1 Circle the correct answer The volume flow rate remains con

1. Circle the correct answer: The volume flow rate remains conserved during a steady-flow process through a turbine.

True           False

2. Fill in the blank: A turbine is a device that extracts __________________ from a moving gas or liquid in order to do _________________ by turning a shaft.

Air flows through a 28-cm diameter pipe steadily as heat is supplied. Inlet conditions are 200kPa 20degrees C 5m/s and exit conditions are 180kPa and 40C. The molecular weight of air is 28.97 kg/kmol. What is the exit velocity of the flow? Choose the closest answer.

a. 5.94 m/s b. 23. 84 m/s c. 8.23 m/s d. 11.92 m/s

Solution

1.At steady state mass flow rate is constant..Mass in flow not equal to mass out flow..

m=Density*A*V will be not be same as density varies

But volune flow rate Q=AV in flow and out flow will be same

Hence It is TRUE

2.A turbine is a mechanical device that extracts energy from a fluid flow and converts it into useful work by turning a shaft.