Argentite is the principal ore or raw material for _________________?

Question: Which of the following statement is true about brittle fracture?
[A].

High temperature and low strain rates favour brittle fracture

[B].

Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

[C].

Brittle fracture is always preceded by noise

[D].

Cup and cone formation is characteristic for brittle materials

Answer: Option B

Explanation:

No answer description available for this question.

Question: Grey cast iron has
[A].

carbon in the form of free graphite

[B].

high tensile strength

[C].

low compressive strength

[D].

all of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: The blade of a power saw is made of
[A].

boron steel

[B].

high speed steel

[C].

stainless steel

[D].

malleable cast iron

Answer: Option B

Explanation:

No answer description available for this question.

Question: Nickel when added to copper improves
[A].

machinability

[B].

hardness

[C].

hardness and strength

[D].

strength and ductility

Answer: Option B

Explanation:

No answer description available for this question.

Question: Iron-carbon alloys containing 4.3% carbon are known as hypo-eutectic cast irons.
[A].

Correct

[B].

Incorrect

Answer: Option B

Explanation:

No answer description available for this question.