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Module 7: Maintenance Practices (B1) > 7.14 - Material Handling > Flashcards

7.14 - Material Handling Flashcards

1
Q

What is the minimum number of teeth that should be in contact with a material while cutting with a hacksaw?

A

Minimum number of teeth in contact with a material while cutting with a hacksaw is 2

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2
Q

What are the upper and lower halves of the casting mold called?

A

The upper and lower halves of the casting mold are called cope and drag

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3
Q

A steel component that has been cast ________ (does/does not) require heat treatment

A

A steel component that has been cast does require heat treatment

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4
Q

In the shell molding casting process fine sand is mixed with clay to produce the mold.
(True or False)

A

In the shell molding casting process fine sand is mixed with clay to produce the mold. FALSE

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5
Q

Hollow cylinders can be cast using the ________ method

A

Hollow cylinders can be cast using the *Centrifugal casting method

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6
Q

What does hot pressing do while forging?

A

Hot pressing re-aligns the grain structure while forging

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7
Q

What does Chemical Milling do?

A

Chemical Milling is a process that Removes unwanted material

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8
Q

Sublimation is part of what machining process?

A

Sublimation is part of the Electro Discharge machining process

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9
Q

When bending sheet material, the ‘‘Bend Allowance’’ varies depending on what 2 factors?

A

When bending sheet material, the “Bend Allowance” Varies depending on material thickness and bend angle

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10
Q

When should ‘Set Back’ be considered?

A

“Set Back” is a dimension to be considered when bending sheet material

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11
Q

What is the sight line in a sheet material bending process?

A

When bending sheet material in a break press, the sight line is the centre of the bend

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12
Q

2024-T3
What do all elements of the above mean?

A

2024-T3
2 – Main alloying element
0 – Mod statis
24 – Doesn’t matter
T3 – Heat treatment Status

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13
Q

What is meant by T3?

A

T3 – Solution heat treated, cold worked, natural aged.

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14
Q

What is meant by T4?

A

T4 – Solution heat treated, natural aged.

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15
Q

What is meant by T6?

A

T6 – Solution heat treated, Artificial aged (Stronger)

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16
Q

Artificial aged?

A

Artificial aged = Done at high temp.

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17
Q

What is Galvanic corrosion?

A

Dissimilar metal corrosion = Galvanic corrosion

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18
Q

When blasting corrosion use ________

A

When blasting corrosion use glass beads

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19
Q
A

2

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20
Q
A

Cope & Drag

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21
Q
A

False

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22
Q
A

False

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23
Q
A

Centrifugal casting method

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24
Q
A

Hot pressing

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25
Q

How should sheet aluminium be stored?
a) Upright on it’s longest edge in wooden racks
b) Upright on it’s shortest edge against a solid surface
c) Stored flat in a humidity and temperature controlled room

A

a) Upright on it’s longest edge in wooden racks

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26
Q
A

Removes unwanted material

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27
Q
A

Electro Discharge machining process

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28
Q
A

Graphite pencils

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29
Q
A

Varies depending on material thickness and bend angle

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30
Q
A

A dimension to be considered when bending sheet material

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31
Q
A

The center of the bend

32
Q

Question Number. 1. The purpose of a joggle is.
Option A. to act as a tear stopper.
Option B. to make the holes for a rivet line up.
Option C. to produce a flush fit at a metal joint.

A

Option C. to produce a flush fit at a metal joint.

33
Q

Question Number. 2. Caustic soda applied to a metal turns black. This would indicate the metal is.
Option A. magnesium alloy.
Option B. duralumin.
Option C. aluminium.

A

Option B. duralumin.

34
Q

Question Number. 3. Removal of a scratch from a sheet of metal requires.
Option A. polishing.
Option B. blending.
Option C. burnishing.

A

Option C. burnishing.

35
Q

Question Number. 4. When dimpling a sheet of metal you would require.
Option A. an oversized rivet and special reaction block.
Option B. a male and female die.
Option C. a male die only.

A

Option B. a male and female die.

36
Q

Question Number. 5. The skin on an aircraft is normally manufactured from.
Option A. 2024 aluminium alloy.
Option B. 7075 aluminium alloy.
Option C. 2117 aluminium alloy.

A

Option A. 2024 aluminium alloy.

37
Q

Question Number. 6. The mold point is.
Option A. the mid point in the thickness of a sheet of metal to which the radius dimension is calculated.
Option B. the centre of curvature of a radiused corner in a metal fabricated component.
Option C. an imaginary point from which real base measurements are provided.

A

Option C. an imaginary point from which real base measurements are provided.

38
Q

Question Number. 7. Relief holes are.
Option A. holes drilled in a battery container to provide drainage.
Option B. holes drilled in the corner of a metal box to prevent cracking.
Option C. holes drilled to stop a crack.

A

Option B. holes drilled in the corner of a metal box to prevent cracking.

