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A steel rod was subjected to a fluctuating stress cycle that varied between a maximum of 400 MPa in tension to a minimum of 300 MPa in compression. What is the stress amplitude, in MPa?______. (-Gate metallurgical engineering 2014)1 AnswerA body starts yielding when it is subjected to a stress state with principal stresses of 250 MPa, 50 MPa and −50 MPa. What is the yield strength of the material, in MPa, if Tresca yield criterion is obeyed? (-Gate metallurgical engineering 2014)1 AnswerA shaft with a circular cross-section is subjected to pure twisting moment. The ratio of the maximum shear stress to the largest principal stress isGate-20161 AnswerWhich one of following is NOT correct? (Gate mechanical engineering 2014)1 AnswerWhich one of the following plots relating shear stress with strain rate represents Newtonian behaviour of a fluid? (-Gate metallurgical engineering 2014)1 AnswerA thin cylindrical pressure vessel with closed-ends is subjected to internal pressure. The ratio of circumferential (hoop) stress to the longitudinal stress is Gate-20161 AnswerThe respective units for dislocation density and stress intensity factor are: (-Gate metallurgical engineering 2014)1 AnswerAs compared to the engineering stress-engineering st rain curve, the true stress-true strain curve for a given material, GATE- Metallurgical Engineering- 20131 AnswerIn a steel plate with bolted connections, the rupture of the net section is a mode of failure under -Civil Engineering-gate-20121 AnswerAn ideal Brayton cycle, operating between the pressure limits of 1 bar and 6 bar -gate-mechanical-20111 AnswerIf a small concrete cube is submerged deep in still water in such a way that the pressure exerted on all faces of the cube is p, then the maximum shear stress developed inside the cube is -Civil Engineering-gate-20121 AnswerA composite circular shaft is comprised of a steel core surrounded by an aluminum annulus, perfectly bonded to each other as shown in the fi gure. If it subjected to a pure torque, which one of the following statements is TRUE? GATE-1 AnswerWhat is the theoretical requirement of air (in m3 at STP) for the complete combustion of 100 m3 (at STP) of a fuel consisting of pure CH4? Assume that air contains 21 vol.% of oxygen. _____. (-Gate metallurgical engineering 2014)1 AnswerA thin cylinder of inner radius 500mm and thickness 10mm is subjected to an internal pressure of 5MPa. -gate-mechanical-20111 AnswerIf all the elements of one row of a 3 × 3 matrix are multiplied by 3, the determinant of the matrix changes by a factor of _____. (-Gate metallurgical engineering 2014)1 AnswerDefine breaking stress. A heavy wire is suspended from a roof and no weight is attached to its lower end. Is it under stress? -Physics Cbse class 11 1 AnswerWhich one of the following NDT techniques CANNOT be used to detect an internal crack in a steel shaft? (-Gate metallurgical engineering 2014)1 AnswerA diesel engine has a compression ratio of 17 and cut-off take place at 10% of the stroke. Assuming ratio of specific heats ( γ ) as 1.4, the air-standard efficiency (in percent) is______. (Gate mechanical engineering 2014)1 AnswerA sonometer wire of length 1.5 m is made of steel. The tension in it produce an elastic strain of 1%. What is the fundamental frequency of steel if density and elasticity of steel are 7.7 × 103 kg / m3 and 2.2 × 1011 N/m2 respectively ? - physics 20130 AnswerConsider a simple gas turbine (Brayton) cycle and a gas turbine cycle with perfect regeneration. In both the cycles, the pressure ratio is 6 and the ratio of the specific heats of the working medium is 1.4. The ratio of minimum to maximum temperature1 Answer