Main propulsion Boiler Operation | 125 Questions and Answers(A+ Solution guide)

The number of pounds of steam generated per hour at the pressure and temperature required for all purposes to develop contract shaft horsepower of the ship divided by the numbers of boilers installed is defined as? - Boiler full power capacity Boiler overload capacity is normally what percentage of boiler full power capacity? - 120% A pressure specified by the boiler manufacturer as a criterion for the boiler design is termed as? - Design pressure What is the minimum steam drum pressure on an operating boiler? - 85% of boiler operating pressure What is the minimum steam drum pressure on an operating boiler? - 85% of boiler operating pressure What type of circulation would installing the generating tubes at an increased inclination be? - Accelerated natural What type of boiler consists of one or more water drums? - Drum type Do header type boilers have a water drum? - No. The term high pressure boiler refers to a boiler operating at what pressure? - 751 psi or above What two sheets of steel make up the construction of the steam drum? - Wrapper sheet and tube sheet. What purpose do the generating tubes serve? - Provide the area in which most of the saturated steam is generated.What is the function of the waterwall tubes? - To protect furnace refactories, and allow a higher heat release.