Thirds Written Test Massachusetts |\ |\ |\ |\
Stationary Engineer 3rd Class Exam with |\ |\ |\ |\ |\ |\
answers
What is the procedure for a low water condition?
|\ |\ |\ |\ |\ |\ |\ |\
What is the procedure when you have low water level condition
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in the boiler?
|\ |\
Secure Fuel. Turn on forced draft fans to cool boiler. DO NOT add
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
water. Feedwater line should be shut after securing burner
|\ |\ |\ |\ |\ |\ |\ |\
Diagnose: Blowdown Gauge Glass, Check Feedwater Regulator,
|\ |\ |\ |\ |\ |\ |\
Inlet Valve positions.
|\ |\
Why is more fuel needed for higher steam pressure than low
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pressure?
That is because higher steam pressure innately has more energy
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in it and therefore requires the absorption of more BTUs from the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
fuel than lower pressure steam would. (i.e. steam tables - higher
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
enthalpy values for higher pressure steam)|\ |\ |\ |\ |\
How do you find the horsepower of a boiler?
|\ |\ |\ |\ |\ |\ |\ |\
According to state how is boiler HP determined |\ |\ |\ |\ |\ |\ |\
Manufacturer's Tag. Steam Output divided by 34.5. BTU/hr IN |\ |\ |\ |\ |\ |\ |\ |\ |\
divided by 41840. BTU/hr OUT divided by 33475. Chapter 146
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Section 48 |\
,Give two examples of how to find the heating value of fuel oil.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Explain one. |\
API Formula: gravity BTU/lb of oil = 17687*API gravity @60 Deg F
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Ultimate Analysis: NOCASH (nitrogen, oxygen, carbon, ash, sulfur,
|\ |\ |\ |\ |\ |\ |\
and hydrogen) breaks down the fuel into the NOCASH elements
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
then plugging these results into dulongs formula =
|\ |\ |\ |\ |\ |\ |\ |\
14540C+62000(H-O/8)+4050S
Please give reasons and the importance of why a boiler needs to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
have a rapid heat transfer between the combustion of fuel oil
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and the water. Give reasons for materials that stop that transfer.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Why is good heat transfer in boiler wanted
|\ |\ |\ |\ |\ |\ |\
Efficiency. The higher the rate of heat transfer, the more energy
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
you are able to get out of your fuel and into the water. Poor heat
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
transfer can be due to tube damage from bad water treatment
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
(causing holes/blisters) or hardness build up which insulates the
|\ |\ |\ |\ |\ |\ |\ |\ |\
tubes from proper heat transfer.
|\ |\ |\ |\
What are the usual difficulties of surface condensers?
|\ |\ |\ |\ |\ |\ |\
What are some of the problems that can occur with surface
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
condensers?
Surface condensers are shell and tube heat exchangers. Surface
|\ |\ |\ |\ |\ |\ |\ |\ |\
Condensers can lose vacuum due to excess air leakage at the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
gland seals of the turbine. The air ejector tubes may be fouled or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
, the jets are misaligned. Hotwell level is too high or loss of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
suction on the hotwell pumps. Cooling water tubes may be fouled
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
or not enough flow is going through or the water temp is too
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
high.
What is low CO2? What does low CO2 indicate?
|\ |\ |\ |\ |\ |\ |\ |\
Incomplete combustion due to too much excess air causing the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
combustion to not occur efficiently. |\ |\ |\ |\
If a bourbon tube is dropped 200 ft. into the bottom of a water
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
storage tank, what would be the pressure reading on the gauge?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Explain why that is. |\ |\ |\
Bourdon tube dropped in 200 foot deep tank of water what's it
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
read and why |\ |\
It would read 0 because the gauge uses differential pressure from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the outside atmosphere to get a reading.
|\ |\ |\ |\ |\ |\ |\
When bringing a high-pressure boiler offline when do you shut off
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the (A. The feedwater line. B. the main steam stop valve. C.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Steam header valve.)? |\ |\
How to know when to secure feed water when taking a boiler
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
offline and how to know when to close the close main steam stop
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and header valve
|\ |\ |\
You can secure the feedwater line once the burners are off and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the boiler is no longer producing steam. Secure the Main Steam
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Stationary Engineer 3rd Class Exam with |\ |\ |\ |\ |\ |\
answers
What is the procedure for a low water condition?
