Design Questions Set 15:
The best suitable method for optimum design is based on
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When the frictional force helps to apply the brake, then the brake is said to be
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Find the shaft speed if the belt speed is 1.56 m/s and the diameter of the pulley is 750 mm.
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White cast iron has:
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According to the maximum distortion energy theory, the predicted ratio of shear stress to direct stress at the yield condition for a steel specimen is:
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Which of the following formulas is used to calculate the oil-film thickness in hydrodynamic bearings?
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Determine the shape of the region of safety from the maximum principal stress theory, if the compressive yield stress and tensile yield stress are equivalent.
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For disk and pad arrangement, an increase of braking torque is not dependent on which of the following?
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A ductile material has Se=196 N/mm2, Sy=294 N/mm2, and is subjected to a variable load with stress ranging from 147 N/mm2 to 49 N/mm2. The Fatigue stress factor is 1.32. Calculate the Factor of Safety (FOS) using Soderberg's criteria.
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Find the area of cross-section of rope for a design of hoisting mechanism considering the following data: Stress factor is 6, Maximum tension is 26.315 kN, Ratio of Dmin/d is 23, ultimate tensile is 180 kgf/mm².
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