften for riveting
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.
What is the minimum spacing for a single row of aircraft rivets?
Three times the diameter of the rivet shank.
What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?
To retard age hardening
Left hand cut snips are red in color.
True
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 is the minimum edge distance for aircraft rivers?
Two times the diameter of the river shank
MS20426AD-6-5 indicates a countersunk rivet which has
an overall length of 5/16 inch
A factor which determines the minimum space between rivets is the
diameter of the rivets being used.
Most rivets used in aircraft construction have
dimples
A rivet set used to drive MS20470 rivets should
have a slightly greater radius than the rivet head.
When comparing the drilling techniques for stainless steel sheet material to those for aluminum alloy sheet, it is normally considered good to drill steel at a
lower speed with higher pressure applied to the drill
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.
A properly formed shop head of a rivet should be
one and one-half times the diameter of the manufactured head of the rivet.
When an MS20470D rivet is installed, its full shear strength is obtained
only after a period of age hardening.
Mild steel rivets are used for riveting
steel parts
You can distinguish between aluminum and aluminum alloy by
testing with a 10 percent solution of caustic soda
What is the proper bit size to install a M20470AD4-4 rivet?
#30
The dimensions of an MS20430AD-4-8 rivet are
1/8 inch in diameter and 1/2 inch long.
What should be the included angle of a twisted drill for hard metal?
118 degrees
When drilling stainless steel, the drill used should have an included angle of
140 degrees
The primary alloying agent of 2024-T3 is indicated by the number
20
Which rivet may be used as received without further treatment?
2117-T3
The general rule for finding the proper rivet diameter is
3 times the thickness of the thickest sheet
A sheet metal repair is to be made using two pieces of 0.040-inch aluminum riveted together. All rivet holes are drilled for 4/32-inch rivets. The length of the rivets to be used will be
5/16 inch
The length of rivet to be chosen when making a structural repair that involves the joining of .032 inch and .064 inch aluminum sheet drilled with a No. 30 drill is
5/16 inch
Which rivet is used for riveting magnesium alloy structures?
5056 aluminum
A single-lap sheet splice is to be used to repair a section of damaged aluminum skin. If a double row of 1/8-inch rivets is used, the minimum allowable overlap will be
7/8
What are the steps to control a drill when starting a hole?
Align the drill point, turn by hand to start, trigger the drill to an initial slow speed, increase speed to complete hole.
Clad aluminum alloys are used in aircraft because they
Are less subject to corrosion than uncoated aluminum alloys.
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.
