Dgca Module 06 Part 01

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e l b a l i a v A P Q m a x E e l u d o M 6 6 R A C l l A ( s r e p a P n o i t s e u Q A C G D / b f @ k o o b e c a F n o s u e k i L , ) n i . s r e p a p n o i t s e u q a c g d . w w w (

1 e g a P

01a. Aircraft Materials - Ferrous.

Option A.

greater brittleness.

Option B.

greater hardness.

Option C.

relief of internal stress after

hardening. Correct Answer is.

relief of internal stress

after hardening. Question Number.

1.

When drilling

Tempering is done to relieve

internal stresses.

stainless steel, use a. Option A.

Explanation.

drill ground to 120 °, slow cutting

speed. Option B.

drill ground to 90 °, fast cutting

Question Number.

5.

The addition of

chromium to steel will produce.

speed. Option C.

drill ground to 90 °, slow cutting

speed. Correct Answer is.

drill ground to 120 °, slow

toughness.

Option B.

hardness.

Option C.

ductility.

Correct Answer is.

cutting speed. Explanation.

Option A.

Explanation.

NIL.

hardness.

Chromium is alloyed with steel to

make it harder. Question Number.

2.

How is a material Question Number.

galvanised?. Option A.

Sprayed with nickel solution.

to plain carbon steel.

Option B.

Packed in a drum containing zinc

Option A.

6.

Chromium added

increases it's resistance to

dust and heated.

corrosion.

Option C.

Option B.

turns it into a non-ferrous alloy.

Option C.

makes the metal softer.

Dipped in a bath of molten zinc.

Correct Answer is.

Dipped in a bath of molten

Correct Answer is.

zinc. Explanation.

increases it's resistance to

corrosion.

NIL.

Explanation.

Chromium, when added to steel

increases its hardness and corrosion resistance Question Number.

3.

What temperature

(hence CRS).

would steel be tempered at?. Option A.

At the annealing temperature.

Option B.

Above the annealing temperature.

Question Number.

7.

The purpose of

case hardening is to. Option C.

Below the annealing temperature.

Option A.

produce a hard case over a tough

core. Correct Answer is.

Below the annealing

temperature. Explanation.

Option B.

reduce the carbon in the steel.

Option C.

introduce carbon into the steel.

Correct Answer is.

NIL.

produce a hard case over a

tough core. Explanation. Question Number.

4.

Tempering steel

Case hardening hardens the

surface only.

gives.

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Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Question Number. e l b a l i a v A P Q m a x E e l u d o M 6 6 R A C l l A ( s r e p a P n o i t s e u Q A C G D / b f @ k o o b e c a F n o s u e k i L , ) n i . s r e p a p n o i t s e u q a c g d . w w w (

2 e

Question Number.

8.

At normal

12.

With respect to

ferrous metals which of the following is true?.

temperatures HC steel is harder because. Option A. Option A.

it has more austenite.

metals.

Option B.

of the % of carbon in the granules.

Option B.

Iron is not any element of ferrous Iron is a main element and most

ferrous metal are magnetic. Option C.

it has less austenite.

Correct Answer is.

of the % of carbon in the

Iron is a main element and ferrous

metals are not magnetic. Correct Answer is.

granules. Explanation.

Option C.

NIL.

Iron is a main element and

most ferrous metal are magnetic. Explanation.

The Latin for iron is 'Ferrum'

Ferrous metals are named thus, and most are Question Number.

9.

Nitriding is.

paramagnetic with the exception of some stainless steels.

Option A.

tempering.

Option B.

anodising.

Option C.

case hardening.

Correct Answer is. Explanation.

Question Number.

case hardening.

13.

The annealing

process on steel is required sometimes as it.

Nitriding is a form of case Option A.

hardening.

provides a corrosion resistant layer

that prevents oxidation. Option B. Question Number.

10.

Medium carbon

allows the material a greater stress

per unit area.

steels have a carbon content of.

Option C.

Option A.

0.3 - 0.5 %.

after engineering processes.

Option B.

0.5 - 0.8 %.

Correct Answer is.

Option C.

0.8 - 1.05 %.

suffered after engineering processes.


0.3 - 0.5 %.

Medium carbon steel is 0.3 - 0.6%

Explanation.

relieves internal stress suffered relieves internal stress

Annealing is to relieve internal

stresses.

(approx). FAA AC43 4-1. Question Number. Question Number.

11.

A ferrous metal

14.

on the Brinell test would have a BHN number between.

contains. Option A.

aluminium.

Option A.

100 to 175.

Option B.

iron.

Option B.

300 to 400.

Option C.

magnesium.

Option C.

600 to 700.


Cobalt steel tested

iron.

