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DPO FULL REVIEW (QUESTIONS & ANSWERS) 2024 RATED 100% CORRECT!!
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DPO FULL REVIEW (QUESTIONS & ANSWERS) 2024 RATED 100% CORRECT!!
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DPO Full Review1. Using the coefficient method, determine the friction Q = 266, so 13.5
loss in the hose assembly for two - 3-inch lines with for the Siamese,
2-1/2 couplings, 1000ft long, attached to a Siamese 40.5 for the 2-1/2,
then 300ft of 2-1/2 flowing a smoothbore handline appliance doesn't
1-1/8" tip @50 psi. factor in because
less than 350
GPM. FL = 54
2. Using the hand method what is the pump discharge PDP = 150
pressure for supplying 400ft of 2-1/2" with a fog nozzle
flowing 250 GPM?
3. Apparatus with on board tanks larger than 500 gallons 500 GPM
must provide a minimum flow rate of what? (tank-to-pump)
4. Which type of primer uses the venturi principle as part exhaust primer
of its orientation?
5. What is something a centrifugal pump with take ad- Positive intake
vantage of? pressures (hy-
drants, nurse
feeds, relays)
6. During extended periods of time, you notice an in- open the auxiliary
crease in engine temperature. What is one thing you cooling valve
can do to reduce that? (Other than circulating water)
7. How much is the collapse zone? one and a half
times the building
height
8. Where is the best place to position if possible to re- building corners
duce collapse risk?
9. If a fire pump has more than one impeller, each im- stage
peller in a housing makes up a _________.
10. In a water distribution grid, what supplies individual distributors
hydrants?
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, DPO Full Review
11. When calculating time for a tanker shuttle, the timer When the dump
starts when? valve is open
12. You time a complete tanker shuttle cycle until when? Until the tanker
comes to dump
again
13. When doing a relay operation, which truck should be The truck with the
nearest the source? largest capacity
14. When using an in-line educator, the back pressure 70% of inlet pres-
must not exceed _______. sure
15. These systems are controlled by monitoring the water Variable flow, vari-
flow and controlling the speed of a positive displace- able rate direct in-
ment foam concentrate pump. jection system
16. Liquids that are lighter than water and have a tenden- less than 1
cy to "float" have a specific gravity of?
17. What is a feature of a wet barrel hydrant? Does not re-
quire drainage af-
ter uses
18. The spiral chamber of a centrifugal pump where the volute
velocity of water is converted to pressure is what?
19. The actual maximum height water will be raised when 10.17 feet
the intake gauge readings 9 inches of mercury is?
20. What is the flow from a 2 inch smoothbore nozzle at 1062
"ideal" discharge pressure?
21. A type of foam system that consists of a return line around the pump
from the discharge side of the pump back to the intake proportioner
side is what?
22. What is a common problem when evaluating a static accessibility
water source for drafting?
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