330. Symmetrical hollow parts of circular cross-section are made by hot
A.Forging
B.Spinning
C.Piercing
D.Drawing
331. The pilots in the punch holder assembly in press working operations are provided in order to
A.Ensure proper ejection of the blank
B.Ensure proper location of the blank
C.Reduce the punch load
D.Remove the burrs on the blank
332. The collapsible tooth paste tubes are manufactured by
A.Direct extrusion
B.Piercing
C.Impact extrusion
D.Indirect extrusion
333. Tumbling is the process of
A.Improving fatigue limit
B.Imparting luster to surface
C.Cleaning the surface of small parts
D.Improving creep limit
334. Which of the following is the process for joining two metals
A.Sintering
B.Tumbling
C.Notching
D.Swaging
335. The seamless tubes in mass production are manufactured by the following process
A.Rolling
B.Extrusion
C.Drawing
D.Welding
336. Lancing is the operation of
A.Removal of excess metal from the edge of a strip to make it suitable for drawing without wrinkling
B.Cutting of the excess metal at edge which was required for gripping purpose during press working operation
C.Cutting in a single line across a part of the metal strip to allow bending or forming in progressive die operation while the part remains attached to the strip
D.Punching in which punch is stopped as soon as the metal fracture is complete and metal is not removed but held in hold
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