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Machine design
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ A wood-ruff key is. capable of tilting in a recess milled out in the shaft [other wrong options] [Discuss in forum] a tapered key with head at one end fitted in pairs at right angles all of the above |
Q22 ⇒ Stress concentration in cyclic loading is more serious in ductile materials [other wrong options] [Discuss in forum] brittle materials equally serious in both cases depends on other factors unpredictable. |
Q23 ⇒ The property of a material which enables it to be drawn into wires with the application of a tensile force, is called. ductility [other wrong options] [Discuss in forum] plasticity elasticity malleability |
Q24 ⇒ In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that. all of the above [other wrong options] [Discuss in forum] the effect of curvature of the cylinder wall is neglected the tensile stresses are uniformly distributed over the section of the walls the effect of the restraining action of the heads at the end of the pressure vessel is neglected |
Q25 ⇒ Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to completely reversed loading [other wrong options] [Discuss in forum] dynamic loading static loading combined static and dynamic loading all of the above. |
Q26 ⇒ Lewis equation in gears is used to find the. compressive stress in bending [other wrong options] [Discuss in forum] tensile stress in bending shear stress fatigue stress |
Q27 ⇒ According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by. 2 mm for rivet diameter from 39 mm to 48 mm [other wrong options] [Discuss in forum] 0.5 mm upto rivet diameter of 24 mm 1 mm for rivet diameter from 27 mm to 36 mm all of the above |
Q28 ⇒ Pick up wrong statement. Fatigue strength can be increased by hot working [other wrong options] [Discuss in forum] cold working shot peening grinding and lapping surface using gradual changes of section. |
Q29 ⇒ A shaft is designed on the basis of rigidity and stiffness. Correct [other wrong options] [Discuss in forum] Incorrect Both (a) and (b) None of these |
Q30 ⇒ A connecting rod should be. equally strong in buckling about X-axis and Y-axis [other wrong options] [Discuss in forum] strong in buckling about X-axis strong in buckling about Y-axis any one of the above |
Q31 ⇒ Which of the following is not correct procedure to increase the fatigue limit surface decarburisation [other wrong options] [Discuss in forum] cold working shot peening under-stressing all of the above. |
Q32 ⇒ The diameter of the rivet hole is usually __________ the nominal diameter of the rivet. more than [other wrong options] [Discuss in forum] equal to less than none of these. |
Q33 ⇒ A basic hole is one whose. lower deviation is zero [other wrong options] [Discuss in forum] upper deviation is zero lower and upper deviations are zero none of these |
Q34 ⇒ Coaxing is the procedure of increasing fatigue limit by overstressing the metal by successively increasing loadings [other wrong options] [Discuss in forum] metal strength by cycling metal hardness by surface treatment metal resistance to corrosion by coating none of the above. |
Q35 ⇒ In designing a connecting rod, it is considered like __________ for buckling about Y-axis. both ends fixed [other wrong options] [Discuss in forum] both ends hinged one end fixed and the other end hinged one end fixed and the other end free |
Q36 ⇒ A screw is specified by its. major diameter [other wrong options] [Discuss in forum] minor diameter pitch diameter pitch |
Q37 ⇒ The notch angle of the Izod impact test specimen is 45° [other wrong options] [Discuss in forum] 10° 20° 30° 60°. |
Q38 ⇒ If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value? Maximum principal stress theory [other wrong options] [Discuss in forum] Maximum shear stress theory Maximum strain energy theory Maximum distortion energy theory |
Q39 ⇒ The temperature required for full annealing in hyper-eutectoid steel is. 50°C above upper critical temperature [other wrong options] [Discuss in forum] 50°C below upper critical temperature 50°C above lower critical temperature 50°C below lower critical temperature |
Q40 ⇒ In Vicker's hardness testing, the pyramid indentor apex is 136° [other wrong options] [Discuss in forum] 40° 122° 152° 161°. |
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