Engineering :: Production Engineering
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131. |
The moisture content of moulding sand generally varies from |
A. |
2-8 percent |
B. |
10-25 percent |
C. |
25-40 percent |
D. |
40-50 percent |
E. |
50-65 percent |
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Answer: Option A
Explanation:
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132. |
Permeability of a foundry sand is |
A. |
Capacity to hold moisture |
B. |
Porosity to permit the escape of gases |
C. |
Distribution of binder in sand |
D. |
The ability of sand to withstand high temperatures |
E. |
Fineness of sand |
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Answer: Option B
Explanation:
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133. |
Cores are used |
A. |
In symmetrical casting only |
B. |
To make castings sound |
C. |
To get smooth surface on castings |
D. |
To get cavity or recess in a casting |
E. |
To strengthen mould |
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Answer: Option D
Explanation:
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134. |
Molasses in a foundry shop is used |
A. |
For cleaning castings |
B. |
For preventing rusting of castings |
C. |
For making moulds |
D. |
For core making |
E. |
For use as a fuel in furnace |
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Answer: Option D
Explanation:
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135. |
Metal patterns are used for |
A. |
Precision castings |
B. |
Small castings |
C. |
Large castings |
D. |
Large scale production of castings |
E. |
Complicated castings |
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Answer: Option D
Explanation:
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136. |
Match plate pattern is used in |
A. |
Greens and moulding |
B. |
Pit moulding |
C. |
Machine moulding |
D. |
Bench moulding |
E. |
Pillar moulding |
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Answer: Option C
Explanation:
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137. |
Loams sand generally has |
A. |
34% clay and 5% moisture |
B. |
40% clay and 10% moisture |
C. |
50% clay and 18% moisture |
D. |
60% clay and 30% moisture |
E. |
70% clay and 30% moisture |
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Answer: Option C
Explanation:
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138. |
In shell moulding, the dimensional accuracy that can be expected is |
A. |
0.001 to 0.002 mm/mm |
B. |
0.003 to 0.005 mm/mm |
C. |
0.1 mm to 0.3 mm |
D. |
0.3 mm to 0.5 mm |
E. |
1 mm/mm |
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Answer: Option B
Explanation:
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139. |
Yellow colour on a pattern indicates |
A. |
Surface to be left unmachined |
B. |
Surface to be machined |
C. |
Core prints |
D. |
Seat for loose core prints |
E. |
Fillets |
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Answer: Option B
Explanation:
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140. |
Black broken lines on a pattern indicates |
A. |
Surface to be left unmachined |
B. |
Surfaces to be machined |
C. |
Core prints |
D. |
Seats for loose core prints |
E. |
Fillets |
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Answer: Option E
Explanation:
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