6. Materials & hardware - Q&A
62 questions found
Browse by module
Avdel rivets are closed by
- a tapered mandrel.
- broaching.
- squeezing.
How can it be broaching instead of squeezing
What is the small hole on a swaged turnbuckle for?
- To check for moisture deposits.
- To check if correct amount of cable has been inserted before swaging.
- To alloy the turnbuckle to be wire locked.
why the answer is not to allow the turnbuckle to be wire lock?
An aluminium alloy bolt may be identified by
- its colour (dyed black).
- the letter A stamped on the head.
- its colour (dyed green).
Really?? not the letter A stamped on the head?
Which of the following are acceptable to use in cleaning anodized surfaces?
- Steel wool, aluminium wool, fibre bristle brush.
- Aluminium wool, fibre bristle brush.
- Brass wire brush, stainless steel wire brush.
Please write your question here.
Copper is an inferior conductor to aluminium when comparing
- weight for weight.
- CSA with CSA.
- load for load.
Please write your question here.
Heavy corrosion deposits on clad aluminium alloys should be removed
- mechanically using a pneumatic vibrator.
- chemically by use of trichloroethylene.
- chemically by use of phosphoric acid.
usually, in heavy deposits corrosion, the initial phase is remove the bulk with a brass wire wheel and than use the acid
Maximum repair dimensions for use of microballoons is
- 10mm.
- 20mm.
- 30mm.
why??
If the fabric on a wood/fabric aircraft has lost its strength
- the fabric can be treated with a rejuvenator
- the fabric can be treated with additional coats of the approved type of dope.
- the fabric must be replaced.
anyone can explain??
Which of the following factors must be taken into account when determining the wire size to use for an aircraft installation?
- Allowable power loss, permissible voltage drop, current carrying capability of the conductor, type of load (continuous or intermittent).
- Mechanical strength, allowable power loss, the colour coding of the wire insulation, permissible voltage drop.
- Allowable power loss, the routing clamp spacing along the harness, current carrying capability of the conductor, type of load (continuous or intermittent).
in the book where i'm studying the correct answer is the first, I have to know the amps such are flowing
Cable stops are manufactured from
- stainless steel.
- copper.
- magnesium alloy.
Can anybody please provide reference or proof of this answer?
The main reason why crimped joints are preferable to soldered joints is
- the quality of crimped joints will be constant.
- no flux is needed.
- there is no heat required.
I would say the answer should be the quality of the crimped joints will be constant? is there anything to back up the heat answer?
Surface corrosion on stainless steel is identified by
- red rust.
- white film.
- black pitting.
Why is this not Red Rust? i can find nowhere that states Surface corrosion on steel is 'Black Pitting'
Fabric rejuvenator
- penetrates the fabric and restores fungicidal resistance.
- restores fabric strength and tautness to at least the minimum acceptable level.
- restores the condition of the dope coatings.
Is this correct?
The lifting or flaking of the metal at the surface due to delamination of grain boundaries caused by the pressure of corrosion is
- exfoliation.
- electrolysis.
- transgranulation.
Why?
Where heat is likely to be transmitted through a bearing
- group 2 bearings are used.
- group 4 bearings are used.
- group 3 bearings are used.
where could i find info about groups
During a Rockwell Hardness test, what dimension is measured?
- The diameter of the indent.
- The depth of the indent.
- The diameter and depth of the indent.
isn't what we should see in the microscope is the diameter of the indent and then calculate the area, then knowing the depth?
A 0.5 in. diameter pipe is to be joined using standard nuts and fittings. What coupling would you use?
- AN8-8852-1.
- AN8-8852-2.
- AN8-8852-8.
Does the -8 mean diameter in 16th's?
If a sheet of aluminium alloy of 0.032 and 0.064 is to be joined together the rivet should be
- 0.032 plus 2D.
- 0.096 plus 1.5 D.
- 0.064 plus 1D.
explain pls
A self aligning bearing is a
- angular bearing.
- precision bearing.
- radial bearing.
Should angular not be the correct answer?
Specified time of contact between the indentor and test piece in a vickers or brinell hardness test is
- 20 seconds.
- 10 seconds.
- 15 seconds.
This question is unclear, as contact time is different depending on ferrous or non-ferrous metals.
Electrochemical reaction is caused by the contact of
- bonding.
- moisture on the surface of the metal.
- dissimilar metals.
Wouldn't C be correct as 'electrochemical' corrosion requires a anode and a cathode, where as a 'chemical' corrosion being oxidation would be moisture on the surface of the metal? Please help? Thanks.
A square around the NW digit in the quadrant of a fastner would indicate
- interference fit fastener.
- hi-lock to be used
- fluid tight fastner.
Can someone help explain quadrants of fasteners please? Thanks.
The material specifications for a certain aircraft require that a replacement oil line be fabricated from3/4 inch, 0.072 5052-0 aluminium alloy tubing. What is the inside dimension of this tubing?
- 0.688 inch.
- 0.606 inch.
- 0.750 inch.
Can someone help explain please? Thanks.
In corrosion, the electrode that loses electrons is
- the cathode.
- either the cathode or the anode depending upon the electrolyte.
- the anode.
I don't understand.
Cathode is positive and electrons are negative. How can electrons ever be attracted to anode?
A journal load is
- compression.
- radial.
- axial.
Question is a bit ambiguous! Wouldn't the direction of load be radial and the type of load be compression?