Pumps Chapter 4 pp 01-10 Flashcards
From the Pump Manual:
What do the apparatus of the DCFEMS engine company consist of?
One seperate motorized pieces of equipment consisting of a centrifugal pump, hose, tools and appliances
From the Pump Manual:
The two primary functions of the engine company are?
Supplying attack lines and devices, or used as a water supply from a hydrant to supply the fire ground engine company
From the Pump Manual:
How does the initial engine company recieve water?
By means of a supply line
From the Pump Manual:
What does the initial engine company utilize until water supply has been established?
Water in the tank
From the Pump Manual:
What are the four main steps of operation?
Making pump ready,Dotting water, Pumping, Shutting down
From the Pump Manual:
Engine companies are to be kept ready for?
Operating from booster tank
From the Pump Manual:
Relief valves should be preset at?
160 psi
From the Pump Manual:
Drain valves on intakes are to be kept?
Open
From the Pump Manual:
Drain valves on discharges are to be kept?
Closed
From the Pump Manual:
Blind caps are to be kept?
Hand tight
From the Pump Manual:
How can the pump be tested for airtightness?
By preparing it for a draft with blind caps on suction intakes
From the Pump Manual:
What is the procedure for testing the pump for airtightness using a draft?
- run priming pump until 22 inches of Mercury, 2. close priming valve, 3. stop engine
From the Pump Manual:
How long will a pump in good condition hold a vacum?
Several minutes
From the Pump Manual:
Where are common points of leakage?
Pump packings and discharge gates
From the Pump Manual:
What is the acceptable leakage rate when testing a pump using a hydrant?
10-20 drops per minute operating at 100 psi
From the Pump Manual:
Always open the hydrant fully to insure?
Getting the full supply of water and to insure that the drain valve of the hydrant is closed
From the Pump Manual:
The most desirable intakes to use when operating from a draft are those?
On the sides
From the Pump Manual:
The hard sleeve assembly consists of?
Sleeves, strainer and rope
From the Pump Manual:
Where must the hard sleeves be hammered?
On either side of the connections and at the pump intake
From the Pump Manual:
Why must hard sleeves be hammered?
A slight airleak may prevent getting water
From the Pump Manual:
How deep should the hard sleeve assemby be submurged?
At least 18 inches
From the Pump Manual:
What should be used to prevent the formation of whirlpools?
Baffles
From the Pump Manual:
When operating from a draft what position should the transfer valve be in?
Volume
From the Pump Manual:
What shall be determined prior to opening discharge gates?
Hydrant static pressure
From the Pump Manual:
Direct Drive refers to:
one to one gear ratio of the drive shaft to pump transmission
From the Pump Manual:
How long should it take to obtain a prime?
Less than 45 seconds
From the Pump Manual:
Why must water not be allowed to churn without any being discharged?
May result in a loss of prime
From the Pump Manual:
When should the transfer valve be in pressure position?
When supplying under 500 gpm
From the Pump Manual:
At what pressure is the relief valve preset when operating from the booster tank?
150 psi
From the Pump Manual:
At what pressure is the relief valve preset when operating from the booster tank?
125 psi
From the Pump Manual:
How are drain valves on gated siamese/trimese to be carried?
In the open position
From the Pump Manual:
What is the most convinient way to prevent the pump from overheating?
Open tank fill valve or drain valve on discharge gate
From the Pump Manual:
What does the suction gauge show?
Hydrant or intake pressure
From the Pump Manual:
How is static pressure obtained?
Reading the suction gauge after the hydrant has been opened but before water is discharged
From the Pump Manual:
How is residual pressure obtained?
Reading the suction gauge after the gate is opened and desired pressure is obtained
From the Pump Manual:
How is pressure drop determined?
subtracting the residual pressure from static pressure (PD=SP-RP)
From the Pump Manual:
How is the percentage drop calculated?
By dividing the drop in intake pressure by the static pressure
From the Pump Manual:
At what percentage drops can three times the amount of water be flown?
<10%
From the Pump Manual:
At what percentage drops can two times the amount of water be flown?
> 10%-15%<
From the Pump Manual:
At what percentage drops can an additional amount of water be flown?
> 15%-25%<
From the Pump Manual:
What is the minimum amount of pressure required in the soft sleeve?
5 psi
