Mechanical Engineering : Steam Boilers QUESTIONS AND ANSWERS :: part7 : 21 to 25
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
21.Which is not correct statement about effect of sulfur in fuel |
| it has heating value |
| it helps in electrostatic precipitation of ash in flue-gases |
| it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low |
| it erodes furnace walls |
| none of the above. |
22.Caking coals are those which |
| form lumps or masses of coke |
| burn freely |
| show little or no fusing action |
| burn completely |
| do not form ash. |
23.The capacity of induced draft fan compared to forced draft fan in a boiler is |
| same |
| more |
| less |
| less or more depending on size of boiler |
| unpredictable. |
24.The proximate analysis of fuel lists |
| various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume |
| various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight |
| fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash |
| fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash |
| moisture and ash free heating value. |
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