Power Engineering 4a - Unit 12 - Elements of a boiler system latest update graded A+

Power Engineering 4a - Unit 12 - Elements of a boiler system latest update graded A+ Carbon that is not combined with hydrogen is referred to as: Select one: a. Mono-carbon b. Separated carbon c. Free carbon d. Fixed carbon D As a general rule the size of the condensate receiver should be large enough to hold a volume of condensate equal to the water evaporated by the boiler in a _____ period. Select one: a. One and one half hour b. One hour c. 45 minute d. 20 to 30 minute D Soot blowers are essential equipment on a boiler fired with: Select one: a. Natural gas b. Solid fuels c. Propane d. Butane B The power requirements for the FD fan of a fluidized bed boiler are ______ times _______ than other boiler designs? Select one: a. 4, more b. 1.5, less c. 3, more d. 1.5, more C Inlet damper control on a fan: Select one: a. Is far less complicated than outlet damper control. b. Is only used on forced draft fans. c. Requires less power to drive the fan at reduced loads. d. Requires more power to drive the fan when the vanes are closed. C Heating plants with multiple boilers may have: Select one: a. A common feedwater control valve b. Separate condensate receivers c. Individual feedwater systems d. Independent boiler feedwater controls D The _______ fan blows combustion air into the wind box of a boiler. Select one: a. Balanced draft b. Forced draft c. Induced draft d. High pressure B Combustion of fuel in a boiler furnace: Select one: a. Requires a higher air-fuel ratio than a diesel engine b. Should occur with a minimum of excess air c. Is perfect when the stack gases are free of moisture d. Requires mechanical draft B A modulating pressure atomizer has its return oil flow regulated by: Select one: a. A pressure regulator b. A solenoid valve in the return line c. A firing rate control valve in the return line d. A modulating valve to the burner C The advantage of a steel stack over a reinforced concrete stack is that a steel stack: Select one: a. Has longer life b. Has lower cost