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Metal-casting Questions Set 7:

Quiz Mode

The process of removing unwanted materials from a casting is called:

fettling

cleaning

finishing

blowing

Solution:

The velocity of the molten metal stream at the base of a sprue of height h is equal to

√(gh)

√(2gh)

2√(gh)

√(gh/2)

Solution:

Which material is most commonly used as a die material in gravity die casting?

Lead

Grey cast iron

Aluminum

Magnesium

Solution:

If the volume of a casting is V and the surface area is A, the solidification time will be proportional to

V/A

(V/A)^3

(V/A)^2

(V/A)^4

Solution:

The investment casting process uses patterns made of

thermosetting resin

synthetic sand

wax with polystyrene filler

special plastics

Solution:

An expendable pattern is used in which of the following casting processes?

Slush casting

Squeeze casting

Centrifugal casting

Investment casting

Solution:

Light impurities in the molten metal are prevented from reaching the mold cavity by providing a:

strainer

bottom well

skim bob

all of the above

Solution:

What is the primary purpose of using cores in casting processes?

To produce intricate castings by placing these items inside the mold cavity on core prints

To strengthen and support the pattern

To increase the surface finish of castings

To enhance the permeability of sand

Solution:

Consider a component cast using Horizontal Centrifugal Casting. The G-Factor range of this type of casting is 60-80. The inside diameter of the mold is 20 m. What is the correct RPM range (N) for this type of casting process? (Take g = 10 m/s² and π² = 10)

None of the Above

10 * √60 ≤ N ≤ 10 * √80

10 * √50 ≤ N ≤ 10 * √70

10 * √54 ≤ N ≤ 10 * √72

Metal-casting Questions Set 7:

The process of removing unwanted materials from a casting is called:

Solution:

The velocity of the molten metal stream at the base of a sprue of height h is equal to

Solution:

Which material is most commonly used as a die material in gravity die casting?

Solution:

If the volume of a casting is V and the surface area is A, the solidification time will be proportional to

Solution:

The investment casting process uses patterns made of

Solution:

An expendable pattern is used in which of the following casting processes?

Solution:

Light impurities in the molten metal are prevented from reaching the mold cavity by providing a:

Solution:

What is the primary purpose of using cores in casting processes?

Solution:

Consider a component cast using Horizontal Centrifugal Casting. The G-Factor range of this type of casting is 60-80. The inside diameter of the mold is 20 m. What is the correct RPM range (N) for this type of casting process? (Take g = 10 m/s² and π² = 10)

Solution:

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