Ferrous' is from the Latin for iron.


600 to 700.

Cobalt steel (used in cobalt drills)

has a very high hardness (600-700 BHN or 60-65 Rockwell C). BL/10-3.

g a P




3 e g a P

15.

If a material is

Option A.

found to be in the tertiary phase of creep the

cooling.

following procedure should be implemented:.

Option B.

heating under the UCP and slow heating over the UCP and fast

cooling. Option A.

The component should under go

dye penetrant process and condition monitored.

Option C.

heating over the UCP and slow

cooling. Correct Answer is.

Option B.

The crack should be stop drill,

heating under the UCP and

slow cooling.

condition monitoring should be applied.

Explanation.

Option C.

the Lower Critical Temperature (LCT) and cool

The component should be

replaced immediately. Correct Answer is.

To temper steel, heat to BELOW

either slowly or quench in water. The component should be

replaced immediately. Explanation.

The tertiary phase of creep occurs

Question Number.

19.

Austenitic

just before complete failure of the component.

stainless steels are.

BL/10-3 3.11.3.

Option A.

magnetic.

Option B.

non-magnetic.

Option C.

hardened by heat treatment.

Question Number.

16.

What is used for

Correct Answer is.

marking out steels?.

Explanation.

Option A.

Engineers blue.

magnetic.

Option B.

Wax crayon.

Option C.

Copper sulphate.


Copper sulphate.

Copper sulphate is used for

non-magnetic.

Austenitic stainless steel is non-

Question Number.

20.

The formation of

steel depends upon.

marking steel. Workshop Technology Part 1 Pg

Option A.

209.

austenite. Option B.

the formation of pearlite into the formation of austenite into

pearlite. Question Number.

17.

Phosphating of

Option C.

the presence of pearlite in the

steels is carried out by immersing the steel in to a

structure.

solution of.

Correct Answer is.

Option A.

phosphoric acid and metal

phosphates.

into pearlite. Explanation.

Option B.

nitric acid and sulphur.

Option C.

metal phosphates and sulphuric

the formation of austenite

Austenite exists above the LCT and

turns into pearlite as the steel cools.

acid. Correct Answer is.

phosphoric acid and metal

21.

How is residual

magnetism removed after an NDT examination?.

phosphates. Explanation.

Question Number.

CAIPs BL/7-4 1.1.

Question Number.

18.

Tempering entails.

Option A.

EMI.

Option B.

EMC.

Option C.

Degaussing.

Correct Answer is.

Degaussing.



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4 e g a P

Degaussing is another name for Question Number.

demagnetising.

25.

When normalising,

the material is. Question Number.

22.

The hardness of

Option A.

quenched immediately.

Option B.

left to cool in room temperature.

Option C.

cooled slowly.

steel depends upon. Option A.

formation of pearlite into

Correct Answer is.

austenite. Option B.

formation of cementite.

temperature.

Option C.

the iron austenite grain structure.

Explanation.


left to cool in room

Cool in air when normalising.

formation of cementite.

Cementite (iron carbide) is the

hard grain structure that precipitates from the

Question Number.

26.

Cast iron is.

austenite as high carbon steel cools from above the UCT.

Question Number.

23.

The difference

between annealing and normalizing is. Option A.

Option A.

very malleable.

Option B.

tough.

Option C.

heavy and brittle.


heavy and brittle.

NIL.

both are heated above the UCT,

cool slowly to anneal, cool in air to normalize. Option B.

both are heated below the UCT,

Question Number.

27.

Case hardening

cool in air to anneal, cool slowly to normalize.

can be carried out on.

Option C.

Option A.

titanium.

cool in air to anneal, cool slowly to normalize.

Option B.

any ferrous metal.

Correct Answer is.

Option C.

duralumin.

both are heated above the UCT, both are heated above the

UCT, cool slowly to anneal, cool in air to normalize.


Explanation.

any ferrous metal.

NIL.

Both are heated above the UCT,

but the only difference is, cool slowly (in the furnace) to anneal, cool in air to normalize.

Question Number.

28.

Exhaust systems

are usually made from stainless steel which is susceptible to. Question Number.

24.

Normalizing of

steel is done to. Option A.

remove residual stress of the

Option A.

surface corrosion.

Option B.

filiform corrosion.

Option C.

intergranular corrosion.

manufacturing process.

Correct Answer is.

Option B.

make steel softer.

Explanation.

Option C.

restore the fatigue life of steel.

Correct Answer is.

intergranular corrosion.

NIL.

remove residual stress of

the manufacturing process.

Question Number.

Explanation.

heated slightly above its critical temperature and

NIL.

29.

When metal is first



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5 e g a P

then cooled rapidly it is common that the metal

Question Number.