39
Q

Question Number. 8. The ‘setback’ is.
Option A. the distance from the edge of the metal to the bend tangent line.
Option B. the distance from the mold point to the bend tangent line.
Option C. the distance from the bend tangent line to the setback line.

A

Option B. the distance from the mold point to the bend tangent line.

40
Q

Question Number. 9. Faying surfaces are.
Option A. surfaces that are in contact with each other.
Option B. surfaces that are stressed.
Option C. surfaces that have been treated with anti-corrosion compound.

A

Option A. surfaces that are in contact with each other.

41
Q

Question Number. 10. In sheet metal bending, how would you measure the bend radius to calculate the bend allowance?.
Option A. Measure to the inside of the bend radius.
Option B. Measure to the outside of the bend radius.
Option C. Measure to the inside of the bend radius plus half the metal thickness.

A

Option A. Measure to the inside of the bend radius.

42
Q

Question Number. 11. When dimpling sheet with a squeeze dimpling tool.
Option A. the jaws are not adjustable.
Option B. adjust the jaws to accommodate different material gauges.
Option C. use a lubricant.

A

Option B. adjust the jaws to accommodate different material gauges.

43
Q

Question Number. 12. Bend radius on sheet metal is.
Option A. inside radius + ½ thickness.
Option B. inside radius.
Option C. outside radius.

A

Option B. inside radius.

44
Q

Question Number. 13. Aircraft skin is joggled to.
Option A. Provide smooth airflow at faying surfaces.
Option B. Make a frame lighter but stronger.
Option C. Conform with the ‘Area Rule’.

A

Option A. Provide smooth airflow at faying surfaces.

45
Q

Question Number. 14. DZinc Chromate applied between faying surfaces will.
Option A. improve adhesion thus relieving the amount of riveting necessary.
Option B. improve bonding between them.
Option C. inhibit dissimilar metal (electrolytic) corrosion.

A

Option C. inhibit dissimilar metal (electrolytic) corrosion.

46
Q

Question Number. 15. If a non-ferrous metal being examined by chemical test turns black when caustic soda is applied to the surface, the metal is.
Option A. duralumin.
Option B. alclad.
Option C. aluminium.

A

Option A. duralumin.

47
Q

Question Number. 16. To aid marking out on Fe metals use.
Option A. graphite grease.
Option B. copper sulphate solution.
Option C. engineer’s blue.

A

Option B. copper sulphate solution.

Fe means Ferrous. Copper sulphate solution should be used

48
Q

Question Number. 17. The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked.
Option A. one-half radius from either bend tangent line.
Option B. one radius from the bend tangent line that is placed under the brake.
Option C. one radius from either bend tangent line.

A

Option B. one radius from the bend tangent line that is placed under the brake.

49
Q

Question Number. 17. The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked.
Option A. one-half radius from either bend tangent line.
Option B. one radius from the bend tangent line that is placed under the brake.
Option C. one radius from either bend tangent line.

A

Option B. one radius from the bend tangent line that is placed under the brake.

50
Q

Question Number. 18. If copper sulphate is used on magnesium alloy it will.
Option A. effervesce to a copper colour.
Option B. have no effect.
Option C. effervesce to a black colour.

A

Option C. effervesce to a black colour.

51
Q

uestion Number. 19. If it is necessary to compute a bend allowance problem and bend allowance tables are not available, the neutral axis of the bend can be.
Option A. found by adding approximately one-half of the stock thickness to the bend radius.
Option B. found by subtracting the stock thickness from the bend radius.
Option C. represented by the actual length of the required material for the bend.

A

Option A. found by adding approximately one-half of the stock thickness to the bend radius.

52
Q

Question Number. 20. The formula for setback for a 90° bend is.
Option A. (½R + T).
Option B. (R + T).
Option C. (R + ½T).

A

Option B. (R + T).

53
Q

Question Number. 21. Caustic soda placed on the edge of alclad will turn.
Option A. white – black – white.
Option B. all white.
Option C. black – white – black.

A

Option A. white – black – white.

54
Q

Question Number. 22. In marking a light alloy.
Option A. the scriber must be held at an angle to give a smooth line where bending is required.
Option B. caustic soda is used.
Option C. a pencil is used to mark the material and all marks removed after bending.

A

Option C. a pencil is used to mark the material and all marks removed after bending.

55
Q

Question Number. 23. When assembling metals of different potential, corrosion may be inhibited by application of.
Option A. zinc or chromic acid & assemble while wet.
Option B. zinc or barium chromate & assemble while wet.
Option C. nothing - assemble bare.

A

Option B. zinc or barium chromate & assemble while wet.

56
Q

Question Number. 24. Steel wire brushes or steel wool should.
Option A. be used to clean magnesium alloys.
Option B. be used to clean aluminium sheet.
Option C. never be used on light alloys.

A

Option C. never be used on light alloys.

57
Q

Question Number. 25. When a piece of metal is bent, the surface of the metal on the outside of the bend is.
Option A. in compression.
Option B. neither in tension or in compression.
Option C. in tension.

