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last reply by CpjJwWHV • 10 years ago • asked in Mechanical Engineering, 2011
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A triangular – shaped cantilever beam of uniform – thickness is shown in the figure. The Young’s modulus of the material of the beam is E. A concentrated load P is applied at the free end of the beam.
[1] The area moment of inertia about the neutral axis of a cross – section at a distance x measure from the free end is [2 marks]
(A) bxt3/6l
(B) bxt3/24l
(C) bxt3/12l
(D) xt3/12[2] The maximum deflection of the beam is [2 marks]
(A) 24Pl3/Ebt3
(B) 8Pl3/Ebt3
(C) 12Pl3/Ebt3
(D) 6Pl3/Ebt3asked in Mechanical Engineering, 2011
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The temperature and pressure of air in a large reservoir are 400 K and 3 bar respectively. A converging – diverging nozzle of exit area 0.005m2 is fitted to the wall of the reservoir as shown in the figure. The static pressure of air at the exit section or isentropic flow though the nozzle is 50 kPa. The characteristic gas constant and the ratio of specific heats of air are 0.287 kJ.kgK and 1.4 respectively.
[1] The density of air in kg/m3 at the nozzle exit is [2 marks](A) 0.560
(B) 0.600
(C) 0.727
(D) 0.800[2] The mass flow rate of air through the nozzle in kg/s is [2 marks]
(A) 1.30
(B) 1.77
(C) 1.85
(D) 2.06asked in Mechanical Engineering, 2011
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