Foundry Metallurgy - Study Mode

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[#41] In a sound casting the last liquid to solidify is in the

(A) runner

(B) riser

(C) gate

(D) vent

Correct Answer

(B) riser

[#42] Match the defects in Group 1 with possible causes in Group 2 . Group 1 Group 2 P. Misruns 1. Sand expansion Q. Shifts 2. Molding materials R. Blowholes 3. Improper heating of metals S. Scabs 4. Molding and core making

(A) P-3, Q-4, R-2, S-1

(B) P-1, Q-2, R-3, S-4

(C) P-4, Q-3, R-2, S-1

(D) P-2, Q-1, R-4, S-3

Correct Answer

(A) P-3, Q-4, R-2, S-1

[#43] During metal casting of a slab, the thickness of solid formed after time 't' is proportional to

(A) $${t^{frac{1}{3}}}$$

(B) $${t^{frac{1}{2}}}$$

(C) t

(D) t 2

Correct Answer

(B) $${t^{frac{1}{2}}}$$

[#44] Match the requirement from Group 1 with the suitable casting process from Group 2 . Group 1 Group 2 P. Good surface finish 1. Slush casting Q. Expandable mould 2. Pressure die casting R. Heavy casting 3. Investment casting S. Hollow ornamental casting 4. Sand casting

(A) P-2, Q-3, R-4, S-1

(B) P-4, Q-2, R-4, S-1

(C) P-4, Q-3, R-2, S-4

(D) P-2, Q-1, R-3, S-4

Correct Answer

(A) P-2, Q-3, R-4, S-1

[#45] . . . . . . . . process removes fines and foreign matter, partly clay coating from the sand and partially removes the carbonaceous and organic materials from sand grains.

(A) Dry reclamation

(B) Thermal reclamation

(C) Wet reclamation

(D) Combined wet reclamation plus thermal reclamation

Correct Answer

(C) Wet reclamation