A

Option C. in tension.

58
Q

Question Number. 26. The sight line of a bend is.
Option A. at the tangent line.
Option B. half a radius from the tangent line.
Option C. one radius from the tangent line.

A

Option C. one radius from the tangent line.

59
Q

Question Number. 27. The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the.
Option A. maximum radius of bend.
Option B. minimum radius of bend.
Option C. bend allowance.

A

Option B. minimum radius of bend.

60
Q

Question Number. 28. Scribers are used to.
Option A. produce an accurate finish.
Option B. make centre pop marks for drilling.
Option C. mark guide lines on material.

A

Option C. mark guide lines on material.

61
Q

Question Number. 29. A hole drilled at the intersection of two bends in a fabricated sheet metal component is called.
Option A. a drain hole.
Option B. a crack stopper.
Option C. a relief hole

A

Option C. a relief hole

62
Q

Question Number. 30. Dissimilar metal diffusion bonding gives.
Option A. high strength and ductility.
Option B. high strength and stiffness.
Option C. high strength and brittleness.

A

Option B. high strength and stiffness.

63
Q

Question Number. 31. Marking out on stainless steel can be clarified by application of.
Option A. ammonia.
Option B. copper sulphate.
Option C. sal ammoniac.

A

Option B. copper sulphate.

Copper sulphate is used to aid marking out of steel

64
Q

Question Number. 32. When drawing lines on aluminium alloy sheet prior to bending.
Option A. a thin coat of zinc chromate primer should be used, ready for pencil lines.
Option B. a scriber should be used.
Option C. a wax pencil should be used.

A

Option A. a thin coat of zinc chromate primer should be used, ready for pencil lines.

65
Q

Question Number. 33. After solution treatment of aluminium alloy, the effect of immediate refrigeration at a temperature with the range -15°C to -20°C is.
Option A. to suspend natural ageing for a limited period.
Option B. to permanently soften the metal to retard the onset of fatigue.
Option C. to increase the rate of artificial ageing.

A

Option A. to suspend natural ageing for a limited period.

66
Q

Question Number. 34. Diffusion bonding and superplastic forming provides.
Option A. high strength and high ductility.
Option B. high strength and high stiffness.
Option C. high stiffness and high ductility.

A

Option C. high stiffness and high ductility.

67
Q

Question Number. 1. In a composite repair lay-up, how much should each layer extend beyond the layer below it?.
Option A. 2 - 3 inches.
Option B. 1 - 2 inches.
Option C. 3 - 4 inches.

A

Option B. 1 - 2 inches.

68
Q

Question Number. 2. To enable a composite panel to dissipate static charge it would be sprayed with.
Option A. polyurethane paint.
Option B. ferrous paint.
Option C. aluminium paint.

A

Option C. aluminium paint.

69
Q

Question Number. 3. A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What non-destructive testing method is used to determine the soundness of the repair after the repair has cured?.
Option A. Eddy current test.
Option B. Metallic ring test.
Option C. Ultrasonic test.

A

Option B. Metallic ring test.

70
Q

Question Number. 4. A non-destructive testing technique which is suitable for inspecting for delamination in Redux bonded structure of light aluminium alloys is.
Option A. ultrasonic.
Option B. eddy-current.
Option C. magnetic flow.

A

Option A. ultrasonic.

71
Q

Question Number. 5. Why is an extra layer of fibreglass added to a composite repair?.
Option A. To provide additional flexibility.
Option B. For sacrificial sanding.
Option C. To increase the strength of the repair.

A

Option C. To increase the strength of the repair.

72
Q

Question Number. 6. How do you reduce or remove electrostatic charges which may build up on fibreglass surfaces?.
Option A. No special treatment is necessary because fibre glass is an insulator.
Option B. The surface is treated with a special conductive paint.
Option C. The surface is impregnated with copper strips.

A

Option B. The surface is treated with a special conductive paint.

73
Q

Question Number. 7. Prior to aluminium alloy bonding we use.
Option A. alkaline etch.
Option B. acid etch.
Option C. solvent wipe.

A

Option B. acid etch.

Phosphoric acid and chromic acid wash

74
Q

Question Number. 8. Glass reinforced panels are bonded by.
Option A. special conductive paint.
Option B. wire mesh.
Option C. bonding strips to conductors.

A

Option A. special conductive paint.

75
Q

Question Number. 9. What solvents could you use to clean tools used for fibreglass repairs?.
Option A. Trichloroethylene or acetone.
Option B. Lead free petrol/kerosene.
Option C. acetone or MEK.

A

Option C. acetone or MEK.

76
Q

Question Number. 10. Chopped strand mat is a good general purpose mat because.
Option A. it has short fibres.
Option B. it gives equal properties in all directions.
Option C. it is a stiffer than woven cloth.

A

Option B. it gives equal properties in all directions.

Module 7: Maintenance Practices (B1) (20 decks)

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