33.

After a product

will increase in.

has been manufactured and all heat treatment has

Option A.

brittleness.

been carried out the stress remaining if any is

Option B.

both of the above.

termed as.

Option C.

hardness.

Option A.

residual stress.

Option B.

working stress.

Option C.

applied stress.


both of the above.

This is the process of hardening

Correct Answer is.

(ferrous) metals.

Explanation. Question Number.

30.

Steel is tempered.

Option A.

after hardening.

Option B.

before hardening.

Option C.

to increase hardening.


after hardening.

Tempering is to reduce the

brittleness caused by hardening.

residual stress.

NIL.

http://www.physiqueindustrie.com/residu

al_stress.php

Question Number.

34.

Annealing steels.

Option A.

toughens the metal.

Option B.

makes the metal malleable.

Option C.

makes the metal brittle.

Correct Answer is.

makes the metal

malleable. Question Number.

31.

If a steel

component is operated below the fatigue limit.

Explanation.

A&P Technician General Textbook

Chap 7 page 3.

The fatigue life is. Option A.

finite.

Option B.

infinite.

Question Number.

Option C.

depend on its proof stress.

hardened steel is carried out to.


Option A.

infinite.

35.

Tempering of

retain surface hardness, but soften

the core.

NIL.

http://metals.about.com/library/bldef-

Fatigue-Limit.htm

Option B.

retain core hardness, but soften

the surface. Option C.

significantly reduce the brittleness

without suffering a major drop in its strength. Question Number.

32.

A low carbon steel

would normally be case hardened using.

Correct Answer is.

significantly reduce the

brittleness without suffering a major drop in its strength.

Option A.

the nitriding process.

Option B.

flame or induction hardening.

Option C.

pack or gas carburising.


pack or gas carburising.

NIL.

http://www.efunda.com/processes/heat_t

reat/hardening/diffusion.cfm

Explanation.

NIL.

Question Number.

36.

High speed steel

relies heavily on the following metallic element for its ability to cut other metals, even when it is heated to a dull red colour. Option A.

Tungsten.

Option B.

Nickel.



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6 e g a P

Vanadium.


Tungsten.

Question Number.

37.

When a low

Option A.

tough.

Option B.

heavy and brittle.

Option C.

very malleable.

carbon steel bolt is stretched beyond its elastic

Correct Answer is.

limit without breaking, it will.

Explanation.

Option A.

deform temporarily.

Option B.

become more ductile.

Option C.

deform permanently.

Correct Answer is.

deform permanently.

heavy and brittle.

NIL.

Question Number.

42.

Austenitic steel is

produced when the material is heated to.

NIL.

Question Number.

38.

1% Nickel, 1%

Option A.

above the Upper Critical Point.

Option B.

above the Lower Critical Point.

Option C.

below the Upper Critical Point.

Carbon, steel is widely used for.

Correct Answer is.

Option A.

exhaust valves.

Point.

Option B.

ball and roller bearings.

Explanation.

Option C.

high tensile steel bolts.


Cast iron is.

NIL.

Question Number.

Explanation.

41.

above the Upper Critical

NIL.

ball and roller bearings.

NIL.

Question Number.

43.

Steel is produced

by refining pig iron where air/oxygen is blown through the molten material to remove. Option A.

carbon.

may be defined as.

Option B.

oxides.

Option A.

Option C.

sulphur.

Question Number.

39.

Fatigue failure

failure caused by stress in excess

of the material U.T.S.

Correct Answer is.

Option B.

failure due to impact.

Explanation.

Option C.

reduction in strength due to

Air is to 'decarburise' the pig iron.

http://www.bsu.edu/web/acmaassel/steel

.html

alternating loads. Correct Answer is.

carbon.

reduction in strength due

to alternating loads. Explanation.

NIL.

Question Number.

44.

During a Rockwell

Hardness test, what dimension is measured?. Question Number.

40.

Normalising steels.

Option A.

The diameter of the indent.

Option B.

The depth of the indent. The diameter and depth of the

Option A.

increases toughness.

Option C.

Option B.

increases the hardness.

indent.

Option C.

relieves the stresses.

Correct Answer is.


The depth of the indent.

relieves the stresses.

NIL.




7 e g a P

NIL.

Option A.

http://www.qcplus.co.uk/training/training

-rockwell.htm

the material is pulled to limit of

elasticity. Option B.

the material is pulled to until it

breaks. Option C. Question Number.

45.

What does the 0 in

the material is pulled until it

reaches its UTS.

2024-T3 mean?.

Correct Answer is.

Option A.

until it breaks.

The percentage of impurities in the

alloy.

Explanation.

Option B.

