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high pressure boilers final exam with answers
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high pressure boilers final exam with answers
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high pressure boilers final exam with answersa low pressure steam boiler operates at a pressure of not more than _____ psi - ** VERIFIED
ANSWERS **✔✔15
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 - ** VERIFIED ANSWERS
**✔✔338
a horizontal return tubular (HRT) boiler is a _____ boiler - ** VERIFIED ANSWERS **✔✔firetube
a sudden drop in pressure from 100 psig to 0 psig without a corresponding drop in temperature could
result in an ______ - ** VERIFIED ANSWERS **✔✔explosion
______ efficiency is the ratio of the heat absorbed by a boiler (output) to the heat available in the fuel
(input) - ** VERIFIED ANSWERS **✔✔thermal
baffles are used to direct gases so that they come in close contact with the _____ - ** VERIFIED
ANSWERS **✔✔boiler heating surface
a mud drum, if used, is the lowest part of the water side of a(n) _____ boiler. - ** VERIFIED
ANSWERS **✔✔watertube
according to ASME Code, a high pressure steam boiler operates at a steam pressure higher than
_____ psi - ** VERIFIED ANSWERS **✔✔15
in a watertube boiler, the heated water inside the tubes becomes ______, causing it to rise - **
VERIFIED ANSWERS **✔✔less dense
a _____ is a device that converts mechanical energy into electrical energy by means of
electromagnetic induction - ** VERIFIED ANSWERS **✔✔generator
, if a boiler is generating 20,000 lb/hr of steam, it must be supplied with _____ lb/hr of feedwater - **
VERIFIED ANSWERS **✔✔20,000
from the deaerator, oxygen and other noncondensable gases are separated form the feedwater and
directed to the atmosphere _____ - ** VERIFIED ANSWERS **✔✔through the vent
one pound of water is needed to produce ______ of steam - ** VERIFIED ANSWERS **✔✔1 lb
_____ are used for loads that require dry steam, such as turbines - ** VERIFIED ANSWERS
**✔✔superheaters
in a feedwater system, the _____ valve is located closest to the shell of the boiler on the feedwater
line so that the check valve can be repaired without draining (dumping) the boiler - ** VERIFIED
ANSWERS **✔✔stop
in a fuel oil system, the purpose of duplex strainers is to ______ - ** VERIFIED ANSWERS
**✔✔permit one strainer to be cleaned while the other is in service
the deaerator tank is located _____ - ** VERIFIED ANSWERS **✔✔above the feedwater pumps
no. _____ fuel oil needs to be heated before it is pumped so that it can flow - ** VERIFIED
ANSWERS **✔✔6
pulverized coal is ground into a fine powder and blown into the combustion chamber where it is
burned in a ______ - ** VERIFIED ANSWERS **✔✔suspension
water weighs approximately _____ lb/gal - ** VERIFIED ANSWERS **✔✔8.3
to prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one
_____ - ** VERIFIED ANSWERS **✔✔safety valve
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