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Engineering-materials Questions Set 31:

Quiz Mode

Cast iron tends to be brittle.

True

False

Nothing

none of the above

Solution:

Dezincification of brass is prevented by the addition of

Zinc

Nickel

Tungsten

Arsenic

Solution:

What percentage of austenite is formed during the eutectic reaction?

6.67%

11.28%

4.3%

17.89%

Solution:

Hot-quenching of eutectoid steels in austenitic condition results in the formation of

Pearlite

Ferrite

Bainite

Cementite

Solution:

What type of refractory material is bauxite considered?

Silica refractory

Acid refractory

Basic refractory

Neutral refractory

Solution:

How much of each octahedral void at the edges of an FCC lattice belongs to each unit cell?

One-eighth

One-sixth

One-fourth

Half

Solution:

What effect does adding cobalt have on the properties of steel?

No change

Increases hardenability

Changes color

Decreases hardenability

Solution:

An infinite array of points in three-dimensional space in which each point is identically located with respect to others is known as

space lattice

Basis

Unit cell

Crystal

Solution:

A magnesium alloy containing 3% rare earth metal exhibits which of the following characteristics?

Good founding properties

Die-casting alloy

Good overall properties

Creep resistance up to 250°C

Solution:

Which of the following factors affect the dielectric strength of a material?

Decreases with a decrease in thickness

Decreases with an increase in humidity

Decreases with an increase in frequency

Decreases with an increase in temperature

Engineering-materials Questions Set 31:

Cast iron tends to be brittle.

Solution:

Dezincification of brass is prevented by the addition of

Solution:

What percentage of austenite is formed during the eutectic reaction?

Solution:

Hot-quenching of eutectoid steels in austenitic condition results in the formation of

Solution:

What type of refractory material is bauxite considered?

Solution:

How much of each octahedral void at the edges of an FCC lattice belongs to each unit cell?

Solution:

What effect does adding cobalt have on the properties of steel?

Solution:

An infinite array of points in three-dimensional space in which each point is identically located with respect to others is known as

Solution:

A magnesium alloy containing 3% rare earth metal exhibits which of the following characteristics?

Solution:

Which of the following factors affect the dielectric strength of a material?

Solution:

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