Multiple Choice Questions (MCQ) on Workshop Technology
11-Green sand is a mixture of
(A) 60% sand and 40% clay
(B) 30% sand and 70% clay
(C) 40% sand and 60% clay
(D) 70% sand and 30% clay
12-Loam sand is a mixture of
(A) 20% sand and 80% clay
(B) 50% sand and 50% clay
(C) 70% sand and 30% clay
(D) 80% sand and 20% clay
13-___ sand employed on the faces of the pattern before molding
(A) Green
(B) Dry
(C) Loam
(D) Parting
14-The following method(s) is (are) used to manufacture 2 meter long seamless tube.
(A) Rolling
(B) Extrusion
(C) Drawing
(D) Both (A) and (B)
15-The increase in hardness due to cold working, is known as
(A) case hardening
(B) quench hardening
(C) work hardening
(D) surface hardening
16-During hot working of metals
(A) good surface finish is produced
(B) scale is formed on the metal surface
(C) close tolerances are maintained
(D) None of the above
17-Cold working of metal
(A) produces good surface finish
(B) increases strength
(C) increases hardness
(D) all of the above
18-The hot working of metals takes place
(A) below the recrystallization temperature
(B) above the recrystallization temperature
(C) at the recrystallization temperature
(D) at melting point
19-The cold working of metals takes place
(A) below the recrystallization temperature
(B) above the recrystallization temperature
(C) at the recrystallization temperature
(D) at melting point
20-Following is (are) the advantage(s) of hot working of metals.
(A) Porosity of the metal largely eliminated
(B) Refined grain structure
(C) Improved mechanical properties
(D) All of the above
ANSWERS:
11-(D), 12-(B), 13-(D), 14-(D), 15-(C), 16-(B), 17-(D), 18-(B), 19-(A), 20-(D)