Driver/operator needs to know the amount of friction loss and pressure loss in the fire hose in order to:
A. minimize wear and tear on fire hose
B. effectively provide water for fire streams
C. ensure correct choice of nozzle size and shape
D> control the amount of water flowing from the hyd...
Pump Ops: Chapter VII || Already Graded A+.
Driver/operator needs to know the amount of friction loss and pressure loss in the fire hose in order to:
A. minimize wear and tear on fire hose
B. effectively provide water for fire streams
C. ensure correct choice of nozzle size and shape
D> control the amount of water flowing from the hydrant correct answers B
The calculations of friction loss must take into account the:
A. size of the pump
B. length and diameter of the hoseline
C. number of personnel operating the hoseline
D. temperature of the water as it leaves the hydrant correct answers B
The combination of friction loss, elevation pressure loss, and loss associated with appliances is referred to as:
A. total pressure loss
B. primary friction loss
C. elevation friction loss
D. cumulative friction loss correct answers A
What are the two ways of determining friction loss?
A. performing tests and estimates
B. calculation and performing tests
C. manufacturers guidelines. and estimation
D. manufacturers guidelines and calculations correct answers B
Which of the following is the formula for determine friction loss?
A. FL = 0.5H
B. FL = C x Q^2 x L
C. FL = 29.7 x D^2
D. FL = gpm / 100 correct answers B
When jurisdictions perform their own tests for friction loss coefficients, testing should be conducted using:
A. older hose that has been taken out of service
B. any size and/or type of hose that is readily available
C. hose specifically set aside for use only during testing
D. actual hose that will be used during firefighting operations correct answers D
When determine friction loss coefficients, departments should test:
A. only one type of hose at a time
B. no more than two types of hose at one time
C. no more than three types of hose at one time
D. as many types of hoses as need to be tested at one time correct answers A When testing for friction loss coefficients, departments that use a pitot tube should use:
A. any nozzle
B. a fog nozzle
C. a smoothbore nozzle
D. a straight stream nozzle correct answers C
When testing for friction loss coefficients, departments that use a flowmeter should use:
A. a fog nozzle
B. any type of nozzle
C. a smoothbore nozzle
D. a straight stream nozzle correct answers B
According to IFSTA Pumping Apparatus Driver/Operator Handbook, it is assumed that there is a
0 psi loss for flows less than:
A. 250 gpm
B. 350 gpm
C. 450 gpm
D. 550 gpm correct answers B
According to IFSTA Pumping Apparatus Driver/Operator Handbook, what loss can be assumed for each appliance, other than master stream devices, in a hose assembly when flowing 350 gpm or greater?
A. 0 psi
B. 10 psi
C. 25 psi
D. 35 psi correct answers B
According to IFSTA Pumping Apparatus Driver/Operator Handbook, what loss can be assumed for all master stream appliances, regardless of the flow that will be used?
A. 0 psi
B. 10 psi
C. 25 psi
D. 35 psi correct answers C
Which of the following statements about friction loss for handline nozzles is MOST accurate?
A. it can be assumed to be 10 psi
B. it can be assumed to be 25 psi
C. it is a very significant factor in pressure loss and must be taken into account
D. it is vernally insignificant in the overall pressure loss of a hose assembly correct answers D
Elevation pressure is creates by elevation difference between:
A. hose and pump
B. nozzle and hose
C. hose and hydrant
D. nozzle and pump correct answers D
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