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Home⇒ Engineering⇒
Furnace technology
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ Advantages of use of preheated combustion air are all (a), (b) and (c). [other wrong options] [Discuss in forum] saving in fuel consumption. reduction in scale losses. increase in flame temperature. |
Q42 ⇒ Which furnace employs an I.D. fan for the removal of flue gases from the furnace ? High pressure boiler. [other wrong options] [Discuss in forum] Coke oven. Blast furnace stoves. Beehive coke oven. |
Q43 ⇒ In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of imperfect mixing of fuel & air and infiltration of air. [other wrong options] [Discuss in forum] use of non-preheated combustion air. use of pulverised solid fuels. use of excessive positive draft in the furnace. |
Q44 ⇒ The resistance furnace produces heat by the flow of current through a heating element. [other wrong options] [Discuss in forum] electric arc struck between electrodes and the charge. combination of induced current and skin effect. none of these |
Q45 ⇒ Main gas valve in a gaseous fuel burner is a __________ valve. gate [other wrong options] [Discuss in forum] butterfly globe none of these |
Q46 ⇒ Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent. < 2 [other wrong options] [Discuss in forum] < 5 < 8 < 10 |
Q47 ⇒ Which of the following is a heat treatment furnace ? Annealing furnace [other wrong options] [Discuss in forum] Muffle furnace Reheating furnace Rotary kiln |
Q48 ⇒ The heat recoverable from flue gases of furnaces depends on the all (a), (b) and (c). [other wrong options] [Discuss in forum] thermal efficiency of furnace. quantity of flue gases. flue gas temperature drop through the furnace. |
Q49 ⇒ Tunnel kilns are usually used for drying/tempering of refractories. [other wrong options] [Discuss in forum] roasting of pyrites. reheating of slabs. melting of glass. |
Q50 ⇒ Which of the following is a natural draft furnace ? Blast furnace stoves [other wrong options] [Discuss in forum] Power plant boilers Sintering furnace None of these |
Q51 ⇒ Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent. 80 [other wrong options] [Discuss in forum] 20 40 60 |
Q52 ⇒ Which is not a hearth furnace ? Cupola [other wrong options] [Discuss in forum] Glass tank furnace Open hearth furnace Reheating furnace |
Q53 ⇒ Turndown ratio of a burner gives an idea of the __________ in the furnace. range of fuel firing rates [other wrong options] [Discuss in forum] volume of the combustion chamber maximum heat input rate only minimum heat input rate only |
Q54 ⇒ Cement Kiln is a rotary Kiln [other wrong options] [Discuss in forum] tunnel Kiln natural draft furnace batch furnace |
Q55 ⇒ Which of the following is a batch furnace ? Cupola [other wrong options] [Discuss in forum] Reheating furnace Glass tank furnace None of these |
Q56 ⇒ Ceramic recuperators compared to metallic recuperators for the same duty occupy more space. [other wrong options] [Discuss in forum] are lighter. are less costly. have higher pressure differential between flue gas & air side. |
Q57 ⇒ Dampers are located before the I.D fan [other wrong options] [Discuss in forum] after the I.D. fan near the top of the chimney anywhere after the I.D. fan |
Q58 ⇒ Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent. 40 [other wrong options] [Discuss in forum] 20 65 80 |
Q59 ⇒ Which of the following is a periodic furnace? Soaking pit [other wrong options] [Discuss in forum] Tunnel kiln Rotary kiln Reheating furnace. |
Q60 ⇒ An example of a periodic furnace is the blast furnace stoves [other wrong options] [Discuss in forum] blast furnace coke oven heating chamber rotary kilns |
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