orrect explanationof Athe correct explanation ofAiven figure, the stress in fibre AB[IES-1995].5xe(Compressive)mlyumanW1mlyt 1ahe]idisFor-2020 (IES,GATE, PSUs)Page 285 of 493Rev.0

Chapter-6Bending Stress in BeamS K Mondal’s(c). .5xxPP eAI(Compressive)(d) P/A (Compressive)IES-11b.A rectangular strut is 150 mm wide and 120 mm thick. It carries a load of 180 kN atan eccentricity of 10 mm in a plane bisecting the thickness as shown in the figure:The maximum intensity of stress in the section will be[IES-2019 Pre.](a) 14 MPa(b) 12 MPa(c) 10 MPa(d) 8 MPaIES-12.A column of square section 40 mm × 40mm, fixed to the ground carries aneccentric load P of 1600 N as shown inthe figure.If the stress developed along the edgeCD is –1.2 N/mm2, the stress along theedge AB will be:(a) –1.2 N/mm2(b) +1 N/mm2(c) +0.8 N/mm2(d) –0.8 N/mm2[IES-1999]IES-12a.A pull of 100 kN acts on a bar as shown in the figure in such a way that it isparallel to the bar axis and is 10 mm away from xx:[IES-2019 Pre.]For-2020 (IES,GATE, PSUs)Page 286 of 493Rev.0

Chapter-6Bending Stress in BeamS K Mondal’sThe maximum bending stress produced in the bar atxxis nearly(a) 20.5 N/mm2(b) 18.8 N/mm2(c) 16.3 N/mm2(d) 14.5 N/mm2IES-13.Ashortcolumnofsymmetriccross-section made of a brittle material issubjected to an eccentric vertical load Pat an eccentricity e. To avoid tensilestressintheshortcolumn,theeccentricity e should be less than or equalto:(a) h/12(b) h/6(c) h/3(d) h/2[IES-2001]IES-14.A short column of external diameter D and internal diameter d carries an eccentricload W. Toe greatest eccentricity which the load can have without producing tensionon the cross-section of the column would be:[IES-1999]222222(a)(b)(c)(d)8888DdDdDdDddDIES-15The ratio of the core of a rectangular section to the area of the rectangular sectionwhen used as a short column is[IES-2010](a)19(b)136(c)118(d)124Previous 25-Years IAS QuestionsBending equationIAS-1.Consider the cantilever loaded as shown below:[IAS-2004]For-2020 (IES,GATE, PSUs)Page 287 of 493Rev.0

Chapter-6Bending Stress in BeamS K Mondal’sWhat is the ratio of the maximum compressive to the maximum tensile stress?(a) 1.0(b) 2.0(c) 2.5(d) 3.0IAS-2.A 0.2 mm thick tape goes over a frictionless pulley of 25 mm diameter. If E of thematerial is 100 GPa, then the maximum stress induced in the tape is:[IAS 1994](a)100 MPa(b) 200 MPa(c)400 MPa(d) 800 MPaSection ModulusIAS-3.A pipe of external diameter 3 cm and internal diameter 2 cm and of length 4 m issupported at its ends. It carries a point load of 65 N at its centre. The sectionalmodulus of the pipe will be:[IAS-2002](a)36564cm(b)36532cm(c)36596cm(d)365128cmIAS-4.A Cantilever beam of rectangular cross-section is 1m deep and 0.6 m thick. If thebeam were to be 0.6 m deep and 1m thick, then the beam would.[IAS-1999](a)Be weakened 0.5 times(b)Be weakened 0.6 times(c)Be strengthened 0.6 times(d)Have the same strength as the original beam because the cross-sectional area remainsthesameFor-2020 (IES,GATE, PSUs)Page 288 of 493Rev.0

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Tensile strength, Lo