Pump Ops 54 Additional Questions Flashcards
Flow pressure from a hydrate is measured using a?
Pito Tube
The three methods of moving water in a water supply system include Direct Pumping, Gravity and___?
Combination
The purpose of positive pressure ventilation is to?
Create greater pressure inside a building than outside the building
Nozzles with flows excess of __ are not recommended for handlines?
350 gpm
A Sodium fire is what class?
Class “D”
When forcing open a sectional overhead door less damage will occur and more time will be saved if?
Panel is removed and a latch is turned from the inside
To break tempered plate glass doors firefighter should use ____ at the bottom corner using a shield?
The pike end of a pike headed axe
The transfer of heat energy from liquid or gas to solid surface is referred to as?
Convection
The best place to begin a pre-incident survey of a building is the?
Exterior
To be an effective cooling agent water streams need to be applied so they form a?
Protective water film on the exposed surface
When performing a search on a fire floor the firefighter should?
Start as close to the fire as possible and towards the entrance door
Smoke that indicates a backdraft or smoke explosion condition is?
Black smoke becoming dense grey-Yellow
Which is the primary advantage of a forward hose lay?
The pumper can remain at the incident scene so that the hose, equipment and tools are readily accessible.
The greatest disadvantage to using forced ventilation is that?
The fire may intensify and spread
The contents of the room simultaneously reach their ignition temperature
The current recognize capacities for pumpers increases from 750-2000gpm in what increments?
The current recognize capacities for pumpers increases from 750-2000gpm in what increments?
250gpm
Which is the first part of the impeller that receives water from the intake side of a centrifugal pump?
Eye
When pumping from a hydrant, hookup gauge on the pump panel indicates residual pressure?
Master Intake
The maximum amount of vacuum at most pumps will develop is approximately?
22” mercury
The injector plunger in a diesel engine id lubricated by?
Fuel
Which type of pumper compensates for wear and is most efficient at pumping air?
Rotary Vane
Assuming the terrain is level what is the recommended pressure for pumpers in a constant pressure relay?
175 psi
The discharge gpm in pressure comparison on a two stage pump in the pressure mode operating at 150psi is such that the?
GPM goes down as the PSI goes up
A centrifugal pump must be equipped with a relief valve or pressure governor because when the flow of water is stopped?
The pressure output of the pump will tend to increase
Most primers use and oil supply, the vent in the oil line from the reservoir to the primer pump?
Breaks the siphon of the oil into the pump after use
When priming a multi-stage pump the transfer valve should be in the _____ position in order to prevent air from being trapped inside the pump?
Volume
When the impeller speed is doubled on a centrifugal pump the pressure will?
Will increase four times if all factors remain constant
The two basic types of flow meters sensors used by the fire service are the spring probe and the?
Paddle Wheel (DO pg 252)
Cavitation most often occurs?
During drafting operations
The top surface of a piston is called?
Head
The purpose of the ignition coil in a gasoline engine is to step up the 12volts from the battery to approximately?
20,000 volts needed to jump the gap in the spark plug
Pumpers that are in-service should be tested at least _____ to determine there condition?
Annually
The shaft that supports loads may support braking and is that upon which the wheel rotates is referred to as?
Dead axle
The maximum pre-glow time for an AC fast heat glow plug in a diesel engine is __ seconds?
7
Most fire apparatus use an AC self retecifing generator, generally referred to as?
Alternator
Which is a positive displacement pump?
Priming Pump
In a rotary gear pump one gear is designated as the driving gear, and the other gear is referred as the?
Driven gear
Which device controls pressure by opening a by-pass between the discharge and suction side of the pump?
Relief valve
The heart of a centrifugal pump is a rotating disk called?
Impeller
If the fire pump operates at a discharge pressure higher than ____psi volume capability of the pump is reduced proportionally?
150
During operations of the pumper from draft the most common type of contamination to the pump involves the intake of?
Sand
The volute in a centrifugal pump enables the water to?
Build pressure before leaving the pump
Using two full twists in a soft sleeve hose between the hydrate and the pumper?
Prevents the formation of kinks in the hose
At 212°F water converts into steam, exspandes approxiatly ___ times its orginal volume?
1,700
At sea level the atmosphere exhausted a pressure of?
14.7psi
The difference in pressure in a hoseline between a nozzle and a pumper is a good example of?
Friction Loss
The force of water discharging from nozzle causes a counter force knows as?
Nozzle Reaction
What is the usually minimum flow in gallons per minute, which is considered to be a master stream?
350
What does PSIG mean?
Pounds Per Square Inch Gauge
The weight of one cubic foot of ordinary fresh water is most nearly?
62.5 pounds
Head pressure is away to describe which caretific of a water supply?
Height of a water supply above the discharge orifice
A hydrant drain hole is located just?
Above the main valve in a dry barrel hydrant
When the attack lines are shut down in a relay pumping situation, the attack pumper operator must?
Open the dump line and take the pump out of gear
1 foot of water over an area of one acker provides a water supply of 1,000 gallons per miniute for how many hours?
5 hours
