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STEAM BOILERS (CHAPTER 1) EXAM WITH QUESTIONS AND ANSWERS #19
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STEAM BOILERS (CHAPTER 1) EXAM WITH QUESTIONS ANDANSWERS #19
_______is the amount of energy equal to the evaporation of 34.5 lb of water/hour from
and at feed water temperature of 212°F - correct answer boiler hp
When a steam boiler is operating at 100 pounds per square inch gauge pressure (psig),
the temperature of the water and steam will be approximately______°F - correct answer
338°F
A low pressure steam boiler has an MAWP of ______. Psi - correct answer 15 psi
The higher the steam pressure, the higher the_______of the water in the boiler - correct
answer boiling point
A horizontal return tubular (HRT) boiler is a_______boiler - correct answer firetube
As steam pressure in a boiler increases, there is a corresponding increase in the______
- correct answer temperature
A sudden drop in pressure from 100 PSIG to 0 PSIG without a corresponding drop in
temperature could result in a(n) - correct answer explosion
Water will boil and turn to steam when it reaches_______°F at atmospheric pressure at
sea level - correct answer 212
________ efficiency is the ratio of heat absorbed by the boiler (output) to the heat
available in the fuel (input) - correct answer thermal
Baffles are used to direct gases so that they come in close contact with the________ -
correct answer boiler heating surface
_______stress is stress that occurs when two forces of equal intensity act parallel to
each other but in opposite directions - correct answer shear
Some water boilers are equipped with________to increase the heating surface in the
life of the Furnace refractory - correct answer waterwalls
A disadvantage of a vertical fire tube boiler is that it requires_________ - correct answer
a high ceiling
In a fire tube boiler, the heat produced by gases of combustion_________ - correct
answer passes through the tubes
Water tube boilers were designed to operate at pressures as high as_________psi, a
point known as the critical pressure of steam - correct answer 3206 psi
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