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Questions Bank (1453295 total)
The diameter of a thin spherical pressure vessel is 255 mm and the wall thickness is 5 mm. The pressure applied to the vessel is 14 MPa. Calculate the minimum ultimate tensile strength required for the vessel if the factor of safety for the design is 1.77. Answer to be in MPa to 2 decimal places
The diameter of a thin sphere is 235 mm and the wall thickness is 4 mm. If the hoop stress in the vessel is 67.4 MPa calculate the internal pressure P in MPa to 2 decimal places.
A solid circular section shaft rotating at 2 rev/sec is required to transmit 154 kW. The ultimate shear strength of the material is 112 MPa. Calculate the minimum required shaft diameter if the factor of safety is 1.92
The assembly ABCD shown in Fig Q3 is made of three hollow shafts. The end A is fixed and the couplings at B and C joins the three shafts together. The diameters d of the three shafts are 81, 56 and 38 mm respectively. Each shaft has a wall thickness of 4 mm. The lengths l are 116, 105 and 84 mm respectively. A torque of 2.1 kNm is applied about the axis of the shaft at the end D. Calculate the angle of twist of the assembly at the free end D of the shaft in degrees. The shear modulus of the shafts is 80 GPa? Answer in degrees to 2 decimal places.
A driveshaft is 394 mm long and has a diameter of 20 mm. The modulus of rigidity for the material is 71 GPa. Calculate the angle of twist for the shaft when it is subjected to a peak torque of 328 Nm. Convert your answer to degrees, to 2 decimal places.
A student is designing driveshafts for the Formula student race car. The existing driveshafts are solid and have an outer diameter of 23 mm. If the peak torque transmitted by the driveshafts is 314 Nm, what is the maximum shear stress in the shaft? Answer in MPa to 2 decimal places.