Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
1. #1 How can you loose your drinking on the job, sleeping on the job, negligence unsafe
license? work, signing a falsified license application for someone, fail-
ing to renew your license annually
2. #2 What must you do if you Notify city hall if you change jobs, address or retire
change jobs?
3. #3 Why should you do Find and correct problems to prevent breakdowns. Keeping
rounds? permanent records will make it easy to forecast most break-
downs because you will get to know equipment.
4. #4 What is a steam boiler? closed vessel, PARTIALLY FILLED WITH WATER, under pressure
that transforms water to steam with the application of heat.
5. #5 What are the requirements simple
of a good boiler? accommodate expansion & contraction
adequate steam and water space
efficient
responsive to demands
accessible for cleaning and repairs
safe
6. #6 Name and describe three RADIANT HEAT - transmitted from hot body to a cold body
types of heat transfer in boiler by means of direct radiation (heat from sun reaches us by
operation. radiation)
CONDUCTION - physical contact (coffee cup is heated by con-
duction when hot coffee touches the cup)
CONVECTION - carried along by a moving body such as air
or water (your living room is heated by warm air from your
furnace in another location
, Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
7. #7 What is a combustion the area of the boiler where COMPLETE burning of the fuel
chamber? occurs
8. #8 What is an internally fired those in which the grate and combustion chamber are en-
boiler? closed within the boiler shell.
----- -----
name 4 types Scotch marine, Vertical fire tube, Locomotive, Cast iron package
boiler
9. #9 What is an externally fired Externally fired boilers have the setting including the furnace
boiler and grates separate and distinct from the shell. Four types: HRT
----- set in brick work, some water tube boilers, Heine and Sterling.
name 4 types
10. #10 What is a crown sheet in a vertical firetube boiler holds the tubes and is thicker be-
and its purpose? cause it is exposed to the fire.
----- -----
what is a tube sheet and its holds the tubes and does not see the fire
purpose?
11. #11 What is a water leg on a space between the outer shell and the furnace containing boil-
boiler? er water. it absorbs heat that would be wasted and increases
the capacity of the boiler. the surfaces are flat and must be
stayed.
12. #12 Is an HRT Boiler set level INCLINED 1-3" front to rear to permit drainage and removal of
or inclined and why? impurities
----- -----
are HRT Boiler tubes set level INCLINED with the boiler
or inclined and why?
13. #13 Name 2 way to support 1) Suspended from hangars and supported by overhead
and take care of expansion of beams
, Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
an HRT Boiler 2) Set on saddles equipped with rollers to permit movement of
----- the boiler as it expands and contracts
Which way is best? -----
Suspended from hangars and supported by overhead beams
is best because it works no hardship on the furnace walls
14. #14 What is a longitudinal LONGITUDINAL JOINT - seam running the length of the shell
joint? and is butt strap construction or fusion welded. it is above the
----- fireline to avoid overheating.
What is a circumferential -----
joint? CIRCUMFERENTIAL JOINT - lap joint running the circumference
of the drum
15. #15 What is the difference be- Flue - 4" or more in diameter measured internally. Tube - 4" or
tween a flue and a tube? less in diameter measured externally
16. #16 What is a dry pipe and a steam separator located within the boiler shell and connected
where is it located? to the steam outlet. its upper surface is perforated. steam
enters the perforations rapidly changing its direction of flow
causing droplets and impurities to separate from the steam
before entering the steam outlet.
17. #17 Describe a Scotch Marine it is an internally fired self contained horizontal return firetube
Boiler? boiler.
----- -----
how it is fired it is a cylindrical shell containing the combustion chamber and
tubes that are surrounded by water.
18. #18 How is a Stirling Boiler lugs on the ends of the upper drums rest on the beams of its
suspended? structure. the lower (MUD) drum is suspended from the tubes
and is free to move by expansion.
19.
, Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
#19 Describe the circulation feed water enters the top rear drum, passes down the rear
of water within the Stirling tubes to the mud drum. steam and boiler water go up the front
Boiler 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.
20. #20 What provisions are some tubes are left out
made for tube removal on wa- the tubes are staggered
ter boilers? sometimes, every other row is omitted
21. #21 What is a water tube boil- in a water tube boiler, products of combustion pass around
er? tubes containing boiler water
----- -----
list 5 advantages ADVANTAGES:
----- 1) rapid steamers
list 5 disadvantages 2) use less water
----- 3) less chance of explosion
name 4 types 4) no flat surfaces
5) smaller tube sizes
-----
DISADVANTAGES:
1) elaborate settings
2) field assembled
3) initial cost per pound of steam is higher
4) greater number of openings thus more air infiltration
5) require more floor space
-----
TYPES:
1) B.&W.
