Physics Test Preparations On Steam nozzles and turbines Part 1

Test Preparation on Physics Test Preparations On Steam nozzles and turbines Part 1

1.

A nozzle is said to be a convergent nozzle

1when the cross-section of the nozzle increases continuously from entrance to exit
2when the cross-section of the nozzle decreases continuously from entrance to exit
3when the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
4none of the above

2.

A turbine is said to have an axial discharge when the steam leaves the blade tip at __________ to the direction of the blade motion.

160Adeg
2180Adeg
390Adeg
4270Adeg

3.

The flow through a nozzle is regarded as

1constant volume flow
2constant pressure flow
3isothermal flow
4isentropic flow

4.

The ratio of total useful heat drop to the total isentropic heat drop is called

1stage efficiency
2internal efficiency
3Rankine efficiency
4none of these

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