1) 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 e. may have any value
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2) Which of the following has no unit __________________? a. kinematic viscosity b. surface tension c. bulk modulus d. strain e. elasticity
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3) 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
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4) 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
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5) 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
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6) 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
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7) If the radius of wire stretched by a load is doubled, then its Young’s modulus will be_______________? a. doubled b. halved c. become four times d. become one-fourth e. remain unaffected
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8) A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________? a. uniform throughout b. increase uniformly c. first increase and then decrease d. increase uniformly first and then increase rapidly e. increase rapidly first and then uniformly
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9) 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
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10) Modulus of rigidity is defined as the ratio of_________________? a. longitudinal stress and longitudinal strain b. volumetric stress and volumetric strain c. lateral stress and lateral strain d. shear stress and shear strain e. linear stress and lateral strain
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11) It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called______________________? a. internal resistanpe b. tensile stress c. transverse stress d. compressive stress e. working stress
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12) The unit of Young’s modulus is__________________? a. mm/mm b. kg/cm c. kg d. kg/cm2 e. kg cm2
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13) Hooke’s law holds good up to____________________? a. yield point b. limit of proportionality c. breaking point d. elastic limit e. plastic limit
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14) The stress developed in a material at breaking point in extension is called__________? a. Breaking stress b. Fracture stress c. Yield point stress d. Proof stress
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