Related Questions

The ductility of a material __________ with the increase in percentage reduction in area of a specimen under tensile test.
A Increases
B Decreases
C Remains same
D None of these
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 percentage reduction in area of a cast iron specimen during tensile test would be of the order of
A More than 50%
B 25 - 50%
C 10 - 25%
D Negligible
In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress.
A Decreases slowly
B Increases slowly
C Decreases more quickly
D Increases more quickly
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test
A Brinell
B Rockwell
C Vickers
D None of the above
A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is
A $$\frac{{\text{L}}}{{\text{d}}}$$
B $$\frac{{\text{L}}}{{2{\text{d}}}}$$
C $${\left( {\frac{{\text{L}}}{{2{\text{d}}}}} \right)^2}$$
D $${\left( {\frac{{\text{L}}}{{3{\text{d}}}}} \right)^2}$$
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
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
A Normal to both current and magnetic field
B In the direction of current
C Antiparallel to magnetic field
D In arbitrary direction
Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
A Normal to both current and magnetic field
B In the same direction as current
C In a direction anti parallel to magnetic field
D None of the above
The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.
A Yield point
B Breaking
C Ultimate
D None of these

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