11. 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.
Ans: b
12. 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.
Ans: b
13. 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.
Ans: a
14. 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.
Ans: b
15. Percentage reduction of area in performing tensile test on cast iron may be of the order of
(a) 50%
(b) 25%
(c) 0%
(d) 15%
(e) 60%.
Ans: c
16. 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: d
17. True stress-strain curve for materials is plotted between
(a) load/original cross-sectional area and change in length/original length
(b) load/instantaneous cross-sectional area original area and log.
(c) load/instantaneous cross-sectional area and change in length/original length
(d) load/instantaneous area and instantaneous area/original area
(e) none of the above.
Ans: b
18. During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is
(a) 4 tonnes/cm2
(b) 8 tonnes/cm2
(c) 16 tonnes/cm2
(d) 22 tonnes/cm2
(e) none of the above.
Ans: b
19. For steel, the ultimate strength in shear as compared to in tension is nearly
(a) same
(b) half
(c) one-third
(d) two-third
(e) one-fourth.
Ans: b
20. Which of the following has no unit
(a) kinematic viscosity
(b) surface tension
(c) bulk modulus
(d) strain
(e) elasticity.
Ans: d
Read More Questions:
Strength of Materials - Mechanical Engineering MCQs Part1
Strength of Materials - Mechanical Engineering MCQs Part2
(a) same
(b) more
(c) less
(d) more or less depending on other factors
(e) unpredictable.
Ans: b
12. 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.
Ans: b
13. 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.
Ans: a
14. 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.
Ans: b
15. Percentage reduction of area in performing tensile test on cast iron may be of the order of
(a) 50%
(b) 25%
(c) 0%
(d) 15%
(e) 60%.
Ans: c
16. 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: d
17. True stress-strain curve for materials is plotted between
(a) load/original cross-sectional area and change in length/original length
(b) load/instantaneous cross-sectional area original area and log.
(c) load/instantaneous cross-sectional area and change in length/original length
(d) load/instantaneous area and instantaneous area/original area
(e) none of the above.
Ans: b
18. During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is
(a) 4 tonnes/cm2
(b) 8 tonnes/cm2
(c) 16 tonnes/cm2
(d) 22 tonnes/cm2
(e) none of the above.
Ans: b
19. For steel, the ultimate strength in shear as compared to in tension is nearly
(a) same
(b) half
(c) one-third
(d) two-third
(e) one-fourth.
Ans: b
20. Which of the following has no unit
(a) kinematic viscosity
(b) surface tension
(c) bulk modulus
(d) strain
(e) elasticity.
Ans: d
Read More Questions:
Strength of Materials - Mechanical Engineering MCQs Part1
Strength of Materials - Mechanical Engineering MCQs Part2
No comments:
Post a Comment