MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Corrosion is the decay or disintegration of boiler body material either due to chemical or electrochemical reaction with environment. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Foaming is caused by the formation of ___________ |
| A. | Acids |
| B. | Alcohols |
| C. | Oils and alkalis |
| D. | Ketones |
| Answer» D. Ketones | |
| 3. |
The phenomenon during which the boiler material becomes brittle due to accumulation of caustic substances is known as ___________ |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» E. | |
| 4. |
The propulsion of water into steam drum by extremely rapid, almost explosive boiling of water at the heating surface is called ___________ |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» C. Corrosion | |
| 5. |
Which of the following is not a result of the excess of impurity in boiler-feed? |
| A. | Scale and sludge formation |
| B. | Decomposition |
| C. | Corrosion, priming and foaming |
| D. | Caustic embrittlement |
| Answer» C. Corrosion, priming and foaming | |
| 6. |
Water is mainly used in boilers for the generation of ________________ |
| A. | Power |
| B. | Electricity |
| C. | Steam |
| D. | Current |
| Answer» D. Current | |
| 7. |
FOAMING_IS_CAUSED_BY_THE_FORMATION_OF?$ |
| A. | Acids |
| B. | Alcohols |
| C. | Oils and alkalis |
| D. | Ketones |
| Answer» D. Ketones | |
| 8. |
Corrosion_is_the_decay_or_disintegration_of_boiler_body_material_either_due_to_chemical_or_electrochemical_reaction_with_environment.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
The phenomenon during which the boiler material becomes brittle due to accumulation of caustic substances is known a? |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» E. | |
| 10. |
The propulsion of water into steam drum by extremely rapid, almost explosive boiling of water at the heating surface is called |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» C. Corrosion | |
| 11. |
The scales decrease the efficiency of boiler and chances of explosions are also there. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Which of the following option is incorrect about the sludges? |
| A. | Sludges are soft, loose and slimy precipitate |
| B. | They are non-adherent deposits and can be easily removed |
| C. | Formed generally at heated portions of the boiler |
| D. | Can be removed by blow down operation |
| Answer» D. Can be removed by blow down operation | |
| 13. |
If the precipitate formed is soft, loose and slimy, these are __________ and if the precipitate is hard and adhering on the inner wall, it is called _____________ |
| A. | Sludges, scale |
| B. | Scale, sludges |
| C. | Sludges, rodent |
| D. | Scale, rodent |
| Answer» B. Scale, sludges | |
| 14. |
Which of the following is not a result of excess of impurity in boiler-feed? |
| A. | Scale and sludge formation |
| B. | Decomposition |
| C. | Corrosion, priming and foaming |
| D. | Caustic embrittlement |
| Answer» C. Corrosion, priming and foaming | |
| 15. |
Which of the following should not be a composition of boiler-feed water? |
| A. | Hardness should be below 0.2ppm |
| B. | Its caustic alkalinity should lie between 0.15 to 0.45 ppm |
| C. | Its soda alkalinity should be 0.45-1 ppm |
| D. | Its caustic alkalinity should be 1.5-2 ppm |
| Answer» E. | |
| 16. |
Water is mainly used in boilers for the generation of |
| A. | Power |
| B. | Electricity |
| C. | Steam |
| D. | Current |
| Answer» D. Current | |