1. The ultimate tensile stress of mild steel compared
to ultimate compressive stress is
(a) same
(b) more
(c) less
(d) more or less depending on other factors
(e) unpredictable.
2. Tensile strength of a material is obtained by dividing
the maximum load during the test by the
(a) area at the time of fracture
(b) original cross-sectional area
(c) average of (a) and (b)
(d) minimum area after fracture
(e) none of the above.
3. The impact strength of a material is an index of its
(a) toughness
(b) tensile strength
(c) capability of being cold worked
(d) hardness
(e) fatigue strength.
4. The Young's modulus of a wire is defined as the stress
which will increase the length of wire compared to
its original length
(a) half
(b) same amount
(c) double
(d) one-fourth
(e) four times.
5. Percentage reduction of area in performing tensile
test on cast iron may be of the order of
(a) 50%
(6) 25%
(c) 0%
(d) 15%
(e) 60%.
6. The intensity of stress which causes unit strain is
called
(a) unit stress
(b) bulk modulus
(c) modulus of rigidity (d) modulus of elasticity
(e) principal stress
Ans
1 b 2 b 3 a 4 b 5 c 6 d
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