Mechanical Engineering : Steam Boilers QUESTIONS AND ANSWERS :: part7 : 11 to 15
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
11.Green coal, in order to be burnt, must be |
| heated sufficiently |
| burnt in excess air |
| heated to its ignition point |
| burnt as powder |
| burnt as lumps. |
12.Incomplete combustion can be best judged by |
| smoky chimney exit |
| excess air in flue gases |
| measuring carbon mono-oxide in flue gases |
| measuring temperature of flue gases at exit of furnace |
| measuring oxygen in flue gases. |
13.Presence of moisture in fuel oil would |
| keep the burner tips cool |
| aid in proper combustion |
| cause sputtering, possibly extinguish�ing flame |
| clean the nozzles |
| reduce flame length. |
14.The three "Ts" for good combustion are |
| temperature, time, and turbulence |
| total air, true fuel, and turbulence |
| thorough mixing, total air, and temperature |
| total air, time, and temperature |
| none of the above. |
15.Which is not correct statement about pulverized fuel firing |
| high burning rate is possible |
| heat release can be easily controlled |
| fuel burns economically |
| it is the best technique for burning high ash content fuel having low fusion ash |
| separate mills are required to powder the coal. |
More Steam Boilers QUESTIONS AND ANSWERS available in next pages
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