Mechanical Engineering :: Workshop Technology
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Loam sand is a mixture of
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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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The oxy-acetylene gas used in gas welding produce a flame temperature of
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For gas welding, the presure desired at the welding torch for acetylene is
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The process extensively used for making bolts and nuts is
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Spot welding is used for welding
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Thermit welding is often used in
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The directional solidification in casting can be improved by using
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A sand employed on the faces of the pattern before moulding, is called
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A.
The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction.
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B.
The upper and bottom rolls rotate in the same direction whereas the middle roll rotate in opposite direction.
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C.
The bottom and middle roll rotate in the same direction.
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D.
any one of the above
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