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Questions and Answers
When does cavitation occur in a fire pump system?
When does cavitation occur in a fire pump system?
- When attempting to flow water faster than it is being supplied to the pump (correct)
- At any speed of the apparatus
- During drafting operations only
- When the pump pressure exceeds 200 psi
What is the minimum gauge pressure required for the pump and roll apparatus to pump at least 20 gpm while moving at a speed of 2 mph or less?
What is the minimum gauge pressure required for the pump and roll apparatus to pump at least 20 gpm while moving at a speed of 2 mph or less?
- 80 psi (correct)
- 150 psi
- 50 psi
- 100 psi
According to NFPA 1901, if a pumping system is rated at 3,000 gpm or less, it should be able to deliver water at what rate at 200 psi?
According to NFPA 1901, if a pumping system is rated at 3,000 gpm or less, it should be able to deliver water at what rate at 200 psi?
- 80% of the rate capacity
- 90% of the rate capacity
- 60% of the rate capacity
- 70% of the rate capacity (correct)
When drafting, a fire pump rated at less than 1500 gpm is capable of taking suction through how many feet of suction hose?
When drafting, a fire pump rated at less than 1500 gpm is capable of taking suction through how many feet of suction hose?
What type of pumps does the fire service primarily use?
What type of pumps does the fire service primarily use?
What is the function of a positive displacement pump in relation to a centrifugal pump?
What is the function of a positive displacement pump in relation to a centrifugal pump?
What is the minimum requirement for baffling in water tanks as per NFPA 1901?
What is the minimum requirement for baffling in water tanks as per NFPA 1901?
What size should the removable pipe plugs be in cleanout sumps according to NFPA 1901?
What size should the removable pipe plugs be in cleanout sumps according to NFPA 1901?
What type of flow does a positive displacement pump produce?
What type of flow does a positive displacement pump produce?
Why are positive displacement pumps considered ideal for use as priming pumps for centrifugal pumps?
Why are positive displacement pumps considered ideal for use as priming pumps for centrifugal pumps?
In what scenarios can positive displacement pumps be used apart from priming pumps for centrifugal pumps?
In what scenarios can positive displacement pumps be used apart from priming pumps for centrifugal pumps?
What are the two types of positive displacement pumps?
What are the two types of positive displacement pumps?
What is the most common type of fire pump used today?
What is the most common type of fire pump used today?
In parallel/volume mode, what percentage of the pump's total capacity does each impeller pump?
In parallel/volume mode, what percentage of the pump's total capacity does each impeller pump?
What is the most common mode used on two-stage pumps?
What is the most common mode used on two-stage pumps?
To satisfy UL standards, what percentage of rated capacity must pumps produce at 200 psi for 10 minutes?
To satisfy UL standards, what percentage of rated capacity must pumps produce at 200 psi for 10 minutes?
What is the minimum rate at which water must be delivered to the pump if the water tank has a capacity greater than 500 gallons?
What is the minimum rate at which water must be delivered to the pump if the water tank has a capacity greater than 500 gallons?
At what pressure should each discharge outlet valve be operable?
At what pressure should each discharge outlet valve be operable?
What size outlets are provided on a pump rated at less than 750 gpm?
What size outlets are provided on a pump rated at less than 750 gpm?
When should the pressure relief system be installed on the pump system?
When should the pressure relief system be installed on the pump system?
What is the minimum requirement for the master pump intake gauge to measure?
What is the minimum requirement for the master pump intake gauge to measure?
Where must the master pump discharge gauge be located in relation to the intake gauge?
Where must the master pump discharge gauge be located in relation to the intake gauge?
What accuracy range do flowmeters generally boast?
What accuracy range do flowmeters generally boast?
What does the discharge pressure relief valve do?
What does the discharge pressure relief valve do?
What is the function of a pressure governor in a fire pump system?
What is the function of a pressure governor in a fire pump system?
Where is the simplest form of power supply found?
Where is the simplest form of power supply found?
What is the maximum pressure rise the pump system must control automatically?
What is the maximum pressure rise the pump system must control automatically?
What type of lubricant must the priming system be capable of operating with?
What type of lubricant must the priming system be capable of operating with?
How does the discharge pressure relief valve control pressure?
How does the discharge pressure relief valve control pressure?
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