Exam (elaborations)
DPO TEST A QUESTIONS WITH 100% CORRECT ANSWERS!!
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DPO TEST A QUESTIONS WITH 100% CORRECT ANSWERS!!
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DPO Test A1. Fire streams that deliver less than __________ GPM 350
are considered to be hand lines.
2. Using an in-line eductor, the back pressure must not 70 percent of the
exceed ________ pressure. inlet.
3. Fire streams greater that 350 GPM are considered to Master Streams.
be:
4. A test that is conducted using NFPA 1911 once a year Service/perfor-
is called a _______________ test. mance test.
5. Which best describes a dry hydrant? Found near lakes
or rivers.
6. Most fire fighting foam consists of approximately 94-99.9
_______ percent water.
7. The vacuum test requires a reading at the end of 5 10
minutes with no more than ________ inches of vacu-
um being lost.
8. Once the power take-off has been properly activated Slightly above 0
and the pump is engaged, the vehicle speedometer MPH
should show a speed of:
9. Indications of cavitation include: Rattling noise like
you're pumping
gravel.
10. A dual-pumping operation is: placing one
pumper at a hy-
drant and a sec-
ond pumper con-
nected intake to in-
take.
11. Improper tire pressure may cause: Poor handling
12.
1/8
, DPO Test A
_________ consists of a small return bypass water Around-the-pump
line connected from the discharge side of the pump proportioners
back to the intake side of the pump:
13. The nozzle reaction from a 1 1/4" tip at 50 PSI nozzle 123 LBS
pressure is approximately:
14. What is the desired pump pressure when supplying 2 137.5 PSI
lines of 2 1/2 hose, one 200' long and one 300' long,
each with a 250 GPM nozzle operating at 100 PSI?
15. The _________ enables apparatus to move and dis- Power Take Off
charge water at the same time: (PTO)
16. The purpose of an inverter on an apparatus is to trans- DC current into AC
form: current (DC-NJ)
17. Before an apparatus response from the station, the Ensure that every-
driver/operator should: one is seated and
belted.
18. When pumping to a standpipe system, a pump opera- 25 PSI
tor should allow ______ friction loss for the standpipe
system.
19. Which foam has excellent heat stability and burn back Protein foam
resistance?
20. In-line relay valves allow for: late-arriving
pumpers to hook
up without
interrupting
operations.
21. A sudden stoppage of water moving through a hose Water hammer
or pipe may result in:
22. Which is a fire hose appliance carried on a fire appa- Gated wye
ratus?
2/8
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