Multiple Choice Questions (MCQ) on Extrusion Process
Multiple Choice Questions (MCQ) on Extrusion Process
1-In Extrusion, metal is caused to flow through a
(A) restricted orifice
(B) pipe
(C) nozzle
(D) any of the above
2-In extrusion, material is
(A) pulled
(B) pushed
(C) both (A) and (B)
(D) none of the above
3-Which of the following is true for extrusion process
(A) Extrusion is a single pass process
(B) Amount of reduction in extrusion is large
(C) Brittle material can also be very easily produced
(D) All of the above
4-The extrusion pressure depends upon
(A) extrusion temperature
(B) the reduction in area
(C) the extrusion speed
(D) all of the above
5-Extrusion ratio is
(A) Cross-sectional ratio of billet / Cross-sectional area of the product
(B) Cross-sectional area of the product / Cross-sectional ratio of billet
(C) Cross-sectional area of the product / Cross-sectional ratio of die
(D) None of the above
6-In Forward extrusion, problem of friction is severe in case of
(A) lead
(B) aluminium
(C) tin
(D) steel
7-Following is used as lubricant in extrusion
(A) oil
(B) graphite
(C) molten glass
(D) all of the above
8-In which of the following extrusion process, die is housed by ram or plunger
(A) Direct extrusion
(B) Forward extrusion
(C) Backward extrusion
(D) All of the above
9-There is no or very low friction force in
(A) Indirect extrusion
(B) Forward extrusion
(C) Direct extrusion
(D) All of the above
10-Nuclear reactor fuel rods are produced by
(A) Impact extrusion
(B) Hooker extrusion
(C) Hydrostatic extrusion
(D) Cold extrusion forging
11-Collapsible paste tubes are produced by
(A) Impact extrusion
(B) Hooker extrusion
(C) Hydrostatic extrusion
(D) Cold extrusion forging
12-The dies employed in extrusion are made of
(A) Mild steel
(B) High carbon steel
(C) High speed steel
(D) Any of the above
13-Following is (are) extrusion defect(s)
(A) Surface cracking
(B) Internal cracking
(C) Extrusion defect
(D) All of the above
ANSWERS:
1-(A), 2-(B), 3-(D), 4-(D), 5-(A), 6-(D), 7-(D), 8-(C), 9-(A), 10-(C), 11-(A), 12-(C), 13-(D)