The alloy has not been modified.

Option C.

The alloy has been modified.

Correct Answer is.

The alloy has not been

modified. Explanation.

the material is pulled to

The material is tested to full

destructions.

Question Number.

2.

Impact resistance

measures the. NIL.

http://www.jjjtrain.com/vms/engineering_

metal_stds.html#6

Option A.

material toughness.

Option B.

material hardness.

Option C.

material ductility.

Correct Answer is. Explanation. Question Number.

46.

material toughness.

Toughness' is resistance to impact.

In most aircraft

hydraulic systems, two-piece tube connectors consisting of a sleeve and a nut are used when a tubing flare is required. The use of this type of

Question Number.

connector eliminates.

contact between the indentor and test piece in a

Option A.

vickers or brinell hardness test is.

the flaring operation prior to

assembly.

3.

Option A.

20 seconds.

Option B.

10 seconds.

thickness by wiping or ironing during the

Option C.

15 seconds.

tightening process.

Correct Answer is.

Option C.

Explanation.

Option B.

the possibility of reducing the flare

wrench damage to the tubing

Specified time of

15 seconds.

CAIPs BL/10-3 5.2.8.

during the tightening process. Correct Answer is.

the possibility of reducing

the flare thickness by wiping or ironing during the

Question Number.

tightening process.

test the striking energy of the striker is

Explanation.

approximately.

With the two-piece fitting (AN818)

there is no relative motion between the fitting and

Option A.

150 J.

the flare when the nut is being tightened.

Option B.

163 J.

Option C.

300 J.

01b. Aircraft Materials - Ferrous.


Question Number. strength test.

1.

4.

In an Izod impact

163 J.

CAIPs BL/10-3 6.2.

In the tensile Question Number.

5.

The Charpy test

measures.



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8 e g a P

Option A.

strain.

Option C.

Option B.

impact energy.

Correct Answer is.

Impact Resistance Test.

Option C.

Young's modulus.

Explanation.

http://www-


impact energy.

NIL.

materials.eng.cam.ac.uk/mpsite/properties/nonIE/toughness.html

NIL.

Question Number.

Fatigue Testing.

6.

The 'Fatigue limit'

for steel is generally in the region of, compared to

Question Number.

10.

Which of the

folllowing are all hardness testing machines?.

the static U.T.S. Option A.

40%-60%.

Option A.

Rockwell, Brinell and Izod.

Option B.

60%-80%.

Option B.

Rockwell, Vickers and Izod.

Option C.

20%-40%.

Option C.

Rockwell, Brinell and Vickers.

Correct Answer is.

20%-40%.

Correct Answer is.

Explanation.

http://www.key-to-

Vickers.

NIL.

Explanation.

steel.com/Articles/Art137.htm

Rockwell, Brinell and

Standard Aviation Maintenance

Handbook Page 4-11. Question Number.

7.

The ability of mild

02a. Aircraft Materials - Non-Ferrous.

steel to accept more load after the yield point is reached is due to. Option A.

necking.

Question Number.

Option B.

strain hardening.

mixture for a salt bath operation is.

Option C.

plasticisation.

Option A.


strain hardening.

NIL.

1.

The most suitable

20% nitrate of soda and 80%

sodium nitrate. Option B.

90% nitrate of soda and 10%

sodium nitrate. Option C. Question Number.

8.

What is a Rockwell

70% sodium chlorate and 30%

sodium nitrate.

tester used for?.

Correct Answer is.

Option A.

Hardness Testing.

10% sodium nitrate.

Option B.

Tensile Testing.

Explanation.

Option C.

Fatigue Testing.


BL/9-1 12.

Hardness Testing.

NIL.

Question Number.

http://www.qcplus.co.uk/training/training

-rockwell.htm

Question Number.

90% nitrate of soda and

9.

What type of test

involves using a weighted pendulum to strike a

2.

How many times

can clad alloy be heat treated?. Option A.

Once only.

Option B.

3 times.

Option C.

as many times as required.


3 times.

NIL.

material until fracture?. Option A.

Hardness Test.

Option B.

Impact Resistance Test.




9 e g a P

3.

The symbol 'W' on

Option C.

oxidise and become stronger.

a material indicates.

Correct Answer is.

Option A.

electrically insulated.

it is for use on aircraft mainplanes

Explanation.

only. Option B.

oxidise and become

Oxides of all metals are insulators.

it has been solution treated and

will respond effectively to precipitation tr eatment. Option C.

it is for workshop use only.

Correct Answer is.

it has been solution

treated and will respond effectively to

Question Number.

7.

What care should

you take with 2024-T3?. Option A.

Do not scratch or make nicks in it.

Option B.

Do not bend at sharp angles.

