Quiz Questions 2 Flashcards
For drafting purposes, how is lift measured?
Q
When attack lines are used intermittently during pump operations, how does a pump operator ensure at the pump does not overheat?
How is the transition made from the water tank to the external water supply?
What nozzle reaction does a 32 mm tip with 350 kPa nozzle pressure produce?
What is the formula .067 x d² x √NP used to estimate?
What is a hydrant with the largest capacity connected to?
Primary feeder
What is the procedure to increase the efficiency of water shuttle operations?
Vacuum tenders
When water suddenly stops moving through a hose, what is the result?
Water hammer
(energy surge being transmitted in the opposite direction)
An apparatus is equipped with a 5,000 litre tank that supplies two preconnected hoselines; one flowing 600 litres per minute and the other flowing 400 litres per minute. How many minutes of agent applications are available?
While drafting and flowing water, a pump operator sees is a reading of -75 kPa on the compound gauge. What does this indicate?
If the friction loss in 90 metres of hose is 490 kPa, what is the friction loss in 135 metres of the same size hose that is flowing the same amount of water?
729 KPA
What is the friction loss in 120 metres of 65 mm hose flowing 1200 litres per minute?
221.76 KPA
In a relay pumping operation, what is the purpose of the attack pumper?
Supplying attack lines and appliances for fire suppression.
In order to prevent damage during a relay operation, which apparatus initiates shutdown?
Attack pumper
What is the last apparatus to shut down in a relay operation?
Pumper farthest from attack pumper.
What is the formula for Friction Loss (FL)?
FL= CQ 2 L
What does C stand for in the FL formula?
Coeficient
What does Q stand for in the FL formula?
GPM
What does L stand for in the FL formula?
Hose length
What is the FL coefficient for 38mm hose?
What is the FL coefficient for 45mm hose?
What is the FL coefficient for 65mm hose?
2
What is the formula to determine water flow from a smooth bore nozzle?
When the intake pressure Falls below 140 kPa during relay pumping what does that signal?
What is the principle that causes foam concentrate to move through an inline foam eductor and into the water stream?
What factors are considered When selecting a foam proportioner?
The nozzle crew indicates there is not enough foam at the nozzle how does the pump operator correct this problem?
Pump operator, using an in-line eductor, notices the phone being generated is of poor quality. What is the reason for his failure?
When pumping to an automatic standpipe system what friction loss does a pump operator allow?
What is the friction loss constant added to the discharge pressure for each the standpipe connection?
What is the hose lay that is used from the fire to the water?
Reverse lay
