DC 3rd Class Test nb nb nb
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nb nb nb
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1. The component in which liquid vapor by absorbing heat is called?
nb nb nb nb nb nb nb nb nb nb
: evaporatornb
2. the best answer for an electrical grounding method?: Metal stake drive
nb nb nb nb nb nb nb nb nb nb nb
8 foot into the ground.
nb nb nb nb
3. A valve should be used for throttling purposes?: Globe
nb nb nb nb nb nb nb nb
4. What is the acceptable range for residual sodium sulfite in the
n b n b n b n b n b n b n b n b n b n b n b
boiler main- tain?: 30-70 n b nb nb
5. What is the BTU content of a gallon of #4 fuel oil?: 146,000
nb nb nb nb nb nb nb nb nb nb nb nb
6. What does a zeolite water softener system use as a means of rege
nb nb nb nb nb nb nb nb nb nb nb nb
neration?-
: brine
nb
7. What are the 4 steps for a Zeolite Rejuvenation water softener proc
nb nb nb nb nb nb nb nb nb nb nb
ess?: Back- wash, Brine, Rinse, Service
nb nb nb nb nb
8. Where medium temperature liquid found?: Condensern b n b n b n b n b
9. Where is high temperature vapor found?: At the discharge of the compressor
nb nb nb nb nb nb nb nb nb nb nb
or condenser
nb nb
10. What stays are used to support the burner chamber in a n b n b n b n b n b n b n b n b n b n b
scotch marine boiler?: Diagonal Stays
n b n b nb nb nb
11. What type of safety valve is this?: ( Full) Crosby nozzle-
nb nb nb nb nb nb nb nb nb nb
type safety valve. Page 365 BOG
nb nb nb nb nb
12. Where do you get superheat reading?: Take suction line pressure nb nb nb nb nb nb nb nb nb
13. Name the wire that connects all component of a system nb nb nb nb nb nb nb nb nb n
bto a physical ground or water pipe?: Grounding electrode conductor
nb nb nb nb nb nb nb nb nb
14. Where do you get sub- nb nb nb nb
cooling reading?: Take liquid line pressure Cross reference to te
nb nb nb nb nb nb nb nb nb
mperature using a P/T Chart nb nb nb nb
Get liquid line temperature
nb nb nb
Subtract actual temperature from cross referenced tem
nb nb nb nb nb nb
perature Result is Sub coolingnb nb nb nb
15. On the boilers that have both Quick opening and Screw typ
n b n b n b n b n b n b n b n b n b n b
e blow down valves, the Quick opening valve must be located?: closest to th
n b n b nb nb nb nb nb nb nb nb nb nb nb
e boiler and followed by the screw-type valve
nb nb nb nb nb nb nb
16. High pressure boilers equipped with Quick opening and Scr n b n b n b n b n b n b n b n b
1nb/
nb31
, DC 3rd Class Test
nb nb nb
Study online at https://quizlet.com/
nb nb nb
ew n b
_iqudw2
type valves are blown
down how?: By opening the Quick opening valve first and
n b nb nb nb nb nb nb nb nb nb nb nb nb
closing it Last.
nb nb nb
17. ASME Code defines a slow opening valve as what?: One requiring at l
nb nb nb nb nb nb nb nb nb nb nb nb
east 5 full 360 degree turns between full open and close position.
nb nb nb nb nb nb nb nb nb nb nb
2nb/
nb31
, DC 3rd Class Test nb nb nb
Study online at https://quizlet.com/
nb nb nb
_iqudw2
18. A 300 Horsepower boiler operating at 100psi has an avera
n b n b n b n b n b n b n b n b n b
ge load of 75% with 80% condensate return and 5% blow down.