Option C.

Do not remove the surface of the

precipitation treatment. Explanation.

NIL.

sheet metal. Question Number.

4.

For a particular

Correct Answer is.

metal material, what conditions are best to

nicks in it.

minimise creep?.

Explanation.

Option A.

Low stress, low temperature.

resistance.

Option B.

Low stress, high temperature.

Option C.

High stress, low temperature.

Correct Answer is.

Low stress, low

temperature. Explanation.

2024-T3 has a low fatigue

Question Number.

8.

Composition of

silver solder is. NIL.

Question Number.

5.

What is the effect

of precipitation heat treatment on aluminium?.

Option A.

tin and lead.

Option B.

tin, lead and silver.

Option C.

tin, lead, silver and antimony.

Correct Answer is.

tin, lead, silver and

antimony. Explanation.

Option A.

Do not scratch or make

BL/6-1 Table 3.

It speeds up age hardening

process. Option B.

It delays the age hardening It softens the material to allow it

to be worked. Correct Answer is.

It speeds up age hardening

process. Explanation.

9.

If aluminium alloy

is not quenched within the minimum time allowed

process. Option C.

Question Number.

after heat treatment is it will be. Option A.

subject to corrosion.

Option B.

malleable.

Option C.

brittle.

Correct Answer is.

NIL.

Explanation.

brittle.

If al. alloy is not quenched, the

copper precipitates and it remains hard and brittle. Question Number.

6.

Aluminium

exposed to air will. Option A.

oxidise and become weaker.

Option B.

oxidise and become electrically

insulated.




0 1 e g a P

10.

Anodizing protects

alloy metal from corrosion and does what else?.

Question Number.

14.

Precipitation

treating makes the metal. Option A.

Seals the surface from moisture.

Option A.

Precipitation treating makes the

metal. Option B.

Makes a good surface for paint to

adhere to. Option C.

Option B.

less strong and hard.

Option C.

harder, stronger and less ductile.

Makes the surface alkaline.

Correct Answer is.

Makes a good surface for

Correct Answer is.

paint to adhere to.

ductile.

Explanation.

Explanation.

NIL.

Question Number.

11.

If caustic soda

harder, stronger and less

NIL.

Question Number.

15.

A material has the

turns a material black what is it?.

code 2024-TH6 on it. Which part of t he code

Option A.

Aluminium alloy.

indicates the percentage of the alloying element?.

Option B.

Alclad.

Option C.

Aluminium.

Option A.

H.

Aluminium alloy.

Option B.

20.

Caustic soda turns al.alloy black,

Option C.

6.


Correct Answer is.

and pure aluminium white.


12.

20.

NIL.

What chemical is

used to identify aluminium alloys?.

Question Number.

Option A.

Caustic soda.

primarily with magnesium is numbered.

Option B.

Copper sulphate.

Option A.

2025.

Option C.

Nitric acid.

Option B.

5025.

Option C.

1025.


Caustic soda.

Caustic soda turns al.alloy black,

Explanation.

and pure aluminium white.

Question Number.

13.

Correct Answer is.

Pure aluminium is.

16.

Aluminium alloyed

5025.

NIL.

Question Number.

17.

Heat treatment is

shown on a British aluminium alloy by a. Option A.

highly resistant to corrosion.

Option B.

not resistant to corrosion.

Option A.

letter and number code.

Option C.

reasonably resistant to corrosion.

Option B.

number code.

Option C.

letter code

Correct Answer is.

highly resistant to

Explanation.

corrosion. Explanation.

Correct Answer is.

letter code

BL/9-1 16.2.

Pure aluminium is highly resistant

to corrosion.




1 1 e g a P

18.

Non heat treatable

Option C.

a series of numbers.

Correct Answer is.

materials. Option A.

cannot be hardened.

Option B.

can be hardened by strain

Explanation.

a series of letters.

CAIP BL/9-1.

hardening or cold working. Option C.

can be hardened by annealing.

Correct Answer is.


Question Number.

22.

In a sheet metal

store the following is marked on a sheet of

hardening or cold working.

aluminium alloy: L162 (sheet 1). , On a different

Explanation.

sheet the following marking is found: L172 (sheet

All materials but a few (eg lead)

can be hardened by cold working.

2). The following is true: Option A.

Sheet one has a shinier surface

than sheet 2. Question Number.

19.

Which of the

Option B.

Sheet one is more ductile than

following metals is an aluminium silicon alloy used

sheet 2.

mainly for casting?.

Option C.

Option A.

Alclad.

than sheet 1.

Option B.

Aldrey.

Correct Answer is.

Option C.

Alpax.

than sheet 2.


Explanation.

Alpax.

