TALLER 3

A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is in the. number of locking collar groves. shape of the head. method of instalation.

Alloy 2117 rivets are heat treated. by the manofacturer and no require heat tratament before being driven. by the manofacturer but no require reheat tratament before beiing driven. to a temperature to 910-93°F and quenched in cold water.

the general rule for finding the proper rivetdiameter is. three times the thickness of the material to be joined. two times the rivet lenght. three times the thickness of the thickness sheet.

the shop head of a rivet shoul be. one and one half times the diameter of the rivet shank. one half the diameter of the rivet shank. one and one half times the diameter of the manofactured head of the rived.

one of the main adventages of hi-lok type fastenersn over earlier generations is that. they can be removed and rused again. the squeezed on collarinstalation providesa more secure tighters fit. they can be installed with ordinart hand tools.

Threaded rivets (Rivnuts) are commonly used to. join two or more pieces of sheet metal where shear strench is desired. attach parts or components with screws to sheet metal. join two or more pieces of sheet metal where bearing strench is desired.

The installation of Cherrymax and Olympic-Lok rivets is accomplished by utilizing. rivet gun, special rivet set and bucking bar. a pulling tool. ordinary hand tools.

Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the. posibility of causing delamination. increased posibility of fretting corrosion in the fastener. dificulting on forming shop head.

1) When performing a ring (coin tap) test on composite structures, a change in sound may be due to damage or to transition to a different internal structure. (2) The extent of separation damage in composite structures is most accurately measured by a ring (coin tap) test. Regarding the above statements,. 1 and 2 are true. only 1 is true. only 2 is true.

a single lap sheet splice is to be used to repair a section of damaged aluminium skin. if a double row of 1/8 inch rivets is used the minimun allowable overlap will be. 1/2 inches. 3/4 inches. 13/16 inches.

Which statement is true regarding the inspection of a stressed skin metal wing assembly known to have been critically loaded?. rivet show no visible distortion , further investigation is unnecesary. if bearing failure has ocurred, the rivet shanks will be joggled. if genuine rivet tipping has ocurred groups of consecutive rivets head will be tipped in the same direction.

hat 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.

When drilling stainless steel, the drill used should have an included angle of. 90 degrees and turn at low speed. 118 degrees and turn at hight speeds. 140 degrees and turn at a low speed.

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.

(Refer to Figure 1.) Which of the rivets shown will accurately fit the conical depression made by a 100° countersink?. 1. 2. 3.

Which is correct concerning the use of a file?. apply pressure on the forward stroke, only, excep when filling very soft metals such as lead or aluminium. a smpther finish can be obtained by using a double cut file than by using a single cut file. the terms duble - cut and second-cut have the same meaning in reference to files.

What is one of the determining factors which permits machine countersinking when flush riveting?. thickness of the material and rivet diameter are the same. thickness of the material is less than the tickness of the rivet head. thickness of the material is greater than the tickness of the rivet head.

When repairing a small hole on a metal stressed skin, the major consideration in the design of the patch should be. the shear strench of the riveted join. to use rivet spacing similar to a seam in the skin. that the bond between the patch and the skin is suficient to prevent disimilar metal corrsion.

A factor which determines the minimum space between rivets is the. length of the rivets being used. diamter of the rivets being used. thicness of the material being rivet.

Rivet gauge, or transverse pitch is the distance between the. centers of rivets in adjacent rows. centers of adjacent rivets in the same row. heads of rivets in the same row.

Rivet pitch is the distance between the. centers of rivets in adjacent rows. center of adjacen rivets in the same row. heads of the rivets in the same row.

(Refer to Figure 2.) Select the preferred drawing for proper countersinking. all are aceptable. 2. 1.

What is indicated by a black 'smoky' residue streaming back from some of the rivets on an aircraft?. the rivets ehere excesively work hardened during instalation. exfoliation corrosion is ocurring iside the structure. fretting corrosion is ocurring between rivets and the skin.

The identifying marks on the heads of aluminum alloy rivets indicate the. degree of dimensional and process control observed during manofacture. head shape,shan size, material used and specificationsadhered during manofacture. specific alloy used un the in the manofacture of the rivets.

When an MS20470D rivet is installed, its full shear strength is obtained. only during a period of age hardering. by the cold working of rivet metal in forming a shop head. by head trating just prior to being driven.

Which of the following need not be considered when determining minimum rivet spacing?. rivet diameter. rivet length. tipe o material being riveted.

What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?. to acelerate age hardering. to relieve internal stresses. to retard age hardering.

Under certain conditions, type A rivets are not used because of their. low strench caracteristics. hight alloy content. tendency toward embrittlement when subjeted to vibration.

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. must be discarted. must be returned to refrigerationand use later without reheat treatament.

A rivet set used to drive MS20470 rivets should. have the same radius as the rivet head. have a slightly greater radius as the rivet head. be nearly flat on the end with slight radius on the edge yo prevent to the sheet being riveted.

