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Metal-casting Questions Set 27:

Quiz Mode

Core prints are prepared in molds to support what?

pattern

cores

chaplets

chills

Solution:

What type of sand is generally used for pit moulding?

Green sand

Dry sand

Loam sand

System sand

Solution:

What types of shapes can be produced using die casting?

Any shape

Circular

Hollow

Any complex shape

Solution:

A metal has a high castability index if it has:

Low melting temperature

High fluidity

Low affinity for surrounding gases

All of these

Solution:

What type of casting defect is caused by the trapping of gases in molten metal?

Shrinkage cavity

Gas defect

Pouring defect

Molding material defect

Solution:

Which of the following methods is used to trap slag from entering the steel casting mold?

Down gate method

Whirl gate method

Finn's method

Euler's method

Solution:

What types of materials are direct electric arc furnaces suitable for melting?

Gray cast iron

Steel

Both steel and gray cast iron

Nonferrous metals and alloys

Solution:

Which of the following methods are used for obtaining directional solidification for riser design?

Suitable placement of chills

Suitable placement of chaplets

Employing padding

All of the above

Solution:

A spherical drop of molten metal of radius 5 mm solidifies in 10 seconds. What will be the solidification time for a similar drop of diameter 30 mm?

560 seconds

80 seconds

90 seconds

160 seconds

Solution:

A spherical drop of radius 2 mm solidifies in 10 seconds. What will be the time taken to solidify when the radius of the spherical drop changes to 4 mm?

20 seconds

40 seconds

60 seconds

80 seconds

Metal-casting Questions Set 27:

Core prints are prepared in molds to support what?

Solution:

What type of sand is generally used for pit moulding?

Solution:

What types of shapes can be produced using die casting?

Solution:

A metal has a high castability index if it has:

Solution:

What type of casting defect is caused by the trapping of gases in molten metal?

Solution:

Which of the following methods is used to trap slag from entering the steel casting mold?

Solution:

What types of materials are direct electric arc furnaces suitable for melting?

Solution:

Which of the following methods are used for obtaining directional solidification for riser design?

Solution:

A spherical drop of molten metal of radius 5 mm solidifies in 10 seconds. What will be the solidification time for a similar drop of diameter 30 mm?

Solution:

A spherical drop of radius 2 mm solidifies in 10 seconds. What will be the time taken to solidify when the radius of the spherical drop changes to 4 mm?

Solution:

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