Instructions:
Read each question carefully. Click on the radio button next to your answer. Once you are done, click on the "View your score" button at the end of the test.
1.
If a centrifugal pump’s NPSH required exceeds the NPSH available, the following will probably occur:
a)
Pump stops running
b)
Excessive rpm
c)
Cavitation
d)
Nothing will happen
2.
It is important to supply the proper amount of air to the combustion process because:
a)
It helps to control undesirable emissions
b)
It can improve boiler efficiency
c)
It can reduce FD and ID fan horsepower
d)
All of the above
3.
Excess air (air in excess of theoretical or stoichiometric requirements) is required when burning fuel due to the requirement to achieve intimate contact between every combustible particle and oxygen.
a)
True
b)
False
4.
Natural gas combustion is generally less efficient than fuel oil.
a)
True
b)
False
5.
Unburned carbon after the combustion process can be due to:
a)
Poor combustion control
b)
Improper fuel preparation
c)
Poorly maintained combustion equipment
d)
All of the above
6.
Water-cooled furnaces are preferred to refractory-lined furnaces because:
a)
More steam is generated in the unit
b)
They are larger in volume
c)
Lower maintenance costs
d)
Tubes are less expensive than refractory
7.
Three-element feedwater control is comprised of signals from:
a)
Fuel flow, feedwater flow, steam flow
b)
Drum level, fuel flow, feedwater flow
c)
Feedwater flow, steam flow, drum level
d)
None of the above
8.
To deaerate water, the temperature must be above 212ºF.
a)
True
b)
False
9.
Scale build-up can cause boiler tube failure.
a)
True
b)
False
10.
Steam deaeration gets absolutely all of the oxygen out of the water.
a)
True
b)
False
