The property of sand to withstand the high temperature of the molten metal without fusing or breakdown is known as
A.refractoriness
B.cohesiveness
C.porosity
D.adhesiveness
Category: Foundry Technology Mcqs
A spoke shave is a
A.planing tool
B.sawing tool
C.layout tool
D.boring tool
Head storage capacity of moulding sand can be increased by adding?
A.graphite
B.chromite
C.magnesium powder
D.any of the above
Clay content of green sand is usually
A.1 to 3 percent
B.5 to 10 percent
C.18 to 30 percent
D.30 to 50 percent
The water content of green sand is usually
A.1 to 2 percent
B.6 to 8 percent
C.12 to 18 percent
D.20 to 25 percent
Which of the following statement about core is incorrect?
A.core should be permeable to escape of core gases
B.core should be capable of collapsing shortly after the molten metal has solidified around it
C.core should produce maximum amount of gas when in contact with molten metal
D.core should be capable of collapsing after the molten metal has solidified around it
The lower portion of the moulding flasks are known as
A.Cope
B.Drag
C.Cheek
A designer would attempt to avoid bosses and pads in the casting because
A.it is difficult to incorporate in pattern
B.mould formation is difficult in pressence of boss
C.projections such as bosses and pads can not merge with thinner sections
D.they being thicker will take longer to solidify and hence will suffer from residual stresses and coarse grains
Sodium silicate in sand in often used as
A.substitute of clay
B.binder
C.refractory material
D.permeability promotion agent
Slag in a blast furnace is
A.lighter than molten iron
B.heavier than molten iron
