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MWS - Mobile Water Supply: Questions & Answers
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MWS - Mobile Water Supply: Questions & Answers
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MWS - Mobile Water Supply: Questions & AnswersHow many areas do inspect during a walkaround? Right Ans - 8
Within how many seconds must air brakes be operational after engine start
up? Right Ans - 60 seconds
What are the three weekly MWS inspections? Right Ans - pump/intake
strainer
pump gearbox/packing glands
rapid dump system
What is a pre-service test? Right Ans - tests that are performed by
manufacturer before placed into service
What are the 4 pre-service tests? Right Ans - manufacturers road test
purchase acceptance test
hydrostatic test
independent pump cert test
Manufacturers road test: Right Ans - measures acceleration, top speed,
stopping ability
Purchase acceptance test: Right Ans - performed by customer and
manufacturers
repeats road test and pump cert test
Hydrostatic test Right Ans - determines wether the pump and pump piping
will hold up to the pressures in fire ground operation
certified by pump manufacturer
Independent pump cert test Right Ans - performed by independent testing
org
must comply with NFPA 1901
How often should fire pump test be conducted? Right Ans - once a year
What’s the purpose of inspection reports? Right Ans - replacement
insurance
, data references
Three sources of water that can be used for fire fighting: Right Ans -
internal/onboard tanks
pressurized sources
static sources
What is pressurized sources of water? Right Ans - under pressure before
they enter fire pump
hydrants are one exampled
What are static water sources? Right Ans - are not under pressure
( atmospheric or gravitational)
natural or man made sources
What is drafting? Right Ans - process of getting water from a static source
to an MWS internal water tank
Three main factors to consider when selecting drafting site: Right Ans -
amount of water available
type of water
accessibility of water
Normal operating pressure: Right Ans - operating pressure without any
hydrants flowing
Flow pressure: Right Ans - forward velocity of water at the discharge point
Atmospheric pressure: Right Ans - pressure that the atmosphere exerts on
earth
atmospheric pressure decreases as altitude increases
Residual pressure: Right Ans - water pressure that's still available when a
hydrant is flowing
static pressure: Right Ans - available pressure at a discharge point without
water flowing
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