|\ |\ |\ |\ |\ |\ |\ |\
What is the procedure when you have low water level condition
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in the boiler?
|\ |\
Secure Fuel. Turn on forced draft fans to cool boiler. DO NOT add
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
water. Feedwater line should be shut after securing burner
|\ |\ |\ |\ |\ |\ |\ |\
Diagnose: Blowdown Gauge Glass, Check Feedwater Regulator,
|\ |\ |\ |\ |\ |\ |\
Inlet Valve positions.
|\ |\
Why is more fuel needed for higher steam pressure than low
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pressure?
That is because higher steam pressure innately has more energy
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in it and therefore requires the absorption of more BTUs from the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
fuel than lower pressure steam would. (i.e. steam tables - higher
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
enthalpy values for higher pressure steam)|\ |\ |\ |\ |\
How do you find the horsepower of a boiler?
|\ |\ |\ |\ |\ |\ |\ |\
According to state how is boiler HP determined |\ |\ |\ |\ |\ |\ |\
Manufacturer's Tag. Steam Output divided by 34.5. BTU/hr IN |\ |\ |\ |\ |\ |\ |\ |\ |\
divided by 41840. BTU/hr OUT divided by 33475. Chapter 146
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Section 48 |\
,Give two examples of how to find the heating value of fuel oil.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Explain one. |\
API Formula: gravity BTU/lb of oil = 17687*API gravity @60 Deg F
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Ultimate Analysis: NOCASH (nitrogen, oxygen, carbon, ash, sulfur,
|\ |\ |\ |\ |\ |\ |\
and hydrogen) breaks down the fuel into the NOCASH elements
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
then plugging these results into dulongs formula =
|\ |\ |\ |\ |\ |\ |\ |\
14540C+62000(H-O/8)+4050S
Please give reasons and the importance of why a boiler needs to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
have a rapid heat transfer between the combustion of fuel oil
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and the water. Give reasons for materials that stop that transfer.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Why is good heat transfer in boiler wanted
|\ |\ |\ |\ |\ |\ |\
Efficiency. The higher the rate of heat transfer, the more energy
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
you are able to get out of your fuel and into the water. Poor heat
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
transfer can be due to tube damage from bad water treatment
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
(causing holes/blisters) or hardness build up which insulates the
|\ |\ |\ |\ |\ |\ |\ |\ |\
tubes from proper heat transfer.
|\ |\ |\ |\
What are the usual difficulties of surface condensers?
|\ |\ |\ |\ |\ |\ |\
What are some of the problems that can occur with surface
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
condensers?
Surface condensers are shell and tube heat exchangers. Surface
|\ |\ |\ |\ |\ |\ |\ |\ |\
Condensers can lose vacuum due to excess air leakage at the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
gland seals of the turbine. The air ejector tubes may be fouled or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
, the jets are misaligned. Hotwell level is too high or loss of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
suction on the hotwell pumps. Cooling water tubes may be fouled
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
or not enough flow is going through or the water temp is too
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
high.
What is low CO2? What does low CO2 indicate?
|\ |\ |\ |\ |\ |\ |\ |\
Incomplete combustion due to too much excess air causing the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
combustion to not occur efficiently. |\ |\ |\ |\
If a bourbon tube is dropped 200 ft. into the bottom of a water
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
storage tank, what would be the pressure reading on the gauge?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Explain why that is. |\ |\ |\
Bourdon tube dropped in 200 foot deep tank of water what's it
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
read and why |\ |\
It would read 0 because the gauge uses differential pressure from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the outside atmosphere to get a reading.
|\ |\ |\ |\ |\ |\ |\
When bringing a high-pressure boiler offline when do you shut off
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the (A. The feedwater line. B. the main steam stop valve. C.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Steam header valve.)? |\ |\
How to know when to secure feed water when taking a boiler
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
offline and how to know when to close the close main steam stop
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and header valve
|\ |\ |\
You can secure the feedwater line once the burners are off and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the boiler is no longer producing steam. Secure the Main Steam
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