The dimensions of an MS20430AD-4-8 rivet are. 1/8 inch diameter 1/4 inch long. 1/8 inch diameter 1/2 inch long. 4/16 inch diameter 8/32 inch long.

A sheet metal repair is to be made using two pieces of 0.040-inch aluminum riveted together. All rivet holes are drilled for 3/32-inch rivets. The length of the rivets to be used will be. 1/8 inches. 1/4 inches. 5/16 inches.

Most rivets used in aircraft construction have. dimples. smooth heads without marking. a rised dot.

Which rivet may be used as received without further treatment?. 2024-T4. 2117-T3. 2017-T3.

(Refer to Figure 3.) Which is the grip length of the flush rivet?. 1. 2. 3.

Which rivets should be selected to join two sheets of .032-inch aluminum?. MS20425D-4-3. MS20470A-4-4. MS20455DD-5-3.

A sheet metal repair is to be made using two pieces of 0.0625-inch aluminum riveted together. All rivet holes are drilled for 1/8-inch rivets. The length of the rivets to be used will be. 5/32. 3/16. 5/16.

Mild steel rivets are used for riveting. Nickel-stell parts. Magnesium parts. Stell parts.

A MS20426AD-6-5 indicates a countersunk rivet wich has. a shank length of 5/16 inch (excluding head). a shank length of 5/32 inch (excluding head). an overal length of 5/16 inch.

A DD rivet is heat treated before use to. harden and icrease strench. relieve internal stresses. soften to facilitate riveting.

When riveting dissimilar metals together, what precautions must be taken to prevent an electrolytic action?. treat the surfaces to be riveted together with a process called anodic treatament. place a protective separator between areas of potential electrical difference. avoid the useof the dissimilar metal by the redissigning the unit according to the recomendations out lined in ac 43.13-1A.

The length of a rivet to be used to join a sheet of .032-inch and .064-inch aluminum alloy should be equal to. two times the rivet diameter plus.064 inchs. one and one half times the rivet diameter plus 0.96 inchs. three times the rivet diameter plus 0396 inchs.

What is generally the best procedure to use when removing a solid shank rivet?. drill throught the manofactured head and shank with a shank size drill and remove the rivet with a punch. drill to the base of the manofactured rivet head with a drill one size smaller than the rivet shank and remove the rivet with a punch. drill throught the manofactured head and shank with a drill one size smaller than the rivet and remove the rivet with a punch.

Joggles in removed rivet shanks would indicate partial. bearing failure. torsion failure. shear failure.

What type loads cause the most rivet failures?. shear. bearing. head.

Which rivet is used for riveting magnesium alloy structures?. mild steel. 5056 aluminium. monel.

Which rivet is used for riveting nickel-steel alloys?. 2024 aluminium. mild steel. monel.

The solid aluminum alloy rivet recommended for magnesium skin is made of alloy__________ . 5056-T. 223-T.

The rivet to use for joining two sheets of metal should have a diameter at least ________times the thickness of the thickest sheet being joined. Three. Six.

The distance between the center of the rivet holes in a single row of rivets is called the rivet ________ . rivet pitch. rivet tolerance.

When a single row of MS 204 70AD-4 rivets is laid out, the center of the holes should be no closer than_______ inch and no farther apart than __________ inches. 3/8, 1/8. 1/8, 2/4.

When laying out a two-row riveted seam, the rivet pitch is 1/2 inch, and the transverse pitch, or gage, should be _____inch. 3/8. 8/3.

When making a rivet seam using MS20470AD-3 rivets, make sure that the center of the rivet holes is no closer to the edge of the sheet than _____________inch. 0.25 inch. 138 inch.

A riveted joint should be designed so it will fail in __________. bearing. shear.

When a rivet pattern is laid out on a piece of aluminum alloy, the marks can be made with a/an _______________. fine sharpie type permanent marker. graphite pencil.

The correct size drill to use for a 1/8-inch rivet is a number _____. 40. 04.

Pilot holes for 1/8-inch rivets should be made with a number ______ drill. 30. 03.

The determination to countersink or dimple a skin in preparation for flush riveting is determined by the__________ of the skin. thickness. strench.

Two methods of dimpling are: A. Radius B. Coin. A. Radius B. bending.

Hot, or thermal, dimpling is a form of _______ dimpling using heated dies. coin. radius.

The inside radius of a rivet set should be slightly ___________ than the radius of the head of the rivet. larger. smaller.

The shank of a rivet should stick out of the sheet by __________ times the rivet shank diameter. one and one half. one half.

A properly formed shop head on a rivet should have a diameter of ______ times the diameter of the rivet shank. one and one half. one half.

A properly formed shop head on a rivet should have a thickness of _________ of the rivet shank diameter. one half. one and one half.

The shop head of a rivet driven by the NACA flush rivet procedure is shaved flush with the skin with a ____________. universal head. round head.

When riveting by the team method when it is impossible to see the person holding the rivet gun, the bucker indicates a good rivet by tapping on the rivet _____ time/times. one. one half.