2) Stirling
3) Heine
4) "D", "O", "A" type
Study online at https://quizlet.com/_7xhlco
1. #1 How can you loose your drinking on the job, sleeping on the job, negligence unsafe
license? work, signing a falsified license application for someone, fail-
ing to renew your license annually
2. #2 What must you do if you Notify city hall if you change jobs, address or retire
change jobs?
3. #3 Why should you do Find and correct problems to prevent breakdowns. Keeping
rounds? permanent records will make it easy to forecast most break-
downs because you will get to know equipment.
4. #4 What is a steam boiler? closed vessel, PARTIALLY FILLED WITH WATER, under pressure
that transforms water to steam with the application of heat.
5. #5 What are the requirements simple
of a good boiler? accommodate expansion & contraction
adequate steam and water space
efficient
responsive to demands
accessible for cleaning and repairs
safe
6. #6 Name and describe three RADIANT HEAT - transmitted from hot body to a cold body
types of heat transfer in boiler by means of direct radiation (heat from sun reaches us by
operation. radiation)
CONDUCTION - physical contact (coffee cup is heated by con-
duction when hot coffee touches the cup)
CONVECTION - carried along by a moving body such as air
or water (your living room is heated by warm air from your
furnace in another location
, Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
7. #7 What is a combustion the area of the boiler where COMPLETE burning of the fuel
chamber? occurs
8. #8 What is an internally fired those in which the grate and combustion chamber are en-
boiler? closed within the boiler shell.
----- -----
name 4 types Scotch marine, Vertical fire tube, Locomotive, Cast iron package
boiler
9. #9 What is an externally fired Externally fired boilers have the setting including the furnace
boiler and grates separate and distinct from the shell. Four types: HRT
----- set in brick work, some water tube boilers, Heine and Sterling.
name 4 types
10. #10 What is a crown sheet in a vertical firetube boiler holds the tubes and is thicker be-
and its purpose? cause it is exposed to the fire.
----- -----
what is a tube sheet and its holds the tubes and does not see the fire
purpose?
11. #11 What is a water leg on a space between the outer shell and the furnace containing boil-
boiler? er water. it absorbs heat that would be wasted and increases
the capacity of the boiler. the surfaces are flat and must be
stayed.
12. #12 Is an HRT Boiler set level INCLINED 1-3" front to rear to permit drainage and removal of
or inclined and why? impurities
----- -----
are HRT Boiler tubes set level INCLINED with the boiler
or inclined and why?
13. #13 Name 2 way to support 1) Suspended from hangars and supported by overhead
and take care of expansion of beams
, Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
an HRT Boiler 2) Set on saddles equipped with rollers to permit movement of
----- the boiler as it expands and contracts
Which way is best? -----
Suspended from hangars and supported by overhead beams
is best because it works no hardship on the furnace walls
14. #14 What is a longitudinal LONGITUDINAL JOINT - seam running the length of the shell
joint? and is butt strap construction or fusion welded. it is above the
----- fireline to avoid overheating.
What is a circumferential -----
joint? CIRCUMFERENTIAL JOINT - lap joint running the circumference
of the drum
15. #15 What is the difference be- Flue - 4" or more in diameter measured internally. Tube - 4" or
tween a flue and a tube? less in diameter measured externally
16. #16 What is a dry pipe and a steam separator located within the boiler shell and connected
where is it located? to the steam outlet. its upper surface is perforated. steam
enters the perforations rapidly changing its direction of flow
causing droplets and impurities to separate from the steam
before entering the steam outlet.
17. #17 Describe a Scotch Marine it is an internally fired self contained horizontal return firetube
Boiler? boiler.
----- -----
how it is fired it is a cylindrical shell containing the combustion chamber and
tubes that are surrounded by water.
18. #18 How is a Stirling Boiler lugs on the ends of the upper drums rest on the beams of its
suspended? structure. the lower (MUD) drum is suspended from the tubes
and is free to move by expansion.
19.
, Grade 3 Engineering Omaha exam prep by NAPE
Study online at https://quizlet.com/_7xhlco
#19 Describe the circulation feed water enters the top rear drum, passes down the rear
of water within the Stirling tubes to the mud drum. steam and boiler water go up the front
Boiler 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.
20. #20 What provisions are some tubes are left out
made for tube removal on wa- the tubes are staggered
ter boilers? sometimes, every other row is omitted
21. #21 What is a water tube boil- in a water tube boiler, products of combustion pass around
er? tubes containing boiler water
----- -----
list 5 advantages ADVANTAGES:
----- 1) rapid steamers
list 5 disadvantages 2) use less water
----- 3) less chance of explosion
name 4 types 4) no flat surfaces
5) smaller tube sizes
-----
DISADVANTAGES:
1) elaborate settings
2) field assembled
3) initial cost per pound of steam is higher
4) greater number of openings thus more air infiltration
5) require more floor space
-----
TYPES:
1) B.&W.
2) Stirling
3) Heine
4) "D", "O", "A" type
