Steam Turbine Quiz

25 Questions Quiz

Time Left: 300 seconds

1. Steam turbines are classified based on _______.

A. Steam flow direction
B. Blade design
C. Exhaust condition
D. All of the above

2. An impulse turbine converts energy mainly by _______.

A. Pressure drop in moving blades
B. Pressure drop in nozzles
C. Pressure drop in rotor
D. Pressure rise in casing

3. The moving blades of a reaction turbine act as _______.

Nozzles
Reservoirs
Bearings
Diffusers

4. Pelton turbine operates best under _______.

Low head, high discharge
High head, low discharge
Medium head
Zero head

5. In an impulse turbine, steam expands in the _______.

Moving blades
Casing
Nozzle
Shaft

6. Francis turbine is a _______ flow turbine.

Axial
Mixed
Radial
Tangential

7. Draft tube helps to _______.

Increase velocity at exit
Recover pressure energy
Reduce temperature
Control discharge

8. Kaplan turbine has _______ blades.

Fixed
Curved
Adjustable
Hollow

9. Cavitation occurs due to _______.

High pressure
Low pressure
High temperature
Poor lubrication

10. Specific speed of Kaplan turbine is _______.

Very low
Medium
High
Zero

11. In an impulse turbine, the _______ velocity changes.

12. Reaction turbine uses both pressure and _______ energy.

13. The pipe supplying water to a turbine is called _______.

14. Pelton turbine uses _______ to extract energy.

15. Runner is mounted on the _______.

16. Kaplan turbine works under _______ head.

17. The speed of turbine is controlled by _______.

18. Reaction turbine blades are fully immersed in _______.

19. Draft tube is placed at the _______ of turbine.

20. Steam at nozzle exit has _______ pressure.

21. Steam expands in the _______.

22. Hydraulic turbines convert _______ energy of water.

23. Pelton turbine maximum efficiency occurs at _______ of jet speed.

24. Reaction turbine requires a _______ casing.

25. Formation and collapse of vapor bubbles is called _______.