3) Four cylinder, 3.5 liter SI engine operates on a four stroke cycle at 2500 rpm. At this condition, mechanical efficiency of the engine is 62% and 1000 J indicated work are produced each cycle in each cylinder. You are calculate: a) Indicate mean effective pressure, kPa b) Break mean effective pressure, kPa c) Friction mean effective pressure, kPa d) Break power in kW, hp e) Torque, N.m

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1)  A plot of pump net head is shown below. Two curves are drawn: blue color curve and red color curve. Which one is called pump performance curve? Will the location of pump performance curve change if the velocity of the fluid at pump outlet changes? a) red curve; No, the location will not change b) blue curve; yes, the location will change c) red curve; yes, the location will change d) blue curve; No, the location will not change 2) In a turbine system, states A and B are homologous. If the net head ratio HA/HB =16 , volume flow rate ratio VA˙/VB˙=9. What is the diameter ratio DA/DB ? a) 3/2 b) 6 c) 12 d) 2/3

A gas turbine has a pressure ratio of 6:1. The inlet temperature to the compressor is 20°C. The outlet temperature from the compressor is 180°C. The inlet temperature to the turbine is 920˚C. Find: a) The gas turbine thermal efficiency. b) The outlet temperature from the turbine. c) The net output power if the inlet heat power is 160 MW.