MCQOPTIONS
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MCQOPTIONS
This section includes 31 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The pressure drop in reaction turbines occurs in? |
| A. | fixed blades |
| B. | movable blades |
| C. | both in nozzles & fixed blades |
| D. | in nozzles |
| Answer» D. in nozzles | |
| 2. |
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a |
| A. | convergent-divergent nozzle |
| B. | divergent nozzle |
| C. | convergent nozzle |
| D. | none of the mentioned |
| Answer» C. convergent nozzle | |
| 3. |
The incoming steam inside the turbine goes into? |
| A. | Steam vanes |
| B. | Steam chest |
| C. | Nozzle vanes |
| D. | Moving blades |
| Answer» C. Nozzle vanes | |
| 4. |
The Guide vanes remain stationary in? |
| A. | Curtis staging |
| B. | Rateau staging |
| C. | Both of the mentioned |
| D. | None of the mentioned |
| Answer» B. Rateau staging | |
| 5. |
External loses occur ___________ turbine casing. |
| A. | inside |
| B. | outside |
| C. | both |
| D. | none of the above |
| Answer» C. both | |
| 6. |
Evaporative type of condenser has |
| A. | Water in pipes surrounded by steam outside. |
| B. | Steam and cooling water mixed to give the condensate. |
| C. | Steam in pipes surrounded by water. |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
Governing principle(s) of steam turbine is? |
| A. | Nozzle control governing |
| B. | Throttle governing |
| C. | Bypass governing |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
For straight blades, the minimum blade height is __________of the mean blade ring diameter. |
| A. | 0.2 |
| B. | 0.3 |
| C. | 0.4 |
| D. | 0.5 |
| Answer» B. 0.3 | |
| 9. |
Number of parallel exhausts required for a given steam flow rate of x is? |
| A. | x/63.5 |
| B. | x/36.5 |
| C. | x/68.5 |
| D. | x/56.5 |
| Answer» B. x/36.5 | |
| 10. |
The another name for Velocity compounding is? |
| A. | Rateau Staging |
| B. | Curtis staging |
| C. | Both of the mentioned |
| D. | None of the mentioned |
| Answer» C. Both of the mentioned | |
| 11. |
Single stage impulse turbines are also called as? |
| A. | Laval Turbines |
| B. | Lancashire Turbines |
| C. | Cochran Turbines |
| D. | La Del turbines |
| Answer» B. Lancashire Turbines | |
| 12. |
The loss in efficiency from one stage to another is called? |
| A. | Lost efficiency |
| B. | Carry below efficiency |
| C. | Carry-over efficiency |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 13. |
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 α, where α is the nozzle exit flow angle, if the |
| A. | blades are equiangular |
| B. | blade velocity coefficient is unity |
| C. | blade solidity is 0.65 |
| D. | blades are equiangular and frictionless |
| Answer» E. | |
| 14. |
Due to friction between the fluid & walls of the nozzle, the expansion process is? |
| A. | reversible |
| B. | irreversible |
| C. | reversible adiabatic |
| D. | irreversible adiabatic |
| Answer» E. | |
| 15. |
The pipes carrying steam are made up of? |
| A. | Steel |
| B. | Copper |
| C. | Aluminium |
| D. | Iron |
| Answer» B. Copper | |
| 16. |
The ratio of actual mass flow through the nozzle to the mass flow if the flow were isentropic is? |
| A. | Coefficient of viscosity |
| B. | Coefficient of velocity |
| C. | Coefficient of discharge |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 17. |
In an impulse turbine, steam expands |
| A. | wholly in nozzle |
| B. | partly in the nozzle and partly in blades |
| C. | wholly in blades |
| D. | none of the mentioned |
| Answer» B. partly in the nozzle and partly in blades | |
| 18. |
One row of nozzles followed by one row of blades is called? |
| A. | a group of turbine |
| B. | a step of turbine |
| C. | a process of turbine |
| D. | a stage of turbine |
| Answer» E. | |
| 19. |
The ratio of the work done on the blades to the energy supplied to the blades, is called |
| A. | gross or stage efficiency |
| B. | blading efficiency |
| C. | nozzle efficiency |
| D. | mechanical efficiency |
| Answer» C. nozzle efficiency | |
| 20. |
Rateau staging is another name for? |
| A. | Pressure compounding |
| B. | Velocity compounding |
| C. | Both the above mentioned |
| D. | None of the mentioned |
| Answer» B. Velocity compounding | |
| 21. |
There are basically ______ Ways of compounding steam turbines. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 22. |
THE_INCOMING_STEAM_INSIDE_THE_TURBINE_GOES_INTO??$ |
| A. | Steam vanes |
| B. | Steam chest |
| C. | Nozzle vanes |
| D. | Moving blades |
| Answer» C. Nozzle vanes | |
| 23. |
One_row_of_nozzles_followed_by_one_row_of_blades_is_called?$ |
| A. | a group of turbine |
| B. | a step of turbine |
| C. | a process of turbine |
| D. | a stage of turbine |
| Answer» E. | |
| 24. |
Moving blades are placed next to? |
| A. | Fixed blades |
| B. | Nozzle |
| C. | Nozzle vanes |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 25. |
There are mainly _______ types of turbines? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 26. |
The nozzle formed by curved airfoil sections is called? |
| A. | Curved nozzle |
| B. | Airfoil Nozzle |
| C. | Foil nozzle |
| D. | Reamed nozzle |
| Answer» D. Reamed nozzle | |
| 27. |
Angle of divergence in reamed nozzles is? |
| A. | 10 deg |
| B. | 12 deg |
| C. | 14 deg |
| D. | 16 deg |
| Answer» C. 14 deg | |
| 28. |
Which of the following is used in high pressure impulses stages of steam turbine? |
| A. | Reamed Nozzles |
| B. | Foil Nozzles |
| C. | Both the above mentioned |
| D. | None of the mentioned |
| Answer» B. Foil Nozzles | |
| 29. |
Based on the type of applications, the nozzles are divided into? |
| A. | 3 types |
| B. | 4 types |
| C. | 2 types |
| D. | 5 types |
| Answer» D. 5 types | |
| 30. |
What is another name of converging nozzle? |
| A. | diverging nozzle |
| B. | subsonic nozzle |
| C. | supersonic nozzle |
| D. | none of the mentioned |
| Answer» C. supersonic nozzle | |
| 31. |
Convergent part of the nozzle is usually sharp while the divergent one is? |
| A. | slopy |
| B. | gradual |
| C. | both the above mentioned |
| D. | none of the mentioned |
| Answer» C. both the above mentioned | |