Material Handling - Sheet metal

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.

Correct Answer is. to produce a flush fit at a metal joint.

Explanation. A&P Technician Airframe Textbook 2-8.

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.

Correct Answer is. duralumin.

Explanation. NIL.

Question Number. 3. Removal of a scratch from a sheet of metal requires.

Option A. polishing.

Option B. blending.

Option C. burnishing.

Correct Answer is. burnishing.

Explanation. A&P Mechanics Airframe Textbook Page 130.

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.

Correct Answer is. a male and female die.

Explanation. A&P Technician Airframe Textbook 2-59.

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.

Correct Answer is. 2024 aluminium alloy.

Explanation. A&P Technician Airframe Textbook 2-7.

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.

Correct Answer is. an imaginary point from which real base measurements are provided.

Explanation. A&P Technician Airframe Textbook 2-71.

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.

Correct Answer is. holes drilled in the corner of a metal box to prevent cracking.

Explanation. A&P Technician Airframe Textbook 2-77.

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.

Correct Answer is. the distance from the mold point to the bend tangent line.

Explanation. A&P Technician Airframe Textbook 2-71.

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.

Correct Answer is. surfaces that are in contact with each other.

Explanation. NIL.

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.

Correct Answer is. Measure to the inside of the bend radius.

Explanation. Jeppesen A & P Tecnician Airframe Textbook pg 2-70.

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.

Correct Answer is. adjust the jaws to accommodate different material gauges.

Explanation. Jeppesen A&P Airframe Textbook 2-59.

Question Number. 12. Bend radius on sheet metal is.

Option A. inside radius + ½ thickness.

Option B. inside radius.

Option C. outside radius.

Correct Answer is. inside radius.

Explanation. Jeppesen A&P Airframe Textbook 2-70.

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'.

Correct Answer is. Provide smooth airflow at faying surfaces.

Explanation. Jeppesen A & P Tecnician Airframe Textbook pg 2-82.

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.

Correct Answer is. inhibit dissimilar metal (electrolytic) corrosion.

Explanation. NIL.

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.

Correct Answer is. duralumin.

Explanation. NIL.

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.

Correct Answer is. copper sulphate solution.

Explanation. Fe means Ferrous. Copper sulphate solution should be used.

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.

Correct Answer is. one radius from the bend tangent line that is placed under the brake.

Explanation. A&P Airframe Textbook 5-60 Pg 232 Fig 5-118.

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.

Correct Answer is. effervesce to a black colour.

Explanation. NIL.

Question 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.

Correct Answer is. found by adding approximately one-half of the stock thickness to the bend radius.

Explanation. Jeppesen A & P Technician Airframe pg 2-73 fig 2-131.

Question Number. 20. The formula for setback for a 90° bend is.

Option A. (½R + T).

Option B. (R + T).

Option C. (R + ½T).

Correct Answer is. (R + T).

Explanation. A&P Airframe Textbook 5-55 Pg 227 Fig 5-112.

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.

Correct Answer is. white – black – white.

Explanation. NIL.

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.

Correct Answer is. a pencil is used to mark the material and all marks removed after bending.

Explanation. BL/6-29 4.1A&P General Textbook 9-33 Pg 32.

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.

Correct Answer is. zinc or barium chromate & assemble while wet.

Explanation. BL/4-2 4.4.6.

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.

Correct Answer is. never be used on light alloys.

Explanation. NIL.

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.

Correct Answer is. in tension.

Explanation. NIL.

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.

Correct Answer is. one radius from the tangent line.

Explanation. NIL.

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.

Correct Answer is. minimum radius of bend.

Explanation. Jeppesen A&P Airframe Technician Textbook Page 2-70.

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.

Correct Answer is. mark guide lines on material.

Explanation. NIL.

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.

Correct Answer is. a relief hole.

Explanation. BL/6-14 2.2.3 and 3.1.

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.

Correct Answer is. high strength and stiffness.

Explanation. NIL.

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.

Correct Answer is. copper sulphate.

Explanation. Copper sulphate is used to aid marking out of steel.

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.

Correct Answer is. a thin coat of zinc chromate primer should be used, ready for pencil lines.

Explanation. CAIP BL/6-29 4.1.

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.

Correct Answer is. to suspend natural ageing for a limited period.

Explanation. BL/9-1 9. BL/6-27 6.2.

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.

Correct Answer is. high stiffness and high ductility.

Explanation. NIL.

In document 89518189-Easa-Module-07 (Page 146-155)