Q. A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

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Q. The oxy-acetylene gas used in gas welding produce a flame temperature of

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Q. Metal patterns require __________ draft allowance than wooden patterns.

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Q. For gas welding, the presure desired at the welding torch for acetylene is

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Q. Spot welding is used for welding

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Q. Thermit welding is often used in

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Q. The directional solidification in casting can be improved by using

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Q. A sand employed on the faces of the pattern before moulding, is called

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Q. The material which can be best cut with oxygen cutting process is

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Q. In fore-hand welding, the weld is made

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Q. In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to

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Q. Thermit, used in thermit welding, is a mixture of

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Q. The width of slot cut by a hacksaw blade is __________ the width of the blade.

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Q. The casting method adopted for ornaments and toys of non-ferrous alloys, is

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Q. In a cold chamber die casting machine

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Q. Structural sections such as rails, angles, I-beams are made by

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Q. The minimum size of a billet is 10 cm x 10 cm.

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Q. In welding magnesium with TIG arc welding, direct current with __________ is used.

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Q. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called

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Q. In die casting, machining allowance is

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