GATE 2018 ME (ME1) – Question 55
Steam passes through a nozzle at 0.1 kg/s with heat loss 5 kW. Inlet and outlet enthalpies are 2500 and 2350 kJ/kg. Inlet speed is negligible. Exit speed, to two decimals, is ______ m/s.
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Correct answer: 445.00 to 450.00
Explanation
The visual source specifies 0.1 kg/s. Heat loss per mass is $5/0.1=50$ kJ/kg. Energy balance gives $C_2^2/2=(2500-2350-50)1000=100000$ J/kg. Therefore $C_2=447.21$ m/s. Native text misreads the flow as 1.0 kg/s.