In an ideal boiler what is assumed to remain constant A heat

In an ideal boiler what is assumed to remain constant?

A) heat energy
B) pressure
C) total energy
D) none of these

A turbine is designed to

A) convert kinetic energy into enthalpy
B) convert enthalpy into internal energy
C) convert enthalpy into work
D) cause a drop in pressure

A defining assumption for any single-stream steady flow device is that

A) the velocity of the fluid flow remains constant
B) the mass flow rate remains constant
C) the net work produced is zero
D) the mass flow rate is zero

Which of the following can be approximated as a steady flow device during normal operation?

A) Turbine B) Compressor C) Throttle D) All of the above

For a throttling device, which of these is a good assumption?

A) h_out= h_in
B) P_in = 0
C) P_out = 0
D) All of the above

After going through the pump, the water’s temperature will ?

A) not decrease
B) decrease  
C) not sure

The flow velocity __ in a nozzle and __ in a diffuser.

A) increases; increases
B) increases; decreases
C) decreases; increases
D) decreases; decreases

Solution

1- b- pressure

2- C) convert enthalpy into work

3- B) the mass flow rate remains constant

4 - C) Throttle

5- A) hout= hin

6- A) not decrease

7- B) increases; decreases