MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 design of steam generator greatly depends on |
| A. | spontaneous combustion |
| B. | sulphur content |
| C. | ash softening temperature |
| D. | heating value |
| Answer» D. heating value | |
| 2. |
Dry air required to burn 1kg of carbon completely may be around ________________ kg. |
| A. | 11 |
| B. | 38 |
| C. | 2 |
| D. | 20 |
| Answer» B. 38 | |
| 3. |
Presence of ______________ in dry gaseous fuel does not contribute its calorific value. |
| A. | hydrogen |
| B. | sulphur |
| C. | oxygen |
| D. | carbon |
| Answer» D. carbon | |
| 4. |
The heat transferred when the H2O in the products is in the vapour state is called? |
| A. | HCV |
| B. | LCV |
| C. | HHV |
| D. | None of the mentioned |
| Answer» C. HHV | |
| 5. |
Which of these is not a type of drive of variable speed control? |
| A. | variable speed turbine |
| B. | hydraulic coupling |
| C. | multiple speed ac motor |
| D. | electronically adjustable turbine drive |
| Answer» E. | |
| 6. |
If the enthalpy change for a reaction is zero, ΔG° is equal to |
| A. | TΔS° |
| B. | -TΔS° |
| C. | -ΔH° |
| D. | lnKeq |
| Answer» C. -ΔH° | |
| 7. |
For exothermic reactions, free energy change is? |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | none of the mentioned |
| Answer» C. zero | |
| 8. |
The heat transferred when the H2O in the products is in the liquid state is called? |
| A. | HCV |
| B. | LCV |
| C. | LHV |
| D. | None of the mentioned |
| Answer» B. LCV | |
| 9. |
Grindability of coal is 100. It implies that |
| A. | it can't be pulverised |
| B. | it is easily pulverised |
| C. | can be pulverised with difficulty |
| D. | power consumption is high in pulverisation |
| Answer» C. can be pulverised with difficulty | |
| 10. |
The internal energy of products minus the internal energy of reactants for complete combustion at specific temperature & pressure gives the internal energy of? |
| A. | combustion |
| B. | partial combustion |
| C. | complete combustion |
| D. | none of the mentioned |
| Answer» B. partial combustion | |
| 11. |
'Fat coal' means a coal having |
| A. | high volatile matter |
| B. | low ash content |
| C. | low calorific value |
| D. | non-smoking tendency |
| Answer» B. low ash content | |
| 12. |
HCV stands for? |
| A. | Higher Combustion Value |
| B. | Higher Convection Value |
| C. | Higher Calorific Value |
| D. | Higher Calorific Value |
| Answer» E. | |
| 13. |
The free energy of chemical elements at 1 atm & 25HoC is assumed to be? |
| A. | Negative |
| B. | Positive |
| C. | Zero |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
The difference in total carbon and fixed carbon of coal will be minimum in case of |
| A. | lignite |
| B. | bituminous coal |
| C. | high temperature coke |
| D. | anthracite |
| Answer» D. anthracite | |
| 15. |
The overall efficiency of a power plant is given by |
| A. | 3600/NTO |
| B. | 3600/AP |
| C. | 3600/HHV |
| D. | 3600/NPHR |
| Answer» E. | |