The percentage reduction in area of acast iron specimen during tensile test would be of the order of…
more than 50%
10—25%
25—50%
negligible.
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Flow stress corresponds to…
fluids in motion
breaking point
rupture stress
plastic deformation of solids
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Rivets are made of following type of material….
ductile
tough
resilient
hard
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Longitudinal stress in a thin cylinder is…
twice the hoop stress
one-fourth of hoop stress
half of the hoop stress
equal to the hoop stress
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In question 56, the internal reaction in bottom 80 cm length will be….
different in both cases
data are not sufficient to determine same
zero in first case
same in both cases
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A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be…
50 MN/m2
30 MN/m2
100 MN/m2
200 MN/m2
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The ratio of lateral strain to the linear strain within elastic limit is known as…
bulk modulus
modulus of rigidity
Poisson’s ratio.
Young’s modulus
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If the radius of wire stretched by a load is doubled, then its Young’s modulus will be…
remain unaffected.
halved
become four times
become one-fourth
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The unit of Young’s modulus is…
kg/cm2
kg
kg/cm
mm/mm
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The safe twisting moment for a compound shaft is equal to the…
extreme value
maximum calculated value
mean value
minimum calculated value
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