3rd stationary engineer A B Test
|\ |\ |\ |\ |\ |\
questions with answers |\ |\
Radiant heat - Transmitted from hot body to a cold body by
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
means of direct radiation |\ |\ |\ |\
Co - CORRECT ANSWERS ✔✔AB 6. 3 types of heat transfer
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The area of the boiler where the complete burning of fuel occurs.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
- CORRECT ANSWERS ✔✔A 7. What is a combustion chamber?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Internally fired boilers have the grates and combustion chamber
|\ |\ |\ |\ |\ |\ |\ |\ |\
enclosed within the boiler shell. |\ |\ |\ |\
Scotch Marine |\
Vertical Fire Tube |\ |\
Locomotive |\
Cast Iron Package - CORRECT ANSWERS ✔✔B 8. What is an
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
internally fired boiler and 4 types |\ |\ |\ |\ |\
It can be set on saddles equipped with rollers to permit
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
movement of the boiler as it expands and contracts. It may also
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
be suspended from hangers and supported by overhead beams.
|\ |\ |\ |\ |\ |\ |\ |\ |\
Hanging by beams is best, puts no hardship on furnace walls. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 13. Name 2 ways to support and take
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
care of expansion in a HRT boiler. Which way is best?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
,A longitudinal joint is a seam running the length of the shell and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
it is butt strapped or fusion welded. It is above the fire line to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
avoid overheating. |\
Lap joint running the circumference of the drum. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔B 14. What is a longitudinal Joint? |\ |\ |\ |\ |\ |\ |\
What is a circumfermential joint?
|\ |\ |\ |\
It is an internally fired self contained horizontal return fire boiler.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
It is a cylindrical shell containing the combustion chamber and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
tubes that are surrounded by water. - CORRECT ANSWERS ✔✔B
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
17.Describe a scotch marine boiler and how its fired |\ |\ |\ |\ |\ |\ |\ |\
feed water enters the top rear drum, passes down the rear tubes
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the mud drum. steam and boiler water go up the front and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
center tubes to the front and center drums. CIRCULATING TUBES
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
allow boiler water to pass between the drums. what does not go
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
out as steam, goes back down the rear tubes. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔B 19. Describe the circulation of water within a |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Stirling boiler. |\
Stay bolts and through stays. These sometimes will have a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
telltale drilled in them. - CORRECT ANSWERS ✔✔B 23. What type
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
of stays are used in a wet back scotch marine boiler.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
A bank of tubes through which only steam passes through
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
without raising pressure. |\ |\
Advantages: increased efficiency of boilers, delivering drier |\ |\ |\ |\ |\ |\ |\
steam. Drier steam can be transmitted long distances with
|\ |\ |\ |\ |\ |\ |\ |\ |\
minimal heat loss. With drier steam condensation and corrosion
|\ |\ |\ |\ |\ |\ |\ |\ |\
,are reduced. - CORRECT ANSWERS ✔✔B 25. What is a super
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
heater? What are the advantages? |\ |\ |\ |\
Economizer: heat exchanger located in the breaching between |\ |\ |\ |\ |\ |\ |\ |\
the boiler and stack designed to recover waste heat from the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
products of combustion by preheating the feedwater |\ |\ |\ |\ |\ |\ |\
Air preheater: consists of a series of tubes or plates that have hot
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
gases on one side and incoming air on the other. heat in the hot
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
gasses leaving the boiler is recovered by the incoming air.
|\ |\ |\ |\ |\ |\ |\ |\ |\
both reduce stack temperatures and increase boiler efficiency -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 27. What is an economize? What is an |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
air preheater?
|\
D x D x .7854
|\ |\ |\ |\
1 x 1 x .7854 = .7854sq" - CORRECT ANSWERS ✔✔B 30. Cross
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
section of a 1" bolt |\ |\ |\ |\
The comparison of the tensile strength to the actual working
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
stress or the bursting pressure divided by the working pressure. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 33. What is meant by "factor of safety"
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
New Boiler 4 |\ |\
Preowned constructed to ASME standards 5 |\ |\ |\ |\ |\
Flywheel 3 |\
Pipe 8 - CORRECT ANSWERS ✔✔B 34. What is the factor of safety
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
for boilers, flywheels, and pipes?
|\ |\ |\ |\ |\
, LAP JOINT = when one plate overlaps the other and is joined
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
-----
BUTT JOINT = when two ends of the plate meet end to end and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
are joined |\
-----
BUTT-STRAP JOINT = when two ends of the plate meet end to end |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and are joined by a plate. (one plate is a single butt strap joint /
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
two plates are a double butt strap joint) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔B 35. What is a lap joint? What is a butt joint? What is a butt
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
strap joint? |\
There are no stays. The head of the boiler drum is shaped with a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
die, which dishes and forms them into the shape they would take
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
as a result of the pressure to which they will be subjected to. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 39. What type of stays are used in the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
heads of water tub boilers and why? |\ |\ |\ |\ |\ |\
To improve carryover which will reduce carryover - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔A 40. Why is a row of tubes sometimes left out of |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
an HRT boiler?
