The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called

A

Strain

B

Stress

C

Pressure

D

Modulus of elasticity

Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the

A

Ultimate tensile strength (U.T.S.)

B

Endurance limit

C

Elastic limit

D

None of these

Slow plastic deformation of metals under a constant stress is termed as __________ failure.

A

Fatigue

B

Endurance

C

Creep

D

None of these

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

You are the administrator of contoso.local domain. You organize the domain into organizational units as shown in the EXHIBIT. You configure the local security options and other settings for the default domain policy object You delegate administration of Michigan and Florida OU. You want to prevent those administrators from creating any other group policy objects with settings that conflict with those you configured.What should you do?

A

From the group policy options from the contoso.local domains set the option not override

B

From the group policy options from the Michigan and Florida OU, set the option not override

C

Block the group policy inheritance for the contoso.local domain

D

Block the group policy inheritance for Michigan and Florida OU

E

None of above

Deformation drag, which is caused by widespread deformation of fluid around the immersed body

A

Occurs when N_Re is very small

B

Is primarily a friction drag

C

Is independent of body length

D

Depends mainly on cross-sectional shape

The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is

A

Same

B

Double

C

Half

D

Four times

The deformation of a bar under its own weight is _________ the deformation, if the same body is subjected to a direct load equal to weight of the body.

A

Equal to

B

Half

C

Double

D

Quadruple

A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was

A

Mild steel

B

Cast iron

C

Glass

D

Copper

When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids?

A

At high fluid velocity

B

At low velocity

C

When fluid flows past a smooth surface

D

None of these

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

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