Airframe Mechanic Sheet Metal Structural Repairs Questions and Answers

Question 1

When performing a sheet metal repair, what is the primary purpose of stop-drilling the ends of a crack?

Accepted Answer

To relieve stress and prevent the crack from propagating.

Answer

To provide a starting point for a saw or file.

Answer

To mark the location of the crack for inspection.

Answer

To create a hole for a temporary fastener.

Question 2

An aircraft structural repair requires the use of 2024-T4 aluminum alloy rivets. How should these rivets be handled immediately after heat treatment and before driving?

Accepted Answer

They must be driven within 10 to 20 minutes or stored in a refrigerator.

Answer

They can be used at any time after cooling to room temperature.

Answer

They should be heated again immediately before driving.

Answer

They must be allowed to age-harden for 24 hours at room temperature.

Question 3

A mechanic is calculating the proper length for a solid shank universal head rivet. The total thickness of the material being joined is 0.125 inches, and the rivet diameter is 1/8 (0.125) inches. According to the general rule, what should be the total length of the rivet?

Accepted Answer

0.21875 inches

Answer

0.250 inches

Answer

0.1875 inches

Answer

0.3125 inches

Question 4

Which of the following describes the minimum allowable edge distance for a single row of protruding head rivets in a sheet metal repair?

Accepted Answer

Two times the rivet shank diameter

Answer

One times the rivet shank diameter

Answer

Three times the rivet shank diameter

Answer

One and a half times the rivet shank diameter

Question 5

In the context of an aircraft sheet metal repair, what is the primary function of a joggle?

Accepted Answer

To allow one sheet of metal to overlap another while maintaining a flush surface.

Answer

To increase the thickness of the material for added strength.

Answer

To create a decorative finish on the repair patch.

Answer

To provide a space for electrical wiring to pass through.

Question 6

When laying out a multi-row rivet pattern for a repair, the distance between the centers of rivets in adjacent rows is known as what?

Accepted Answer

Transverse pitch

Answer

Rivet pitch

Answer

Edge distance

Answer

Grip length