Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

A

More

B

Less

C

Same

D

More/less depending on composition

The allowable tensile stress in structural mild steel plates for steel tank is assumed as

A

95.0 MPa on net area

B

105.5 MPa on net area

C

105.5 MPa on gross area

D

150.0 MPa on gross area

A tensile test is performed on a mild steel round bar. Its diameter after fracture will

A

Remain same

B

Increase

C

Decrease

D

Depend upon rate of loading

The hardness and tensile strength in austenitic stainless steel can be increased by

A

Hardening and cold working

B

Normalizing

C

Martempering

D

Full annealing

After reaching the yielding stage while testing a mild steel specimen, strain

A

Becomes constant

B

Starts decreasing

C

Increases without any increase in load

D

None of the above

Elasticity of Mild Steel specimen is defined by

A

Hooke’s law

B

Yield point

C

Plastic flow

D

Proof stress

The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.

A

Equal to

B

Less than

C

More than

D

None of these

The ultimate tensile stress for mild steel is __________ the ultimate compressive stress.

A

Equal to

B

Less than

C

More than

D

None of these

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

A

Same

B

More

C

Less

D

Unpredictable

The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

A

1400 kg/cm²

B

190 kg/cm²

C

260 kg/cm²

D

230 kg/cm²

Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

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