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Metal-casting Questions Set 17:

Quiz Mode

What is the value of solid shrinkage allowance for cast iron?

10mm/m

5mm/m

20mm/m

13mm/m

Solution:

Which of these is a refractory powder used in ceramic mold casting?

Magnesia

Zircon

Helium

Argon

Solution:

For what type of pattern is double shrinkage allowance used?

single piece pattern

split pattern

gated pattern

master pattern

Solution:

Which of the following engineering materials is the most suitable candidate for hot chamber die casting?

Low carbon steel

Titanium

Copper

Tin

Solution:

Sweep and segmental patterns are suitable for:

axis symmetrical castings

round castings

deep castings

odd shaped castings with parting line not in one plane

Solution:

The purpose of a riser in metal casting is to:

Freeze after the casting freezes

Freeze before the casting freezes

Freeze at the same time as the casting

Minimize the time of pouring

Solution:

In centrifugal casting, the lighter impurities are

Collected at the center of the casting

Uniformly distributed

Forced towards the outer surface

Trapped near the mean radius of the casting

Solution:

A cubical casting of side 50 mm undergoes 1%, 2% and 3% volume shrinkage during the liquid state, phase transition and solid state, respectively. The volume of metal compensated from the riser is:

Solution:

Generally, risers are not required for casting of gray cast iron because

liquid shrinkage is negligible

solid shrinkage is negligible

the liquid shrinkage is compensated by solid shrinkage

none of the above

Solution:

Permeability is

the capability of permitting the gas evolved during the molding process

the property to withstand expansion or contraction of the molten mental

the capability of molding sand to withstand its own weight

the capability to withstand against self-weight and pressure of molten metal

Metal-casting Questions Set 17:

What is the value of solid shrinkage allowance for cast iron?

Solution:

Which of these is a refractory powder used in ceramic mold casting?

Solution:

For what type of pattern is double shrinkage allowance used?

Solution:

Which of the following engineering materials is the most suitable candidate for hot chamber die casting?

Solution:

Sweep and segmental patterns are suitable for:

Solution:

The purpose of a riser in metal casting is to:

Solution:

In centrifugal casting, the lighter impurities are

Solution:

A cubical casting of side 50 mm undergoes 1%, 2% and 3% volume shrinkage during the liquid state, phase transition and solid state, respectively. The volume of metal compensated from the riser is:

Solution:

Generally, risers are not required for casting of gray cast iron because

Solution:

Permeability is

Solution:

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