Metallic Structures Q1

(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.