Pump Manual Flashcards
(40 cards)
What should be done when making adjustments in pressure to avoid serious damage?
Adjust slowly
What is the most convenient option to prevent overheating of the pumps?
Open tank fill valve
What is the relief valve pressure pre-set at?
150psi
he transfer valve should be placed in pressure if supplying under how many gpms?
500
The D.C. Fire and EMS department when writing specifications for the purchase of pumping apparatus, requires the standard _______________hour acceptance test?
3 hour
What NFPA guideline is used for fire department hose?
NFPA 1962
While conducting the annual service test, What is the position of the discharge gates set at to either create friction loss or achieve higher pressure?
Partially close the valves
The total length of any hose to be tested shall not exceed _________________ feet and be secured at the end with a hose rope 10-15 inches behind coupling?
300
How often shall air tanks be bled?
Daily
What is the friction loss for a hydrant valve?
25psi
What is the friction loss of a ladder pipe assembly ( Siamese, 100’ 3” hose, ladder, pipe)?
50psi
What is the friction loss for a standpipe system?
25psi
What is the friction loss of a cellar pipe?
25psi
When charging a metro standpipe connection, at what psi must be used?
Hydrant pressure with two lines
Pressure is defined as?
A force divided by the area over which it is distributed
Layers of liquid move at different speeds, starting with little or no movement where the liquid is in contact with the solid boundary, and achieving greater and greater velocities toward the center of the flowing stream. This is called:
The laminar effect
This part of the centrifugal fire pump permits the water passing through the gradually enlarging area to be reduced in velocity with a corresponding increase in pressure
Volute
What is the maximum discharge pressure for single stage centrifugal pumps in the District of Columbia Fire Department?
300psi
If pumping is already in progress and it becomes necessary to change from pressure to capacity, or vice-versa, the pump pressure should be reduced to within how many psi of the pump intake pressure.
50
What is the maximum layout of dual 3-inch lines when pumping the capacity of a 1250 GPM pump?
350’
What is the maximum layout of dual 3-inch lines when pumping the capacity of a 1500 GPM pump?
250’
What is the nozzle pressure and GPM for the foam eductor in the foam position?
200psi
95gpm
When setting up for draft, how many inches must the end of the hard sleeve be submerged to prevent the formation of a whirlpool?
18
During the operation of a pumper from a hydrant the available water supply is considered as having been fully used when the intake pressure gauge drops to what PSI?
5
