1. . Which of the following defect is not a gas defect?
(A) Blow holes
(B) Air inclusions
(C) Run out
(D) Pin hole porosity
2. . Which gas defect is caused by hydrogen in molten metal?
(A) Blow holes
(B) Air inclusions
(C) Open blows
(D) Pin hole porosity
3. . Cuts, washes, swell, drop etc. are the examples of which of the following casting defects?
(A) Gas defect
(B) Pouring material defect
(C) Molding material defect
(D) Metallurgical defect
4. . When the molten metal leaks out of mold which defect occurs?
(A) Run out
(B) Misrun
(C) Fusion
(D) Drop
5. . Which of the following defects is not an example of type “pouring material defects”?
(A) Misrun
(B) Cold shut
(C) Slag inclusion
(D) Hot tear
6. . The lower fluidity of molten material causes _________
(A) Misrun
(B) Cold shut
(C) Misrun & Cold shut
(D) Fusion
7. . Defects caused by the chilling of the casting are known as?
(A) Hot spots
(B) Hot tears
(C) Shrinkage cavity
(D) Swell
8. . During melting process flux is added to react with impurities to form?
(A) Cavity
(B) Slag
(C) Cold shut
(D) Blow holes
9. . Which defect is caused due to the conversion of moisture to steam because of the heat of molten metal?
(A) Blow holes
(B) Open blows
(C) Air inclusions
(D) Cold shut
10. . Defect which occurs due to the solidification of casting is known as?
(A) Swell
(B) Misrun
(C) Metal penetration
(D) Shrinkage cavity