1) What is the highest possible percentage of clay contents in loam sand?
a. 10
b. 20
c. 30
d. 50
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Answer
Explanation
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ANSWER: 50
Explanation:
No explanation is available for this question!
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2) The ability of the moulding sand to withstand the heat of melt without showing any sign of softening is called as
a. strength or cohesiveness
b. refractiveness
c. collapsibility
d. adhesiveness
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Answer
Explanation
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ANSWER: refractiveness
Explanation:
No explanation is available for this question!
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3) A model of casting, constructed to use for forming a mould in damp sand, is called as
a. sand construction
b. pattern
c. cover
d. none of the above
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Answer
Explanation
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ANSWER: pattern
Explanation:
No explanation is available for this question!
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4) Which of the following is not a requirement of a good pattern?
a. It should be light in weight to handle easily
b. It should be smooth to make casting surface smooth
c. It should have low strength to break it and to remove casting easily
d. none of the above
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Answer
Explanation
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ANSWER: It should have low strength to break it and to remove casting easily
Explanation:
No explanation is available for this question!
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5) The patterns which are made in two or more pieces are called as
a. solid patters
b. split patterns
c. loose piece patterns
d. none of the above
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Answer
Explanation
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ANSWER: split patterns
Explanation:
No explanation is available for this question!
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6) Permeability can be defined as the property of moulding sand
a. to hold sand grains together
b. to allow gases to escape easily from the mould
c. to withstand the heat of melt without showing any sign of softening
d. none of the above
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Answer
Explanation
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ANSWER: to allow gases to escape easily from the mould
Explanation:
No explanation is available for this question!
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7) The sand in its natural or moist state is called as
a. green sand
b. loam sand
c. dry sand
d. none of the above
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Answer
Explanation
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ANSWER: green sand
Explanation:
No explanation is available for this question!
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8) Match the following contents of green sand in Group 1 with their approximate per cent in Group 2.
1. Silica -------------------------- A. 5 to 10 per cent
2. Clay --------------------------- B. 2 to 5 per cent
3. Bentonite --------------------- C. 8 to 15 per cent
4. Coal dust --------------------- D. 7 to 8 per cent
5. Water -------------------------- E. up to 75 per cent
a. 1-(E), 2-(C), 3-(B), 4-(A), 5-(D)
b. 1-(E), 2-(A), 3-(B), 4-(C), 5-(D)
c. 1-(C), 2-(D), 3-(B), 4-(A), 5-(E)
d. 1-(C), 2-(A), 3-(B), 4-(D), 5-(E)
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Answer
Explanation
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ANSWER: 1-(E), 2-(C), 3-(B), 4-(A), 5-(D)
Explanation:
No explanation is available for this question!
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9) Which of the following sentences is/are correct for casting process?
a. Casting process is comparatively costly
b. Objects of larges sizes cannot be produced easily by casting process
c. The time required for the process of making casting is quite long
d. All of the above sentences are correct
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Answer
Explanation
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ANSWER: The time required for the process of making casting is quite long
Explanation:
No explanation is available for this question!
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10) The productivity of casting process is comparatively
a. lower than the productivity of other automatic processes like rolling
b. higher than the productivity of other automatic processes like rolling
c. similar to the productivity of other automatic processes like rolling
d. unpredictable
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Answer
Explanation
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ANSWER: lower than the productivity of other automatic processes like rolling
Explanation:
No explanation is available for this question!
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