POWER ENGINEERING 3B1 CHAPTER 4 QUESTIONS AND ANSWERS WITH SOLUTIONS 2024/25

What is the main purpose of baffles in the setting of a boiler? a. To supply strength to the setting b. To allow hot gases to make more than one pass through a boiler c. To produce eddy currents d. To cause a restriction of gas flow e. to mix the fuel gas and the combustion air for complete combustion - ANSWER b Which of the following are disadvantages of using baffles in a boiler setting? 1. Eddy currents can be produced 2. Increased friction can result 3. Coal fired boilers can result in pockets of ash accumulation 4. Heat transfer is increased a. 1,2,3,4 b. 1,2,3 c. 2,3,4 d. 2,4 e. 1,3,4 - ANSWER b In order to direct the flow of combustion gas over the tubes in a watertube boiler, it is necessary to use _______. a. baffles b. deflectors c. fans d. preheaters - ANSWER a Baffles can be placed so as to cause the gases to flow at right angles to the tube length, in which case they are called ________ baffles. a. longitudinal b. cross