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Engineering :: Production Engineering

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    
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    
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    
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    
135.  Metal patterns are used for
A. Precision castings B. Small castings
C. Large castings D. Large scale production of castings
E. Complicated castings    
136.  Match plate pattern is used in
A. Greens and moulding B. Pit moulding
C. Machine moulding D. Bench moulding
E. Pillar moulding    
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    
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    
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    
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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