Foundry Technology

Castability have been used to describe certain aspects of flow behaviour, the term fluidity is most widely recognized.

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• FALSE

• NO INFORMATION

For a binary system of known composition and temperature at equilibrium, at least three kinds of information are available:

• the percentages or fractions of the phases

• Density of the phases

• the phases that are present

• the thermal properties of these phases

The principal methods of shaping metals may be classified in five groups, except:

• Casting

• Physical working

• Fabrication by joining

• Machining

• Powder metallurgy

Shrinkage defects in casting may generated during ...

• Mold Preparation

• Cleaning and Finishing

• Solidification and Cooling

• Pattern Preparation

Gross failure to meet these conditions produces the most serious defect in this group, the misrun or short run casting, in which the metal solidifies prematurely and some limb or section of the casting is omitted.

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AISI 1050 (0.5wt% C) at 800oC has .... phases.

• Ferrite + Cementite

• Austenite + Sementite

• Austenite + Liquid

• Ferrite + Austenite