FAA O&P - A.K.

If a 2024 rivet has to be replaced with a 2117 rivet, how do you determine the size to be used

For a 5/32  or smaller diameter, use the next larger size 2117 rivet, assuming that the edge distance and spacing meet the minimum requirements

Describe the process for determining the total length of a solid rivet for a particular installation

Add the grip length ( thickness of material being joined) plus 1.5 times the rivet diameter

What is the minimum edge distance & spacing should be used for a single row of protruding head rivets

No less than two rivet diameters from the edge and not less than three rivet diameters apart

How can a mechanic determine whether the countersink for a flush rivet should be dimpled or drilled

By the thickness of the top sheet; thin sheets are dimpled with thin sheets may be countersunk

What should be done to a heat treated aluminium part after welded repairs are completed

The part must be re-heat treated

What type of flame is used when torch brazing or silver soldering?

A neutral flame

Name three principle types of welding

Gas welding, electric arc welding, and electric resistance welding

What are some advantages of gas shielded arc welding

the weld is stronger more ductile and more corrosive resistant

Which method of welding is less likely to cause buckling or warping of thin metal sheets

TIG/Electric arc welding

When an oxyacetylene torch is extinguished, which valve is turned off first

Turn the Gas (acetylene) valve off first

What is the purpose of shielding on arc weld with inert gas

The gas prevents atmospheric oxygen and/or nitrogen from contaminating the weld

When a gas welding project is completed, what safety precautions should be accomplished

Turn all of the valves off and relieve gas pressure from the system/tubes

What is a common method of controlling expansion when welding a joint

Place tack welds along the length of the joint

What is the effect of inadequate penetration on a weld

the weld will be weak

What is the purpose of the flux used with brazing and silver soldering

a neutral flame

What must be done to a soldering iron tip to increase the amount of heat transferred from the tip to the work

the tip must be cleaned and properly tinned

What is the preferred method of welding magnesium

TIG welding

What precautions must be observed in order to weld titanium

all traces of oxygen and nitrogen must be kept away from the weld area

Describe one type of repair that could be made to a dented steel tube cluster joint

a formed steel patch plate could be welded over the damaged area

How can a soft flame be obtained without reducing the heat output of the torch

using a large tip and adjust the gas pressure accordingly

What factors determine the amount of heat delivered by a gas welding torch

The size of the torch tip and the gas pressure

What should be done to a heat treated aluminium part after welded repairs are completed

the part must be re-heat treated

Welding magnesium can create a serious safety hazard. What is the nature of this hazard

magnesium burns very hot and is very hard to extinguish

What technique might be used to enable a tight-fitting inner sleeve to be inserted into a tubular repair

the inner tube could be chilled with dry ice or in a freezer while the outer tube could be heated slightly with a torch