Chapter 1 Exam Flashcards
A low pressure boiler operates at a pressure of not more than _____psi
15
35
50
75
15 psi
The higher the steam pressure the higher the_______of the water in the boiler
Impurities
Boiling point
Volume
Atmospheric pressure
Boiling point
_________is the amount of energy equal to the evaporation of 34.5 lb of water/hr from and at a feedwater temperature of 212F
Factor of evaporation
Boiler horsepower
Latent heat of fusion
Evaporation energy
Boiler horsepower
When a steam boiler is operating at 100 pounds per square inch gauge pressure the temperature of the water and steam will be approximately _____F
115
225
338
550
338
A HRT boiler is a ____ boiler
Watertube
Firetube
Scotch marine
Condensing
Firetube
As steam pressure in a boiler increases there is a corresponding increase in the ______
Superheat
Volume of steam
Boiler horsepower
Temperature
Temperature
In a firetube boiler the heat produced by gases of combustion_____
Passes through her tubes
Surround the tubes
Bypass the combustion chamber
Passes through the tubes
Water tubes boiler were designed to operate at a pressure as high as_____psi, a point known as the critical pressure of steam
512
1015
3206
5000
3206 Psi
A mud drum, if used, is the lowest part of the water side of a______boiler
HRT
Watertube
Firetube
Electric
Watertube
A_______boiler is watertube boiler in which replaceable serpentine tubes are connected to the upper and lower drums and surround the firebox
Straight tube
Bent tube
Membrane
Flex tube
Flex-tube
In electrode electric boilers, heat is generated by electric current flowing from one electrode to another electrode through the______
Metal plates
Stainless steel tubes
Coiled conductor
Boiler water
Boiler eater
A condensing economizer recovers______btu/lb from the heat in water vapor
32
212
970
1150
1150
A_______does not require a burner because it uses hot waste heat gases from another process
Water boiler
Electric boiler
Heat recovery steam generator
Scotch marine boiler
Heat recovery steam generator
In a watertube boiler, the heated ester inside the tubes become_____ causing it to rise
Less dense
More dense
Less viscous
More viscous
Less dense
Cogeneration produces______and then uses the waste heat in a process or for heating
Hot air
Hot water
Electricity
Gas
Electricity
A______is a device that converts mechanical energy into electricity energy by means of electromagnetic induction
Generator
Transfer switch
Transformer
Turbine
Generator
A_____uses municipal solid waste that would normally go to la landfills
Electric boiler
Coal boiler
Refuse boiler
Heat recovery steam generator
Refuse boiler
_________efficiency is the ratio of the heat absorbed by a boiler output to the heat available in the fuel input
Combustion
Watertube
Thermal
Overall plant
Thermal
Baffles are used to direct gases so that they come in close contact with the______
Feedwater
Combustion chamber
Superheater
Boiler heating surface
Boiler heating surface
_________stress occur when two forces of equal intensity act parallel to each other but in opposite directions
Compressive
Sheer
Tensile
Cutting
Shear
Some watertube boiler are equipped with______to increase the heating surface and the life of the furnace refractory
Brickwork
Baffles
Waterwalls
Stays
Waterwalls
