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STEAM GENERATORS FINAL EXAM LATEST QUESTIONS WITH ALL CORRECT SOLUTIONS!!
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STEAM GENERATORS FINAL EXAM LATEST QUESTIONS WITH ALL CORRECT SOLUTIONS!!
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Name: Score:149 Multiple choice questions
Term 1 of 149
the ash content of a fuel oil is significant to the operating engineer because it _______.
is an indication of the amount of noncombustible material present in the oil
If one pound of steam at 250psia condenses to one pound of water, it will give up 825.1Btu
while changing state
Greater heat energy available per pound of steam
Corrosion of the heater due to low stack temperatures
Term 2 of 149
An indication of a moderate leak existing in a desuperheater is what?
Too much excess air
Sudden decrease in superheater outlet temperature
Saturation temperature
Low auxiliary steam temperature
Term 3 of 149
Which of the following statements represents the primary function of hand holes used on a
boiler?
Lower the adjusting ring
The temperature at which they perform
To allow access into the headers
Etching of the glass
,Term 4 of 149
what is the purpose of the moveable air doors in an air register?
regulate the temperature of air entering the furnace
maintain airflow across the forced draft fan
function to open and close the register
securing fo to the burner
Term 5 of 149
Water circulates within a natural circulation boiler as a result of the _______.
Angle of tube inclination
Remove heavy solids from the water drum
Lower the adjusting ring
Differences in density within the circulating medium
Term 6 of 149
Overheating of the generating tubes will occur when a boiler reaches its end point of _______.
Conduction
Circulation
Excretion
Ventilation
,Term 7 of 149
When heated, brickwork in a boiler is kept from buckling by the installation of _______.
Expansion joints
Control joints
Thermal expansion
Thermal fittings
Term 8 of 149
The ratio of Btu per pound of fuel absorbed by the water and steam to the Btu per pound of fuel
burned is the _______.
Boiler Efficiency
Specific Heat
Heating Surface Efficiency
Combustion Efficiency
Term 9 of 149
When a vessel is in port, stack type air heaters are bypassed in order to prevent what?
Results from a change in steam flow or firing rate
Superheater vent
There is no steam flow through the superheater
Corrosion of the heater due to low stack temperatures
, Term 10 of 149
Boiler fuel savings gained by the use of an economizer can amount to _______.
Blow through the bottom (water) connection first
1% for each 10°F rise in feed water temperature
Differences in density within the circulating medium
Greater heat energy available per pound of steam
Term 11 of 149
according to Coast Guard Regulations (46 CFR), what is the minimum flash point of oil to be used
as fuel for the boilers?
150°f (43.3°c)
140°F (43.3°C)
140°f (57.3°c)
foaming/priming
Term 12 of 149
Over time, boiler water tends to become more acidic. What chemicals can be added to bring the
water to the proper alkaline PH range?
Too much excess air
Carbon/chromium & nickel
Caustic soda & caustic potash
High superheater outlet temperature
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