Chapter 5, Problem 5.14P

A 6305 ball bearing is subjected to a steady 5000-N radial load and a 2000-N thrust load and uses a very clean lubricant throughout its life. If the inner race angular velocity is 500rpm find (a) The equivalent radial load (b) The L10 life (c) The L50 life

Determine the Mean Effective Pressure (MEP) in [bar] for a 4-cylinder, 2-Stroke engine with a bore of 85.7 mm, and a stroke of 65.8 mm, that produces 85 hP at 5000 rpm. (Hint: Be careful with units). Note: 1 hP = 0.7457 kW; 100 kPa = 1 bar

Ibraheem Super Q3: A boiler as shown in the figure below is producing 2 kg/s saturated steam at 240C. The water enters the boiler at 24C. The boiler efficiency is 80%. Patm=1.05 bar .Determine: (10 Marks) 1- The inlet pressure of the turbine. 2- If a gauge pressure connected to the outlet pipe, what is the reading of this gauge? 3- Calculate the required diesel in [kg/s]. Assume the calorific value of the diesel is 45000 kJ/kgf 4- Calculate the equivalent evaporation of the boiler 5- Keeping the same inlet conditions and fuel consumption, determine the turbine efficiency if the produced steam was saturated at 300C. Steam Cut Hot Gasses Out Ts=240C Boiler FURNACE A Water In C 24 Examiner Head of Department Ahmad. A. M. Alsak lani