Saturday, June 25, 2005

Question paper for Blacksmithy exam.

Sample question paper for entrance exam of the MetalWorkers Guild of India apprentice blacksmithy entrance examination.

Why should the welding fire be deep, clean, and compact? (b) How often should the fire be cleaned when welding?

What is meant by scarfing? (b) What are the characteristics of a good scarf f? (c) Why are long thin pieces hard to weld? (d) Why are irons usually upset before scarfing?

What materials may be used for welding flux? (b) When and how is it applied? (c) Just how does a flux assist in welding? (d) What kinds of iron and steel, if any, may be welded without flux?

What precautions should be observed in heating irons for welding? (b) What should be done in case one iron heats faster than the other? (c) Why should the scarfs be down instead of up just before the irons are removed from the fire for welding?

How may the welding heat be recognized?

(a) Outline the process of making a welded chain link or a ring. (b) What is the general shape of the link scarf ? (c) Why is it important to have the ends lapped at about 90 deg. when they are being welded? (d) Why is the link given a sharp rap over the edge of the anvil just after it is taken from the fire and before the ends are welded together? (e) Why should the weld be started with only medium and not heavy blows? (f) How may the welded part of a link or a ring be neatly and smoothly finished?

(a) Explain and be able to demonstrate how to quickly take two irons out of the fire and place them accurately on the anvil for welding. (b) Should the thin edges of the scarfs be welded down first or last, or at some other time? Why? (c) After a weld is completed in a round rod, just how should the welded section be neatly smoothed and brought to size?

(a) What are common causes of failure in welding? (b) What procedure would you recommend in case irons do not stick at the first attempt to weld? At the second or third attempt?

(a) Just how would you proceed to make a welded eyebolt? (b) How may the work be done to prevent marring and drawing the stem next to the eye?

(a) Just how should a steel. plowshare be placed in the fire for heating?, (b) How much of the share should be heated at a time? (c) What is the proper forging heat for steel plowshares? (d) Should the share be hammered on the top or on the bottom side? (e) What important points should be observed in shaping the share?

(a) How may plowshares be hardened? (b) What kind of shares should be hardened very little if at all? Why?

How are chilled iron shares sharpened?

(a) How are spike-tooth harrow teeth sharpened? (b) Should they be hardened? If so, how?

(a) What is pig iron? (b) How is it made? (c) For what is it used?

(a) How are castings made? (b) What are some of the important properties or characteristics of cast iron?

(a) What is chilled iron, and how is it made? (b) What are the main uses of chilled iron in farm machines?

(a) What special property does malleable iron have? (b) How are malleable castings made?

(a) What is wrought iron? (b) How is it made?

(a) How is mild steel made? (b) By what other names is mild steel commonly known? (c) What are its important properties or characteristics?

(a) How is tool steel made? (b) What are the chief differences between tool steel and mild steel? (c) How is the amount of carbon in tool steel commonly designated? (d) How much carbon is contained in steel used for making blacksmithing tools like hammers and cold chisels?

Just how may one distinguish between the various grades of steel?

(a) What is soft-center steel, and how is it made? (b) What are its particular advantages over other kinds of steel? (c) In what parts of farm machines is it commonly used?

(a) What is an alloy steel? (b) What materials or metals are commonly used in making alloy steels? (c) In what respects may allow steels be better than plain steels?

References (text books)

SCHWARZKOPF: "Plain and Ornamental Forging."

RADERAUGH: "Repairing Farm Machinery."

FRIESE: "Farm Blacksmithing."

HARCOURT: "Elementary Forge Practice."

Boss, DENT, and WHITE: "Mechanical Training.

SMITH, ROBERT H.: "Agricultural Mechanics."

SELVIDGE and ALLTON: "Blacksmithing."

backlink: India Blacksmith

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