MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Thermal Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following statements about reaction turbines is TRUE? |
| A. | Steam pressure drops suddenly |
| B. | The complete expansion of the steam takes place inside nozzle |
| C. | Steam pressure is not altered as the steam moves over the blades the turbine |
| D. | Steam pressure gradually drops as the steam moves over the blades of the turbine |
| Answer» E. | |
| 2. |
In Simple impulse turbine the pressure of the steam falls gradually. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Which of the following statements about steam turbines is FALSE? |
| A. | Thermal efficiency of steam turbine is higher than that of steam engine |
| B. | Internal lubrication is not required |
| C. | Flywheel installation is not necessary |
| D. | It has a non-uniform rate of power generation |
| Answer» E. | |
| 4. |
Stationary turbines with variable speed cannot be used to drive _____ |
| A. | turbo-blowers |
| B. | air-circulators |
| C. | pumps |
| D. | ships |
| Answer» E. | |
| 5. |
Which of the following turbines have inlet pressure of steam greater than 225 ata? |
| A. | Medium pressure turbines |
| B. | High pressure turbines |
| C. | Low pressure turbines |
| D. | Supercritical turbines |
| Answer» E. | |
| 6. |
Which of the following statements regarding topping turbines is TRUE? |
| A. | Exhaust steam is utilized in low and medium condensing turbines |
| B. | Always operate at low initial conditions (steam pressure and temperature) |
| C. | It has highest efficiency among all the turbines |
| D. | Exhaust steam is lost completely |
| E. | It has highest efficiency among all the turbinesd) Exhaust steam is lost completely |
| Answer» B. Always operate at low initial conditions (steam pressure and temperature) | |
| 7. |
Which of the following statement regarding condensing turbines with generators is TRUE? |
| A. | Exhaust steam is supplied to intermediate stages |
| B. | Steam is not extracted from intermediate stages |
| C. | The latent heat of exhaust steam during condensation is utilized in feed water heating |
| D. | Steam at a pressure less than atmospheric is directed to a condenser |
| Answer» E. | |
| 8. |
Which of the following is NOT a valid type of steam turbines, based on heat drop process? |
| A. | Condensing turbines with generator |
| B. | Back pressure turbines |
| C. | Topping turbines |
| D. | Supercritical turbines |
| Answer» E. | |
| 9. |
On the basis of method of governing, steam turbines are classified into turbines with _____ |
| A. | diffuser governing and nozzle governing |
| B. | throttle governing and nozzle governing |
| C. | impulse governing and reaction governing |
| D. | throttle governing and diffuser governing |
| Answer» C. impulse governing and reaction governing | |
| 10. |
Turbines with separate rotor shafts for each cylinder placed parallel to each other are known as _____ |
| A. | multi-rotor turbines |
| B. | multiaxial turbines |
| C. | single-cylinder turbines |
| D. | multi-utility turbine |
| Answer» C. single-cylinder turbines | |
| 11. |
According to the direction of steam flow, steam turbines are classified into _____ |
| A. | axial and radial |
| B. | uniaxial and multi-axial |
| C. | upstream and downstream |
| D. | forward and backward |
| Answer» B. uniaxial and multi-axial | |
| 12. |
According to the number of pressure stages, steam turbines are classified into _____ |
| A. | single cylinder and multi-cylinder |
| B. | single stage and multi-stage |
| C. | mono stage and multi-stage |
| D. | axial and radial |
| Answer» C. mono stage and multi-stage | |
| 13. |
Steam turbine produces useful work in the form of rotation of turbine shaft, by extracting thermal energy from pressurized steam. |
| A. | True |
| B. | False |
| Answer» B. False | |