n b n b n b nb n b n b n b n b n b n b n b n b
The treatment provides a chemical which costs $8.75 per gallon,
n b n b n b nb n b n b n b n b n b n b
and will treat 600 gallon. Find the amount of the chemical neede
n b n b n b n b n b n b nb n b n b n b n b
d for the day period, and the cost of the chemical for a 30 days pe
n b n b n b n b n b n b n b n b n b nb nb nb nb nb nb
riod?: Water In = Water Out nb nb nb nb nb
Makeup + Condensate Return = Evaporator + Blow Down
nb nb nb nb nb nb nb nb
Average Evaporator Rate = 300 x 34.5 pph x .75% load = 7762, 50 pph
nb nb nb nb nb nb nb nb nb nb nb nb nb nb
1 Month + .8( 7762.50 pph) = 7762.50 pph + 0500 m
nb nb nb nb nb nb nb nb nb nb nb
1 Month + 6210 pph = 7762.50 pph + .0500 m
nb nb nb nb nb nb nb nb nb nb
-6210 -6210 nb
1 Month = 1552.5 pph + .0500
nb nb nb nb nb nb
.9500 m = 1552.5 pph
nb nb nb nb
.9500m .9500 nb
1Month = 1,634.21 pph nb nb nb
Gallons per Month = 1634..33 x 24 x 30 = 141, 252.24 gallons per month
nb nb nb nb nb nb nb nb nb nb nb nb nb nb nb nb
Chemical needed = 141,252.24 gallon / 600 gallon = 235, 40 gallon
nb nb nb nb nb nb nb nb nb nb nb
Cost per month = 235, 40 gallon x 8.75 = $2,059.75
nb nb nb nb nb nb nb nb nb nb
19. During a 24 hours operation how often should you check t n b n b n b n b n b n b n b n b n b n b
he water level?- n b n b
: once per shift
nb nb nb
20. How often do you check the high limit switch?: Annually nb nb nb nb nb nb nb nb nb
21. What is the recommended time for a complete external n b n b n b n b n b n b n b n b n b
inspection of a boiler?: once per shift n b n b n b nb nb nb
22. What is the first thing to do when shutting down a boiler?: To tur nb nb nb nb nb nb nb nb nb nb nb nb nb
n ott the fire nb nb nb
23. A flow control should be blown down when?: once per shift
nb nb nb nb nb nb nb nb nb nb
3nb/
nb31
, DC 3rd Class Test
nb nb nb
Study online at https://quizlet.com/
nb nb nb
24. _iqudw2
How often should
nb nb nb you check the Low Water Fuel Cut off?: once p
nb nb nb nb nb nb nb nb nb
er shift nb
4nb/
nb31
Study online at https://quizlet.com/
nb nb nb
_iqudw2
1. The component in which liquid vapor by absorbing heat is called?
nb nb nb nb nb nb nb nb nb nb
: evaporatornb
2. the best answer for an electrical grounding method?: Metal stake drive
nb nb nb nb nb nb nb nb nb nb nb
8 foot into the ground.
nb nb nb nb
3. A valve should be used for throttling purposes?: Globe
nb nb nb nb nb nb nb nb
4. What is the acceptable range for residual sodium sulfite in the
n b n b n b n b n b n b n b n b n b n b n b
boiler main- tain?: 30-70 n b nb nb
5. What is the BTU content of a gallon of #4 fuel oil?: 146,000
nb nb nb nb nb nb nb nb nb nb nb nb
6. What does a zeolite water softener system use as a means of rege
nb nb nb nb nb nb nb nb nb nb nb nb
neration?-
: brine
nb
7. What are the 4 steps for a Zeolite Rejuvenation water softener proc
nb nb nb nb nb nb nb nb nb nb nb
ess?: Back- wash, Brine, Rinse, Service
nb nb nb nb nb
8. Where medium temperature liquid found?: Condensern b n b n b n b n b
9. Where is high temperature vapor found?: At the discharge of the compressor
nb nb nb nb nb nb nb nb nb nb nb
or condenser
nb nb
10. What stays are used to support the burner chamber in a n b n b n b n b n b n b n b n b n b n b
scotch marine boiler?: Diagonal Stays
n b n b nb nb nb
11. What type of safety valve is this?: ( Full) Crosby nozzle-
nb nb nb nb nb nb nb nb nb nb
type safety valve. Page 365 BOG
nb nb nb nb nb
12. Where do you get superheat reading?: Take suction line pressure nb nb nb nb nb nb nb nb nb
13. Name the wire that connects all component of a system nb nb nb nb nb nb nb nb nb n
bto a physical ground or water pipe?: Grounding electrode conductor
nb nb nb nb nb nb nb nb nb
14. Where do you get sub- nb nb nb nb
cooling reading?: Take liquid line pressure Cross reference to te
nb nb nb nb nb nb nb nb nb
mperature using a P/T Chart nb nb nb nb
Get liquid line temperature
nb nb nb
Subtract actual temperature from cross referenced tem
nb nb nb nb nb nb
perature Result is Sub coolingnb nb nb nb
15. On the boilers that have both Quick opening and Screw typ
n b n b n b n b n b n b n b n b n b n b
e blow down valves, the Quick opening valve must be located?: closest to th
n b n b nb nb nb nb nb nb nb nb nb nb nb
e boiler and followed by the screw-type valve
nb nb nb nb nb nb nb
16. High pressure boilers equipped with Quick opening and Scr n b n b n b n b n b n b n b n b
1nb/
nb31
, DC 3rd Class Test
nb nb nb
Study online at https://quizlet.com/
nb nb nb
ew n b
_iqudw2
type valves are blown
down how?: By opening the Quick opening valve first and
n b nb nb nb nb nb nb nb nb nb nb nb nb
closing it Last.