Trade name for material used

Sheet two is of a thicker gauge Sheet one is more ductile

The L numbers are the British al.

alloy specs.

mainly for castings. Low density and corrosion resistance. 87 % Aluminium 13 % Silicon.

http://www.glue-it.com/model-

Question Number.

23.

Cold working of a

engineering/general-

material is used to reduce.

information/glossary/a_summ.htm

Option A.

material hardness.

Option B.

fatigue.

Option C.

wear of manufacturing tools.

Question Number.

20.

Aircraft skin is

provide smooth airflow at faying

Explanation.

Cold working increases strength

and hardness (therefore reduces wear).

surfaces. Option B.

make a frame lighter but stronger.

Option C.

conform to the aircraft contour.

Correct Answer is.

provide smooth airflow at

faying surfaces. Explanation.

wear of manufacturing

tools.

joggled to. Option A.

Correct Answer is.

A joggle makes a flush surface at a

join.

Question Number.

24.

Sheet metal

should be stored. Option A.

above 25 degrees centigrade.

Option B.

on its edge in racks to prevent

scratching. Option C.

stacked flat to prevent bending of

sheets. Question Number.

21.

The British system

Correct Answer is.

of heat treatment codes is.

prevent scratching.

Option A.

a series of letters.

Explanation.

Option B.

numbers and letters.

on its edge in racks to

CAAIPs Leaflet 1-8.



Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Correct Answer is. e l b a l i a v A P Q m a x E e l u d o M 6 6 R A C l l A ( s r e p a P n o i t s e u Q A C G D / b f @ k o o b e c a F n o s u e k i L , ) n i . s r e p a p n o i t s e u q a c g d . w w w (

2 1 e g a P

Question Number.

25.

Clad aluminium

alloy (alclad) has a pure aluminium coating of.

Corrosion resistant and

low expansion coefficient. Explanation.

Nickel and chromium are the

alloying elements in Stainless Steel. Option A.

0.002.

Option B.

1% of alloy thickness.

Option C.



Question Number.

29.

Titanium alloys.


The cladding is 5% each side.

Option A.

are cheap to manufacture.

Option B.

have a high strength to weight

ratio. Option C. Question Number.

26.

The main metal in

monel is.

Correct Answer is.

have a high strength to

weight ratio.

Option A.

aluminium.

Option B.

nickel.

Option C.

stainless steel.


are corrosion resistant but heavy.

Explanation.

NIL.

Question Number.

nickel.

Monel is a nickel alloy.

30.

Which part of the

2017-T36 aluminium alloy designation indicates the primary alloying agent used in its manufacture?.

Question Number.

27.

A tube complying

to BS T51 is.

Option A.

20.

Option B.

2. 17.

Option A.

tungum.

Option C.

Option B.

HTS tube.

Correct Answer is.

Option C.

high pressure seamless copper

Explanation.

2.

NIL.

tube. Correct Answer is.

high pressure seamless

copper tube. Explanation.

Question Number. BL/6-15 3.2.1 or download

Option A.

aluminium alloys.

0000300.pdf

Clad aluminium

alloys are used in aircraft because they.

External document... page 28. http://www.dstan.mod.uk/data/05/069/0

31.

Option B.

are harder wearing than unclad are less subject to corrosion than

uncoated aluminium alloys. Option C. Question Number.

28.

Why is nickel

chromium used in many exhaust systems?.

are stronger than unclad

aluminium alloys. Correct Answer is.

are less subject to

corrosion than uncoated aluminium alloys. Option A.

Corrosion resistant and high heat

Explanation.

NIL.

conductivity. Option B.

Lightweight and flexible.

Option C.

Corrosion resistant and low

expansion coefficient.

Question Number.

32.

Non heat treatable

aluminium alloys.



Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Option A. e l b a l i a v A P Q m a x E e l u d o M 6 6 R A C l l A ( s r e p a P n o i t s e u Q A C G D / b f @ k o o b e c a F n o s u e k i L , ) n i . s r e p a p n o i t s e u q a c g d . w w w (

3 1 e g a P


Question Number.

36.

surface of Aluminium Alloy, what material are you

hardening. Option B.

cannot be softened.

removing?.

Option C.

cannot be hardened.

Option A.

Oxide layer.

Option B.

Aluminium.

Option C.

Alloy.

Correct Answer is.


hardening. Explanation.

When buffing

NIL.


Oxide layer.

Polishing al.alloy, pure al. or

Alclad, you would be removing the oxide layer. Question Number.

33.

Solution treatment

after manufacturers have performed it once can be carried out a further.

Question Number.

Option A.

1 time.

preferred to pure Aluminium?.

Option B.

2 times.

Option A.

