1. A compressor receives the shaft work to decrease the pressure of the fluid. 2

Question

1. A compressor receives the shaft work to decrease the pressure of the fluid. 2. The mass flow rate of the fluid remains constant in all steady flow process. 3. The kinetic energy of a fluid decreases as it flows through a diffuser. 4. During a steady flow process, the change of energy with respect to time is zero. 5. Fluids at rest possess no flow energy. 6. The temperature of air decreases as it is compressed by an adiabatic compressor. 7. The kinetic energy of a fluid decreases as it is accelerated in an adiabatic diffuser T F T F T F T F

Explanation / Answer

1)

false

Because compressor increases the pressure of the fluid by shaft work

2)

flase

steady flow system is applied for open system. in an open system mass enters in and out

3)

true

diffuser is used to convert velocity to pressure

4) False

for steady flow process proporties may change

5) true

pv= flow energy will be zero for stationary fluid (v=specific volume)

6)

false

the temprature of air increases as it is compressed by an adiabatic compressor

7)

false

the KE of a fluid increases as it is accelerated in an adiabatic diffuser

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