|\ |\
Fire tube boiler tubes are rolled and beaded to prevent heat
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
damage, and to keep them from pulling out. |\ |\ |\ |\ |\ |\ |\
Water tube boilers are rolled then flared to keep them from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pulling out. Also for drainage in the upper drum and prevent air
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pockets in the lower drum. - CORRECT ANSWERS ✔✔AB 41. In a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
fire tube boiler how are tubes secured in a tube sheet and why?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
|\ |\ |\ |\ |\ |\
questions with answers |\ |\
Radiant heat - Transmitted from hot body to a cold body by
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
means of direct radiation |\ |\ |\ |\
Co - CORRECT ANSWERS ✔✔AB 6. 3 types of heat transfer
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The area of the boiler where the complete burning of fuel occurs.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
- CORRECT ANSWERS ✔✔A 7. What is a combustion chamber?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Internally fired boilers have the grates and combustion chamber
|\ |\ |\ |\ |\ |\ |\ |\ |\
enclosed within the boiler shell. |\ |\ |\ |\
Scotch Marine |\
Vertical Fire Tube |\ |\
Locomotive |\
Cast Iron Package - CORRECT ANSWERS ✔✔B 8. What is an
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
internally fired boiler and 4 types |\ |\ |\ |\ |\
It can be set on saddles equipped with rollers to permit
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
movement of the boiler as it expands and contracts. It may also
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
be suspended from hangers and supported by overhead beams.
|\ |\ |\ |\ |\ |\ |\ |\ |\
Hanging by beams is best, puts no hardship on furnace walls. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 13. Name 2 ways to support and take
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
care of expansion in a HRT boiler. Which way is best?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
,A longitudinal joint is a seam running the length of the shell and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
it is butt strapped or fusion welded. It is above the fire line to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
avoid overheating. |\
Lap joint running the circumference of the drum. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔B 14. What is a longitudinal Joint? |\ |\ |\ |\ |\ |\ |\
What is a circumfermential joint?
|\ |\ |\ |\
It is an internally fired self contained horizontal return fire boiler.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
It is a cylindrical shell containing the combustion chamber and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
tubes that are surrounded by water. - CORRECT ANSWERS ✔✔B
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
17.Describe a scotch marine boiler and how its fired |\ |\ |\ |\ |\ |\ |\ |\
feed water enters the top rear drum, passes down the rear tubes
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to the mud drum. steam and boiler water go up the front and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
center tubes to the front and center drums. CIRCULATING TUBES
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
allow boiler water to pass between the drums. what does not go
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
out as steam, goes back down the rear tubes. - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔B 19. Describe the circulation of water within a |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Stirling boiler. |\
Stay bolts and through stays. These sometimes will have a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
telltale drilled in them. - CORRECT ANSWERS ✔✔B 23. What type
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
of stays are used in a wet back scotch marine boiler.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
A bank of tubes through which only steam passes through
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
without raising pressure. |\ |\
Advantages: increased efficiency of boilers, delivering drier |\ |\ |\ |\ |\ |\ |\
steam. Drier steam can be transmitted long distances with
|\ |\ |\ |\ |\ |\ |\ |\ |\
minimal heat loss. With drier steam condensation and corrosion
|\ |\ |\ |\ |\ |\ |\ |\ |\
,are reduced. - CORRECT ANSWERS ✔✔B 25. What is a super
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
heater? What are the advantages? |\ |\ |\ |\
Economizer: heat exchanger located in the breaching between |\ |\ |\ |\ |\ |\ |\ |\
the boiler and stack designed to recover waste heat from the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
products of combustion by preheating the feedwater |\ |\ |\ |\ |\ |\ |\
Air preheater: consists of a series of tubes or plates that have hot
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
gases on one side and incoming air on the other. heat in the hot
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
gasses leaving the boiler is recovered by the incoming air.
|\ |\ |\ |\ |\ |\ |\ |\ |\
both reduce stack temperatures and increase boiler efficiency -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 27. What is an economize? What is an |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
air preheater?
|\
D x D x .7854
|\ |\ |\ |\
1 x 1 x .7854 = .7854sq" - CORRECT ANSWERS ✔✔B 30. Cross
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
section of a 1" bolt |\ |\ |\ |\
The comparison of the tensile strength to the actual working
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
stress or the bursting pressure divided by the working pressure. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 33. What is meant by "factor of safety"
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
New Boiler 4 |\ |\
Preowned constructed to ASME standards 5 |\ |\ |\ |\ |\
Flywheel 3 |\
Pipe 8 - CORRECT ANSWERS ✔✔B 34. What is the factor of safety
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
for boilers, flywheels, and pipes?
|\ |\ |\ |\ |\
, LAP JOINT = when one plate overlaps the other and is joined
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
-----
BUTT JOINT = when two ends of the plate meet end to end and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
are joined |\
-----
BUTT-STRAP JOINT = when two ends of the plate meet end to end |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
and are joined by a plate. (one plate is a single butt strap joint /
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
two plates are a double butt strap joint) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔B 35. What is a lap joint? What is a butt joint? What is a butt
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
strap joint? |\
There are no stays. The head of the boiler drum is shaped with a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
die, which dishes and forms them into the shape they would take
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
as a result of the pressure to which they will be subjected to. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔B 39. What type of stays are used in the |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
heads of water tub boilers and why? |\ |\ |\ |\ |\ |\
To improve carryover which will reduce carryover - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔A 40. Why is a row of tubes sometimes left out of |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
an HRT boiler?
|\ |\
Fire tube boiler tubes are rolled and beaded to prevent heat
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
damage, and to keep them from pulling out. |\ |\ |\ |\ |\ |\ |\
Water tube boilers are rolled then flared to keep them from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pulling out. Also for drainage in the upper drum and prevent air
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pockets in the lower drum. - CORRECT ANSWERS ✔✔AB 41. In a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
fire tube boiler how are tubes secured in a tube sheet and why?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
