Pumps Chapter 7 Flashcards
From the Pump Manual
What capacity range do DCFD’s Hale pumps have?
1250gpm’s to 1500gpm’s
From the Pump Manual
Are the Hale pumps on DCFD’s pumping apparatus positive displacement or non-positive displacement pumps?
Non-postive displacement pumsp
From the Pump Manual
What three factors regulate performance of a centrifugal pump?
Speed(RPM), Pressure and Flow
From the Pump Manual
What are the two moving parts of a centrifugal pump?
Impeller and shaft
From the Pump Manual
The impeller is driven by a shaft wich is powered from the apparatus engine by a ____ ratio.
2:1 Ratio
From the Pump Manual
What do clearance rings do?
prevent water that is pressurized and leaving the pump from entering the impeller again
From the Pump Manual
The __ __ __ would be the recommended method the relieve the head from the pump housing.
Fill Tank Valve
From the Pump Manual
What are two ways to protect the impeller from damage?
Do not allow water in the pump to overheat, prevent foreign matter from entering the pump
From the Pump Manual
At 100psi how many drops per minute is from the packing glands is normal?
10-20 drops per minute
From the Pump Manual
What is the primary difference between single stage and two stage pumps?
single stage pump has one Impeller and two stage pump has tow impellers and a transfer valve
From the Pump Manual
On a hale pump, how can you can check that the transfer case is in the pump positon?
PTO light activating and the speedometer reading 10-15mph
From the Pump Manual
With what should a strainer be lowered into the water with?
Rope
From the Pump Manual
Maxium ammount of time the primping pump will be actuated?
45 seconds
From the Pump Manual
When drafting, and after priming, the throttle shall be set to?
1300RPMs
From the Pump Manual
When drafting, after priming, the discharege pressure should be set to
50psi
From the Pump Manual
On Hale Pumps, how long should you wait when shifting from neutral to pump position when operating the PTO?
3-5 seconds
From the Pump Manual
If pumping over _____ psi, you must open discharge gate and increase relieve valve setting.
160psi
From the Pump Manual
If the pump is attempted to be engaged before the vehicle is completely stopped, this could cause the pump to not actually engange. True or false?
True- also air leaks, insufficienet air and transmission not in neutral
From the Pump Manual
What oil is used if the pump loses prime due to no lubricant in the priming lubricant tank?
30SAE oil
From the Pump Manual
TRUE or FALSE: The single stage pump is as efficient as the two stage pump
True
From the Pump Manual
What type of lubricant is used in the priming pump?
30 weight SAE oil
From the Pump Manual
Do not continue to run the priming pump in excess of ___ seconds.
45
From the Pump Manual
What two types of relief valves are used on Hale pumps?
standard relief valve system and TPM(Total Pressure Master) relief valve
From the Pump Manual
What does the flashing pilot light on the panel mean?
The TPM external dump valve has opened
From the Pump Manual
If the pilot light on the panel comes on, is the internal relief valve open or closed?
Open
From the Pump Manual
When the pump is “Primed”, what should be done next?
open discharge gate slowly
From the Pump Manual
When should you cut-off the priming pump?
when pressure steadies
From the Pump Manual
When shutting down , how long should you wait when shifting from neutral to the road position?
5 seconds
From the Pump Manual
When pumping and operating from a hydrant, you should throttle until desired pump pressure is reached. Don not reduce intake below ____.
5 PSI
From the Pump Manual
What is the suggested correction for insufficient air in the system?
Repeat shift procedure
From the Pump Manual
What is the suggested correction for an air leak in the system?
Notify Fleet Maintenance
From the Pump Manual
What is the suggested correction for pump packings that are out of adjustment or worn?
Check the number of drips from packings (10-20)