A man who weighs 600 N is sitting in a chair with his feet on the floor and arms resting on the armrests. The chair weighs 100 N. Each armrest exerts an upward force of 25.0 N on his arms, and the seat exerts an upward force of 500 N. What force does the floor exert on his feet? Multiple Choice 75 N upward 500 N upward 525 N upward 50 N upward ΟΝ

Fill the balks with the correct word/words d-For turbulent flow, Reynold Number is e- A pump is a rotodynamic pump that converts mechanical energy to hydraulic pressure energy. f- turbine can be used in rivers, man-made channels, tidal waters. g- The First Law of Thermodynamic state that__ h- i- is a change in the system from one equilibrium state to another. transfer heat from low to high temperature stages by using mechanical work. j- Adiabatic process means

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IKT f 327 DXD 187 S 487

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04 05 a Explain the reasons for the following: 1- The pure aluminum and the copper are generally rated as easy to machine 2- In ultrasonic machining, the stress produced by the impact of abrasive particles on the workpiece surface is high. 3- In rolling process, the coefficient of friction must be sufficient. 4- Difference in solidification between casting and welding processes. 5- Why is it desirable to use energy sources for welding that have high heat densities? 6- Why there might be a change in the density of a forged product as compared to that of the cast blank. D. A cylindrical workpart with D=2.5 in and h=2.5 in is upset forged in an open die to a height = 1.5 in. Coefficient of friction at the die -work interface = 0.10 The work material has a flow curve defined by: K= 40,000 lb/in' and n-0.15. Determine the instantaneous force in the operation (a) just as the yield point is reached (yield at strain = 0.002), (b) at height = 2.3 in. (c) h= 1.9 in, and (d) h = 1.5 in. a List…

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Which of the following choices is correct.1 regarding the right sequence of combustion process phases of Sl engines špark ignition - combustion - turbulence - exhaust špark ignition - early fame development - flame propagation - flame termination Intake - compression - power - exhaust O Fuel injection - combustion - flame propagation - auto-ignition Ignition delay in spark ignition engine can .2 be defined as The period between start of injection .and start of combustion The period between spark onsets and start of combustion The period between spark onsets and actual change in pressure rise The period between spark onsets and start of auto-ignition Severe auto-ignition (knock) can effect the .3 :following parts of the engine The piston O Piston rings C Engine head O Head gasket O All of the above O

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