Question

A shell-and-tube-type recuperator the feedwater temperature increases as the extracted steam condenses on the outside of the tubes carrying the feedwater is an opened type feedwater heater 1. a. TRUE/FALSE 2. A vapor power plant that operates with a steam generator at a pressure of 19 MPa is a supercritical vapor power plant a. TRUE/FALSE Lowering the condenser pressures raises the maximum temperature of heat rejection from the Rankine cycle. 3. a. TRUE/FALSE For an ideal Rankine cycle the compression in the pump is isentropic. 4. a. TRUE/FALSE The trap of a regenerative vapor power cycle permits only gases to pass through to a region of lower pressure 5. a. TRUE/FALSE The Otto cycle is isentropic compression of a fixed amount of mass is achieved by a piston, while in the Rankine cycle mass flows isentropically through a pump and turbine 6. a. TRUE/FALSE In a cold air-standard analysis, the specific heats are constant 7. a. TRUE/FALSE Raising boiler pressure raises the average temperature at which energy is added by heat transfer to the Rankine Cycle. 8. a. TRUE/FALSE 9. The ldeal Reversible Air-Standard Otto Cycle is a controlled volume process and the Rankine cycle is a closed volume process a. TRUE/FALSE 10. A standard Rankine cycle that is more efficient than a Carnot cycle is impossible a. TRUE/FALSE

Answer 1

1.True

2.False (because 22 Mpa is supercritical pressure).

3.false

4.True

5.True

6.True

7.True

8.True

9.False

10.True