4th Class Power Engineering Part B Unit 4 - Boiler Plant Operation
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Grado
Power Engineering
Institución
Power Engineering
4th Class Power Engineering Part B Unit 4 - Boiler Plant Operation
What is a step that would NOT be done prior to lighting off a boiler - ANS Open the blow-off valve
A process done to a boiler in order to remove any grease or oil from the heating surface when the boiler is brand new - ANS ...
4th Class Power Engineering Part B Unit 4
- Boiler Plant Operation
What is a step that would NOT be done prior to lighting off a boiler - ANS Open the
blow-off valve
A process done to a boiler in order to remove any grease or oil from the heating surface
when the boiler is brand new - ANS Boiler Boil Out
A
Most important pre-start up check for a boiler - ANS Water Level
VI
While a boiler is warming up, it is good practice to - ANS Ensure proper operation of
the low water fuel cut-off
TU
If a new boiler is not properly boiled out, it may result in a - ANS Foaming condition
occurring
IS
A process done to a boiler in order to dry out new refractory - ANS Boiler dry-out
Before starting up a new boiler or one that has been out of service the following must be
OM
ensured - ANS The boiler has a valid inspection certificate
During start up of a boiler, the vent on the steam drum is - ANS Opened to allow the
escape of non-condensable air
NA
Before starting boiler draft fan(s), the operator should ensure that they - ANS Check
for adequate lubrication in the bearings
New refractory must be thoroughly and properly cured with a light fire because - ANS
JP
It contains moisture that can cause it to fracture if not cured
Boiler boiling out procedure should be done with an - ANS Alkaline solution
Before filling a boiler with water, the engineer should ensure that - ANS Blow off
valves are closed, Drum vent is open
A gradual increase in stack temperature, after warm up, is an indication of - ANS
Unclean heating surfaces
, According to the recommended rules for operation of hot water heating boilers, when
cutting in an additional boiler into the heating system the __________until the boiler is
warmed up - ANS Stop valves in the supply and return lines are both closed
It is vitally important to slowly heat up a cold boiler to prevent - ANS Uneven
expansion
Slight smoking during the start-up of a cold oil-fired boiler is caused by - ANS Oil and
furnace temperatures not yet up to operational parameters
A
Upon starting, a cold gas-fired boiler water initially may leak from the reversing
VI
chambers due to - ANS Combustion gases are condensing on cold boiler surfaces
According to the recommended rules for operation of hot water heating boilers, when
TU
cutting in an additional boiler into the heating system once the boiler reaches operating
temperature - ANS Supply and return line valves are both open slowly
A power boiler main steam outlet valve is usually called the - ANS Non-return valve
IS
If three boilers each have a pressure of 130 kPa, the pressure in the steam header will
be - ANS 130 kPa
OM
The boiler is filled with water and before you can light up the furnace, what must you do
first? - ANS Purge the furnace thoroughly
The drain on the non-return valve is actually connected - ANS Internally to the
NA
downstream side of the valve plug
The piping between the boiler non-return valve and the steam header valve is called the
- ANS Boiler steam line
JP
The point that a pressurized steam boiler begins to deliver steam to a header that is
being supplied by other boilers is referred to as - ANS Cutting the boiler into the
header
The purpose of a "double block and bleed" gas valve arrangement is to - ANS Prevent
gas from entering the furnace when the boiler is down
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