ESSURE 2. 3. 1. The steam drum of watertube boilers is dished (concave) to eliminate the need for 1 A. brickwork B. waterwalls C. stays D. baffles Chapter 1 Review STEAM BOILERS Section 1.2- Boiler Construction stress occurs when two forces of equal intensity act from opposite directions and push toward the center of an object. A. Compressive B. Tensile C. Shear D. Sinuous with the boiler heating surface. A. Tube sheets B. Headers C. Stays D. Baffles are used to direct the gases of combu Date B. fire tube C. waterwall D. baffle 4. A is a set of tubes that is placed in th used to increase the heating surface of bo A. water tube A draft fans, and fuel train. A. waterwall B. tubeless C. package D. field-erected boiler comes completely assemble n so that they come in close contact nace area of watertube boilers and and the service life of refractory. th its own pressure vessel, burner