101. Advantages of use of preheated combustion air are
102. Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the
103. The heating capacity of continuous reheating furnace depends upon the
104. Fuel economy in an industrial furnace operation can not be achieved by the use of
105. The function of an economiser in a boiler is to preheat the
106. Which furnace employs an I.D. fan for the removal of flue gases from the furnace ?
107. Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.
108. The advantages of firing pulverised coal in the furnace lies in the fact that, it
109. Artificial draught produced by a fan in the furnace can be controlled by the
110. Regenerators as compared to recuperators for the same duty
111. Circulation of gases in furnace is caused by the
112. Furnace aerodynamics is related to the __________ in the furnace.
113. If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.
114. Which is not accomplished in an underfired furnace ?
115. In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of
116. Rate of heat release in a furnace, which is the measure of heat intensity is defined as
117. Oxygen enrichment of combustion air does not result in increase of the
118. An example of recuperative furnace is the
119. Which one is not an induced draught furnace?
120. Overfire burning in a furnace is a phenomenon characterised by
121. If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.
122. Neutral atmosphere is maintained in a/an __________ furnace.
123. The resistance furnace produces heat by the
124. Which of the following variables does not affect the furnace capacity ?