Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing? Ash disposal problem Higher power consumption in its transportation Erosion of induced draft fan blades Excessive fly ash discharge from the stack TRUE ANSWER : ? YOUR ANSWER : ?
Circulation of gases in furnace is caused by the Furnace pressure in conjunction with draft in flues All of these Difference in density between hot and cold gases Change in volume during a change of temperature TRUE ANSWER : ? YOUR ANSWER : ?
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C. 130 80 180 250 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a batch furnace? Cupola Reheating furnace Glass tank furnace None of these TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a natural draft furnace? None of these Power plant boilers Sintering furnace Blast furnace stoves TRUE ANSWER : ? YOUR ANSWER : ?
Cement Kiln is a Batch furnace Tunnel Kiln Rotary Kiln Natural draft furnace TRUE ANSWER : ? YOUR ANSWER : ?
The rate of scaling of furnace stock depends upon the Time Temperature All of these Nature of atmosphere TRUE ANSWER : ? YOUR ANSWER : ?
The resistance furnace produces heat by the None of these Flow of current through a heating element Electric arc struck between electrodes and the charge Combination of induced current and skin effect TRUE ANSWER : ? YOUR ANSWER : ?
Very high pressure boilers are usually __________ boilers. Waste heat Fire tube Water tube Natural circulation TRUE ANSWER : ? YOUR ANSWER : ?
Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures. 1050 750 1250 350 TRUE ANSWER : ? YOUR ANSWER : ?