Less brittle.

Option C.

3 times.

Option B.

More ductile.

Option C.

Tougher.


2 times.

Solution treatment to Alclad can

Correct Answer is.

37.

Why is clad alloy

Tougher.

be carried out only 3 times in total. CAIPs BL/9-1.

Explanation.

Rivets can be re-heat treated 3 times (so 4 times in

aluminium alloy is 90% aluminium alloy. The fact

total) BL/6-27 6.3.

that it is clad is irrelevant.

Question Number.

34.

Following solution

The important factor is that clad

Question Number.

38.

Why are

treatment aluminium alloy can be placed into

aluminium alloys used on aircraft, instead of pure

service.

aluminium?.

Option A.

after 5 days.

Option A.

Stronger.

Option B.

straight away.

Option B.

Corrosion resistant.

Option C.

after 24 hours.

Option C.

Lighter.


after 5 days.

Full hardness is achieved after 4-5


Stronger.

NIL.

days. CAIPs BL/9-1 Para 7. Question Number. Question Number.

35.

The time between

39.

The magnesium

alloys used in aircraft can be recognized by.

removal from heat treatment furnace and quenching must be not more than.

Option A.

Option A.

3 seconds.

plated on the surface.

Option B.

10 seconds.

Option B.

Option C.

7 seconds.

treatment.


10 seconds.

Jeppesen A&P Technician Airframe

Textbook Page 2-9.

Option C.

shiny surface due to chromium yellowish surface due to protective silver surface due to protective

coating. Correct Answer is.

yellowish surface due to

protective treatment. Explanation.

NIL.




4 1 e g a P

Question Number.

40.

NIL.

Age hardening of Question Number.

aluminium is.

44.

Titanium can be

Option A.

never carried out.

identified by placing it on a grinding wheel and

Option B.

a gradual hardening over a period

looking for.

of time. Option C.

not necessary.


never carried out.

Aluminium will not age harden like

aluminium alloys such as dural as there ars no

Option A.

Red Sparks.

Option B.

Yellow Sparks.

Option C.

White Sparks.


White Sparks.

NIL.

alloying elements such as copper that will come out of solution over time. Question Number.

45.

The critical

process of heat treatment is. Question Number.

41.

Alclad is.

Option A.

temperature, method of heating

and cooling. Option A.

aluminium with duralumin

temperature and method of

heating only.

cladding. Option B.

Option B.

duralumin with aluminium coating.

Option C.

method of heating only.

Correct Answer is. Option C.

duralumin with magnesium

heating and cooling. Explanation.

cladding. Correct Answer is.

temperature, method of

NIL.

duralumin with aluminium

coating. Explanation.

NIL.

Question Number.

46.

Re-treatment of

aluminium alloys can be performed by. Question Number.

42.

The oxide film on

Option A.

alocrom treatment.

Option B.

brushing on phosphate treatment

the surface of aluminium is.

followed by paint.

Option A.

hard and porous.

Option C.

Option B.

porous.

Correct Answer is.

Option C.

non porous.

Explanation.


selenious acid treatment. alocrom treatment.

NIL.

non porous.

NIL. Question Number.

47.

What is generally

true for titanium alloy?. Question Number.

43.

The process of

Option A.

It is stronger than the aluminium.

aluminium alloy is.

Option B.

It is stronger than the steel.

Option A.

metalizing.

Option C.

It has lower density than

Option B.

cladding.

magnesium.

Option C.

electroplating.

Correct Answer is.

forming a pure layer of aluminium over an

Correct Answer is.

cladding.

It is stronger than the

aluminium.




5 1 e g a P

Correct Answer is.

NIL.

http://www.geocities.com/pganio/materia

ls.html

that the material is from

an approved source. OR only the specification of the material. Explanation.

Question Number.

48.

NIL.

Malleable

materials are.

Question Number.

52.

When two or more

Option A.

easy to forge.

metallic materials are fused together, the

Option B.

easy to cast.

combination is known as.

Option C.

highly ductile.

Option A.

a composite material.

Option B.

a thermosetting compound.

Option C.

an alloy.


easy to forge.

Malleability does not necessarily

Correct Answer is.

mean ductility.


49.

an alloy.

Fuse means 'to melt'.

If a material has to

undergo deep cold forming operation. The

Question Number.

essential property would be.

materials are normally.

Option A.

ductility.

Option A.

also highly ductile.

Option B.

malleability.

Option B.

easy to cast.

Option C.

elasticity.

Option C.

easily forged.


malleability.

Explanation.

NIL.

Question Number.

Correct Answer is.

50.

The metal which

must not be heated in a salt bath is.

Question Number.

Option B.

duralumin.

Option A.

