Module06-New.doc - Module 06. Materials & Hardware 01a....

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01a. Aircraft Materials - Ferrous. Question Number. 1. When drilling stainless steel, use a. Option A. drill ground to 120 °, slow cutting speed. Option B. drill ground to 90 °, fast cutting speed. Option C. drill ground to 90 °, slow cutting speed. Correct Answer is. drill ground to 120 °, slow cutting speed. Explanation. NIL. Question Number. 2. How is a material galvanised?. Option A. Sprayed with nickel solution. Option B. Packed in a drum containing zinc dust and heated. Option C. Dipped in a bath of molten zinc. Correct Answer is. Dipped in a bath of molten zinc. Explanation. NIL. Question Number. 3. What temperature would steel be tempered at?. Option A. At the annealing temperature. Option B. Above the annealing temperature. Option C. Below the annealing temperature. Correct Answer is. Below the annealing temperature. Explanation. NIL. Question Number. 4. Tempering steel gives.
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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. Explanation. Tempering is done to relieve internal stresses. Question Number. 5. The addition of chromium to steel will produce. Option A. toughness. Option B. hardness. Option C. ductility. Correct Answer is. hardness. Explanation. Chromium is alloyed with steel to make it harder. Question Number. 6. Chromium added to plain carbon steel. Option A. increases it's resistance to corrosion. Option B. turns it into a non-ferrous alloy. Option C. makes the metal softer. Correct Answer is. increases it's resistance to corrosion. Explanation. Chromium, when added to steel increases its hardness and corrosion resistance (hence CRS). Question Number. 7. The purpose of case hardening is to. Option A. produce a hard case over a tough core. Option B. reduce the carbon in the steel. Option C. introduce carbon into the steel. Correct Answer is. produce a hard case over a tough core. Explanation. Case hardening hardens the surface only.
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Question Number. 8. At normal temperatures HC steel is harder because. Option A. it has more austenite. Option B. of the % of carbon in the granules. Option C. it has less austenite. Correct Answer is. of the % of carbon in the granules. Explanation. NIL. Question Number. 9. Nitriding is. Option A. tempering. Option B. anodising. Option C. case hardening. Correct Answer is. case hardening. Explanation. Nitriding is a form of case hardening. Question Number. 10. Medium carbon steels have a carbon content of. Option A. 0.3 - 0.5 %. Option B. 0.5 - 0.8 %. Option C. 0.8 - 1.05 %. Correct Answer is. 0.3 - 0.5 %. Explanation. Medium carbon steel is 0.3 - 0.6% (approx). FAA AC43 4-1. Question Number.
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This note was uploaded on 03/09/2011 for the course AIRCRAFT 2008.09.00 taught by Professor Dr.alan during the One '11 term at TAFE NSW - Sydney Institute.

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Module06-New.doc - Module 06. Materials & Hardware 01a....

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