MCQOPTIONS
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MCQOPTIONS
This section includes 18 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 actual power supplied by the engine crankshaft is called? |
| A. | indicated power |
| B. | frictional power |
| C. | brake power |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 2. |
In a water-tube boiler, water flows through? |
| A. | drum |
| B. | shell |
| C. | tube |
| D. | none of the mentioned |
| Answer» B. shell | |
| 3. |
Cut-off ratio is the ratio of? |
| A. | cut-off volume to clearance volume |
| B. | clearance volume to cut-off volume |
| C. | volume at cut-off to swept volume |
| D. | swept volume to volume at cut-off |
| Answer» D. swept volume to volume at cut-off | |
| 4. |
The diagram factor is the ratio of? |
| A. | area of actual indicator diagram to the area of theoretical indicator diagram |
| B. | actual work done per stroke to the theoretical work done per stroke |
| C. | actual mean effective pressure to the theoretical mean effective pressure |
| D. | any of the above mentioned |
| Answer» E. | |
| 5. |
A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called |
| A. | Tandem type compound engine |
| B. | Woolf type compound engine |
| C. | Receiver type compound engine |
| D. | None of the mentioned |
| Answer» B. Woolf type compound engine | |
| 6. |
What is the pressure range between which a marine steam generator works? |
| A. | 100-200 bar |
| B. | 60-65 bar |
| C. | 80-100 bar |
| D. | 70-85 bar |
| Answer» C. 80-100 bar | |
| 7. |
Locomotive boiler is a |
| A. | single tube, vertical, externally fired & stationary boiler |
| B. | single tube, horizontal, internally fired& stationary boiler |
| C. | multitubular, horizontal, externally fired & stationary boiler |
| D. | multitubular, horizontal, internally fired & mobile boiler |
| Answer» E. | |
| 8. |
Benson boiler requires |
| A. | 2 drums |
| B. | 3 drums |
| C. | 0 drums |
| D. | 1 drum |
| Answer» D. 1 drum | |
| 9. |
The cylinder condensation or missing quantity may be reduced by |
| A. | keeping the expansion ratio small in each cylinder |
| B. | superheating the steam supplied to the engine cylinder |
| C. | the efficient steam jacketing of the cylinder walls |
| D. | all of the mentioned |
| Answer» E. | |
| 10. |
Besides mean effective pressure, the data required to determine the indicated power of an engine include |
| A. | piston diameter, length of stroke and calorific value of fuel |
| B. | piston diameter, specific fuel consumption and Calorific value of fuel |
| C. | piston diameter, length of stroke and speed of rotation |
| D. | specific fuel consumption, speed of rotation and torque |
| Answer» D. specific fuel consumption, speed of rotation and torque | |
| 11. |
The shell diameter of a Locomotive boiler is? |
| A. | 1.5m |
| B. | 1m |
| C. | 2m |
| D. | 2.5m |
| Answer» B. 1m | |
| 12. |
Comparing fire tube and water tube boilers, which boiler can produce comparatively higher pressure steam than another for the same capacity? |
| A. | fire tube boiler |
| B. | water tube boiler |
| C. | both can produce steam at same pressure for the same capacity |
| D. | none of the mentioned |
| Answer» C. both can produce steam at same pressure for the same capacity | |
| 13. |
Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because |
| A. | there are chances of explosion during preheating |
| B. | it reduces its calorific value tremendously |
| C. | the hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot |
| D. | it reduces its flame temperature tremendously |
| Answer» D. it reduces its flame temperature tremendously | |
| 14. |
What is the purpose of using economizer in the boiler? |
| A. | to heat feed water by utilizing heat from exhaust gases |
| B. | to heat feed water by utilizing some heat from superheated steam |
| C. | to superheat steam |
| D. | none of the mentioned |
| Answer» B. to heat feed water by utilizing some heat from superheated steam | |
| 15. |
The equivalent evaporation is defined as? |
| A. | the ratio of heat actually used in producing the steam to the heat liberated in the furnace |
| B. | the amount of water evaporated or steam produced in kg of fuel burnt |
| C. | the amount of water evaporated from and at 100 degree C into dry & saturated steam |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 16. |
The theoretical indicator diagram of a simple steam engine is based upon the assumption that |
| A. | there is no pressure drop due to condensation |
| B. | steam is admitted at boiler pressure & exhausted at condenser pressure |
| C. | the expansion of the steam is hyperbolic |
| D. | all of the mentioned |
| Answer» E. | |
| 17. |
In a fire-tube boiler, the water is in? |
| A. | tube |
| B. | shell |
| C. | drum |
| D. | all of the mentioned |
| Answer» C. drum | |
| 18. |
The diameter of flue tube in a Cornish boiler is __________ that of the shell |
| A. | 3/5 |
| B. | 2/5 |
| C. | 1/3 |
| D. | 1/4 |
| Answer» B. 2/5 | |