Second Class Fireman Exam 2023| 83
Questions and Answers| A grade.
During the start up of a turbine are the drains open ? - -Yes, the turbine casing drains
and any steam line drains should be open until properly warmed up.
-How are the main steam and reheat steam lines pitched leaving the boiler? - -They
could be pitched away from the boiler.
-What are the functions of a deareator? - -Heat the feedwater, store the feedwater,
deaerate the feedwater and it can also act as a high pressure drain tank.
-If you had to perform internal work on a high pressure boiler that is connected in
battery with another boiler, what is required? - -The boiler must have two stop valves
with a free blow down drain between the two stop valves. The two valves must be closed
and the free blow drain open. If any steam is seen coming from the free blow drain , do
not enter the boiler.
-How do you convert #/hr into BHP? - -Divide by 34.5
-How many Btu's are there in a barrel of #6 fuel oil? - -There is approximately 150,000
Btu/gal and 42 gal per barrel, therefore:150,000x42=6,300,000 Btu/bbl.
-When is CO (carbon monoxide) formed in a boiler? - -During incomplete combustion.
-How much does one cubic foot of #6 oil weigh? - -Water weighs 62.5 pounds per cubic
foot and #6 oil weighs less than water. Specific gravity of #6 oil is .98 therfore:
62.5x.98=61 Pounds.
-How do you find boiler HP given the Btu's? - -Btu input divided by 41,840 or Btu
output divided by 33,475.
-What is a calorimeter used for? - -a steam calorimeter is measure the heat generated
by a change of state. A bomb calorimeter measures the Btu value of the fuel burned.
-How do you determine the hp of a steam turbine for licensing? - -By the external
diameter of the steam supply pipe. Chapter 146.
-How many btu's in a dekatherm? - -1,000,000
-how long can a plant operate without a EIC? - -7 days.
-if you are a license holder, when are you required to tell the DPS there is no EIC? - -
immediately.
, -what is the main difference between a huddling chamber and a nozzle reaction safety
valve? - -Method of how the valve pops (lifts) open.
-what is the purpose of a relief valve in a fuel system? - -Prevent over pressure of the
components in the event there is a flow stoppage.
-What is the purpose of an air chamber on a reciprocating feed pump? - -to make the
discharge of the pump more steady.
-what type of pump might you find shear pins? - -reciprocating pump
-what gases would a combustion control system monitor ? - -CO2, O2, and CO
-Why are phosphate added to a boiler? - -To attack calcium and add a slight increase to
the boiler water pH.
-How much clearance must an air tank have? - -12 inches all around the tank
-what is the asme stamp you would find on an air tank - -"U"
-a lwfco must be installed where in relation to the water gage glass? - -the primary
lwfco must be installed about 2 inches above the bottom of the glass. The secondary
must function prior to the water dropping out of sight in the glass.
-"nominal pipe size" in terms of saftey valves? - -the inlet size of the valve
-when performing refractory repairs to a boiler it is important to maintain ? - -the
angle of the refractory cone.
-if you noticed a high differential pressure on a fuel oil strainer, you should? - -switch
to another strainer
-what happens when phenolthalein is added to the boiler water sample - -it should
immediately turn pink
-a high pressure boiler must have _______ pressure controls - -operating recycle and
a high pressure limit control
-when installing a gag on a safety valve, you must ______. - -only tighten hand tight
so you do not damage the valve stem
-what is a accumulation test? - -test to verify safety valves capacity. close the steam stop
and fire the boiler at 100% load. after all safety valves have lifted , the pressure in the
boiler cannot go any higher than 6%of the highest set safety valve, but in no case any
higher that 6% of the mawp.
-average btu values of Coal, Oil, and natural gas. - -coal-14,000/lb
Questions and Answers| A grade.
During the start up of a turbine are the drains open ? - -Yes, the turbine casing drains
and any steam line drains should be open until properly warmed up.
-How are the main steam and reheat steam lines pitched leaving the boiler? - -They
could be pitched away from the boiler.
-What are the functions of a deareator? - -Heat the feedwater, store the feedwater,
deaerate the feedwater and it can also act as a high pressure drain tank.
-If you had to perform internal work on a high pressure boiler that is connected in
battery with another boiler, what is required? - -The boiler must have two stop valves
with a free blow down drain between the two stop valves. The two valves must be closed
and the free blow drain open. If any steam is seen coming from the free blow drain , do
not enter the boiler.
-How do you convert #/hr into BHP? - -Divide by 34.5
-How many Btu's are there in a barrel of #6 fuel oil? - -There is approximately 150,000
Btu/gal and 42 gal per barrel, therefore:150,000x42=6,300,000 Btu/bbl.
-When is CO (carbon monoxide) formed in a boiler? - -During incomplete combustion.
-How much does one cubic foot of #6 oil weigh? - -Water weighs 62.5 pounds per cubic
foot and #6 oil weighs less than water. Specific gravity of #6 oil is .98 therfore:
62.5x.98=61 Pounds.
-How do you find boiler HP given the Btu's? - -Btu input divided by 41,840 or Btu
output divided by 33,475.
-What is a calorimeter used for? - -a steam calorimeter is measure the heat generated
by a change of state. A bomb calorimeter measures the Btu value of the fuel burned.
-How do you determine the hp of a steam turbine for licensing? - -By the external
diameter of the steam supply pipe. Chapter 146.
-How many btu's in a dekatherm? - -1,000,000
-how long can a plant operate without a EIC? - -7 days.
-if you are a license holder, when are you required to tell the DPS there is no EIC? - -
immediately.
, -what is the main difference between a huddling chamber and a nozzle reaction safety
valve? - -Method of how the valve pops (lifts) open.
-what is the purpose of a relief valve in a fuel system? - -Prevent over pressure of the
components in the event there is a flow stoppage.
-What is the purpose of an air chamber on a reciprocating feed pump? - -to make the
discharge of the pump more steady.
-what type of pump might you find shear pins? - -reciprocating pump
-what gases would a combustion control system monitor ? - -CO2, O2, and CO
-Why are phosphate added to a boiler? - -To attack calcium and add a slight increase to
the boiler water pH.
-How much clearance must an air tank have? - -12 inches all around the tank
-what is the asme stamp you would find on an air tank - -"U"
-a lwfco must be installed where in relation to the water gage glass? - -the primary
lwfco must be installed about 2 inches above the bottom of the glass. The secondary
must function prior to the water dropping out of sight in the glass.
-"nominal pipe size" in terms of saftey valves? - -the inlet size of the valve
-when performing refractory repairs to a boiler it is important to maintain ? - -the
angle of the refractory cone.
-if you noticed a high differential pressure on a fuel oil strainer, you should? - -switch
to another strainer
-what happens when phenolthalein is added to the boiler water sample - -it should
immediately turn pink
-a high pressure boiler must have _______ pressure controls - -operating recycle and
a high pressure limit control
-when installing a gag on a safety valve, you must ______. - -only tighten hand tight
so you do not damage the valve stem
-what is a accumulation test? - -test to verify safety valves capacity. close the steam stop
and fire the boiler at 100% load. after all safety valves have lifted , the pressure in the
boiler cannot go any higher than 6%of the highest set safety valve, but in no case any
higher that 6% of the mawp.
-average btu values of Coal, Oil, and natural gas. - -coal-14,000/lb
