Approximate horse power that can be transmitted by a shaft 60 mm diameter at 180 r.p.m. with permissible shear stress of 850 kg/cm2, would be

Related MCQs

• A solid shaft and a hollow shaft are to be of equal strength in torsion. The hollow shaft is to be 10% larger in diameter than the solid shaft. The ratio of the weight of the hollow shaft will be (both shafts being made of same material)
• The frictional horse power loss in a bearing having 25 mm diameter subjected to a load of 200 kg rotating at 600 rpm will be of the order of
• A circulating water pump of a condenser is of the centrifugal type and directly connected to a three phase induction motor running at 900 rpm. The pump delivers 30,000 litres per minute against the dynamic head of 10 m. The horse power of the motor required to drive the pump would be
• In a gas turbine rotor a radial stress of 300 kg/sq cm tensile and 500 kg/sq cm tangential stress have been found at a point. The maximum shear stress at this point would be
• A solid shaft of 100 mm diameter transmits 100 HP at (450/?) r.p.m. The torque in kg-m on the shaft would be
• The ratio of maximum shear stress to average shear stress for a circular section is
• A key and a shaft are made from the same material. The key is rectangular with a width of D/4 and a height of 3D/16. The shaft is under torsion only. The necessary length of the key for equal strength of the shaft and key will be
• A spherical metal vessel 120 cm diameter is subjected to an internal pressure of 15 kg/sq cm. If the permissible stress is 625 kg/sq cm and the efficiency of the riveted joints is 75%, the required thickness of the plate would be
• A spherical gas tank is made of 1 cm steel plate hemispheres but welded together. The tank is 1503 cm in diameter. The allowable internal pressure to which tank may be subjected is the permissible stress be limited to 840 kg/sq cm would be in the range
• With a punch for which the maximum crushing stress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punched in the plate would be of diameter equal to