nb nb nb
17. ASME Code defines a slow opening valve as what?: One requiring at l
nb nb nb nb nb nb nb nb nb nb nb nb
east 5 full 360 degree turns between full open and close position.
nb nb nb nb nb nb nb nb nb nb nb
2nb/
nb31
, DC 3rd Class Test nb nb nb
Study online at https://quizlet.com/
nb nb nb
_iqudw2
18. A 300 Horsepower boiler operating at 100psi has an avera
n b n b n b n b n b n b n b n b n b
ge load of 75% with 80% condensate return and 5% blow down.
n b n b n b nb n b n b n b n b n b n b n b n b
The treatment provides a chemical which costs $8.75 per gallon,
n b n b n b nb n b n b n b n b n b n b
and will treat 600 gallon. Find the amount of the chemical neede
n b n b n b n b n b n b nb n b n b n b n b
d for the day period, and the cost of the chemical for a 30 days pe
n b n b n b n b n b n b n b n b n b nb nb nb nb nb nb
riod?: Water In = Water Out nb nb nb nb nb
Makeup + Condensate Return = Evaporator + Blow Down
nb nb nb nb nb nb nb nb
Average Evaporator Rate = 300 x 34.5 pph x .75% load = 7762, 50 pph
nb nb nb nb nb nb nb nb nb nb nb nb nb nb
1 Month + .8( 7762.50 pph) = 7762.50 pph + 0500 m
nb nb nb nb nb nb nb nb nb nb nb
1 Month + 6210 pph = 7762.50 pph + .0500 m
nb nb nb nb nb nb nb nb nb nb
-6210 -6210 nb
1 Month = 1552.5 pph + .0500
nb nb nb nb nb nb
.9500 m = 1552.5 pph
nb nb nb nb
.9500m .9500 nb
1Month = 1,634.21 pph nb nb nb
Gallons per Month = 1634..33 x 24 x 30 = 141, 252.24 gallons per month
nb nb nb nb nb nb nb nb nb nb nb nb nb nb nb nb
Chemical needed = 141,252.24 gallon / 600 gallon = 235, 40 gallon
nb nb nb nb nb nb nb nb nb nb nb
Cost per month = 235, 40 gallon x 8.75 = $2,059.75
nb nb nb nb nb nb nb nb nb nb
19. During a 24 hours operation how often should you check t n b n b n b n b n b n b n b n b n b n b
he water level?- n b n b
: once per shift
nb nb nb
20. How often do you check the high limit switch?: Annually nb nb nb nb nb nb nb nb nb
21. What is the recommended time for a complete external n b n b n b n b n b n b n b n b n b
inspection of a boiler?: once per shift n b n b n b nb nb nb
22. What is the first thing to do when shutting down a boiler?: To tur nb nb nb nb nb nb nb nb nb nb nb nb nb
n ott the fire nb nb nb
23. A flow control should be blown down when?: once per shift
nb nb nb nb nb nb nb nb nb nb
3nb/
nb31
, DC 3rd Class Test
nb nb nb
Study online at https://quizlet.com/
nb nb nb
24. _iqudw2
How often should
nb nb nb you check the Low Water Fuel Cut off?: once p
nb nb nb nb nb nb nb nb nb
er shift nb
4nb/
nb31
