Boiler Operator State Test Correct 100% 2023

A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up to -ANSWER 15 psi The evaporation of 34.5 lb of water/hr from and at a feedwater temperature of 212 degrees F is defined as -ANSWER one boiler horsepower In a firetube boiler, the heat and gases of combustion pass -ANSWER through the tubes A firetube boiler may be used -ANSWER in high or low pressure plants Because of the large volume of water, the boiler most likely to cause a boiler explosion is -ANSWER a firetube boiler A horizontal return tubular (HRT) boiler is _____________ boiler -ANSWER a firetube As steam pressure in a boiler increases, there is a corresponding increase in the -ANSWER temperature A sudden drop in boiler steam pressure without a corresponding drop in boiler water temperature could result in -ANSWER a boiler explosion The part of a boiler that has the heat and gases of combustion on one side & water on the other side is known as the -ANSWER heating surface The comparison, or ratio, of heat supplied in fuel to heat absorbed by water is defined as ___________ efficiency -ANSWER thermal Baffles are designed to direct the gases of combustion so that they come into close contact with the -ANSWER boiler heating surface The steam and water drum of watertube boilers is dished (concave) to eliminate the need for -ANSWER stays To increase the life of a furnace refractory, some watertube boilers are equipped with -ANSWER waterwalls Vertical firetube boilers require -ANSWER high ceilings, less floor space, & the use of staybolts In a watertube boiler, the heat and gases of combustion pass -ANSWER around the tubes The __________ boiler has a large volume of water in relation to horsepower size -ANSWER firetube Stays and braces are needed to prevent bulging in -ANSWER a firetube boiler (high or low pressure) The ____________ boiler was developed to provide steam at higher pressures -ANSWER watertube Boiler plates and staybolts are subjected to ____________ stress -ANSWER tensile Safety valve connections must be approved by the -ANSWER American Society of Mechanical Engineers (ASME) Boiler fittings are necessary for -ANSWER safety & efficiency The most important fitting on a Boiler Operator State Test Correct 100% 2023