Invar.

Option C.

rivets made of alclad.

Option B.

Cobalt.

Option C.

Silicon.

Explanation.

Correct Answer is.

NIL.

easily forged.

54.

The common

bonding material for Tungsten Carbide is.

magnesium alloy.

magnesium alloy.

Malleable

NIL.

Option A.

Correct Answer is.

53.

Explanation.

Cobalt.

Cobalt is used to bond tungsten

carbide to cutting tools. Question Number.

51.

The colour code

on sheet metal indicates. Option A.

only the specification of the

material. Option B.

55.

Grain size will

effect the mechanical properties of metal. Which the spec and gauge of the

of the following is true?. Option A.

material. Option C.

Question Number.

that the material is from an

approved source.

Large grain size is attributed to

slow cooling rates and will give less tensile strength. Option B.

Materials with large grain size are

more prone to creep.



Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Option C. e l b a l i a v A P Q m a x E e l u d o M 6 6 R A C l l A ( s r e p a P n o i t s e u Q A C G D / b f @ k o o b e c a F n o s u e k i L , ) n i . s r e p a p n o i t s e u q a c g d . w w w (

6 1 e g a P

Small grain size is normally

Option B.

attributed to rapid cooling rates and will give less

aged.

tensile strength.

Option C.

Correct Answer is.

Large grain size is

solution treated and naturally solution treated and artificially

aged.

attributed to slow cooling rates and will give less

Correct Answer is.

tensile strength.

naturally aged.

Explanation.

Explanation.

NIL.

solution treated and

NIL.


metal_stds.html Question Number.

56.

The cracking of

structural members under repeated stress lower than the ultimate tensile load is known as.

Question Number.

59.

A metal is coded

1285 using the IADS coding method. This means Option A.

creep.

the metal is.

Option B.

fatigue failure.

Option A.

85% pure aluminium.

Option C.

stress reversal.

Option B.

99.85% pure aluminium.

Option C.

a copper based aluminium alloy


fatigue failure.

NIL.

i.e. duralumin. Correct Answer is. Explanation.

Question Number.

57.

A piece of

duralumin has been annealed and bent into shape

99.85% pure aluminium.

NIL.


metal_stds.html

prior to fitting to an aircraft. Which of the following is correct? It must be. Option A.

fitted to the aircraft within 24

Question Number.

60.

A material

containing approximately 66% nickel and 33%

hours. Option B.

solution treated, precipitation

copper is known as.

treated and fitted to the aircraft within 2 hours.

Option A.

Nimonic.

Option C.

Option B.

Monel metal.

Option C.

Invar

solution treated prior to fitting to

an aircraft. Correct Answer is.

solution treated,

precipitation treated and fitted to the aircraft


Monel metal.

NIL.

within 2 hours. OR solution treated prior to fitting to an aircraft. Explanation.

Question Number.

NIL.

61.

Monel metal

consists of approximately. Option A.

66% Chromium and 33% Copper.

designated 2024-T4. The code tells us that the

Option B.

66% Copper and 33% Nickel.

material is a copper based aluminium alloy.

Option C.

66% Nickel and 33% Copper.

Question Number.

58.

A sheet of metal is

Correct Answer is. Option A.

annealed and Naturally aged.

66% Chromium and 33%

Copper.




7 1 e g a P

Correct Answer is.

NIL.

http://www.lenntech.com/Monel.htm

propagating. Explanation.

Question Number.

62.

To stop the crack from

NIL.

Silver solder is

composed of the materials.

Question Number.

Option A.

Copper, Tin and Silver.

aluminium.

Option B.

Zinc, Lead and Silver.

Option A.

increases the tensile strength.

Option C.

Copper, Zinc and Silver.

Option B.

makes the material brittle. removes stresses caused by

Correct Answer is.

Copper, Zinc and Silver.

Option C.

Explanation.

http://ajh-

forming.

NIL.

Correct Answer is.

knives.com/soldering.html

66.

Annealing of

removes stresses caused

by forming. Explanation. Question Number.

63.

NIL.

The ease with

which a material can be forged, rolled and extruded without fracture is an indication of a material's. Option A.

malleability.

Option B.

ductility.

Option C.

brittleness.


malleability.

NIL.

Question Number.

64.

What is fatigue?.

Option A.

Cyclic stressing of a part.

Option B.

Failure of a component due to

corrosion. Option C.

Constant stressing of a part.


Cyclic stressing of a part.

NIL.

Question Number.

65.

Why is stop drilling

carried out at the end of a crack?. Option A.

To change the direction of the

crack. Option B.

To stop the crack from

propagating. Option C.

To increase the stress

concentration at the crack end.


Dgca Module 06 Part 01

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