METALLIC STRUCTURE 3

The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud length is measured in. hundredths of an inch. tenths of an inch. sixteenths of an inch.

The identifying marks on the heads of aluminum alloy rivets indicate the. degree of dimensional and process control observed during manufacture. head shape, shank size, material used, and specifications adhered to during manufacture. specific alloy used in the manufacture of the rivets.

(Refer to Figure 4.) The amount of material required to make the 90° bend is. 0.3436 Inch. 0.3717 inch. 0.3925 inch.

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

Which rivet is used for riveting magnesium alloy structures?. Mild steel. 5056 aluminum. Monel.

Which of the following can normally be welded without adversely affecting strength?. Spring steel struts or aircraft bolts. Most heat-treated steel/nickel alloy components. SAE 4130 chrome/molybdenum tubing.

(Refer to Figure 5.) What is the flat layout dimension?. 7.0 inches. 6.8 inches. 6.6 inches.

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 inch. one and one-half times the rivet diameter plus .096 inch. three times the rivet diameter plus .096 inch.

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.

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

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. 1/2 inch. 3/4 inch. 13/16 inch.

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 inch. 3/16 inch. 5/16 inch.

In gas welding, the amount of heat applied to the material being welded is controlled by the. oxygen-acetylene regulator. size of the tip opening. cutting oxygen valve lever.

When selecting a welding rod, one of the most important factors to consider is to ensure that. ferrous rods are used on aluminum. the proper AMS number is used. nonferrous rods are used on steel.

The purpose of a joggle is to. allow clearance for a sheet or an extrusion. increase obstruction for a sheet or an extrusion. decrease the weight of the part and still retain the necessary strength.

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.

Acetylene at a line pressure above 15 psi is. dangerously unstable. used when a reducing flame is necessary. usually necessary when welding metal over 3/8-inch thick.

The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in. tenths of an inch. hundredths of an inch. sixteenths of an inch.

Which of the following is one advantage of HI-LOK fasteners?. Shorter transition area between the shank and thread. External counterbore at the base to accommodate material thickness. Inability to be over-torqued.

Which statement best describes magnesium welding?. It has low thermal conductivity, so distortion and cracking rarely occur. It is recommended to use larger welding beads and a slower welding speed than normal. It can be welded successfully using the same type of joints that are used for aluminum.

Repairs or splices involving stringers on the lower surface of stressed skin metal wings are usually. not permitted. permitted only if the damage does not exceed 6 inches in any direction. permitted but are normally more critical in reference to strength in tension than similar repairs to the upper surface.

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

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 ot consecutive rivet heads wil be tipped in the same direction.

When a piece of aluminum alloy is to be bent using a minimum radius for the type and thickness of material,. the piece should be bent slowly to eliminate cracking. the layout should be made so that the bend will be 90° to the grain of the sheet. less pressure than usual should be applied with the movable (upper) clamping bar.

Shallow scratches in sheet metal may be repaired by. burnishing. buffing. stop drilling.

Mild steel rivets are used for riveting. nickel-steel parts. magnesium parts. steel parts.

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.

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.

The oxyacetylene flame for silver soldering should be. oxidizing. neutral. carburizing.