131. When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.
132. In permanent mould casting method
133. Cutting and forming operations can be performed in a single operation in a
134. The process of decreasing the cross-section of a bar and increasing its length, is called
135. The process of increasing the cross-section of a bar at the expense of its length, is called
136. The cold working of metals is carried out
137. The hot working of metals is carried out
138. In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is
139. Which of the following welding process uses non-consumable electrodes?
140. The oxyacetylene gas used in gas welding produce a flame temperature of
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