Pump Study Guide Flashcards
Pass the Test (84 cards)
1
Q
Improper use or poor maintenance can result in what 3 thing?
A
- Unneccessary property damage
- Injury damage to equipment itself
- Needless loss of life
2
Q
What fire engine pump is presently used in the NHFD
A
Centrifugal pump
3
Q
What are the 2 main parts of a centrifugal pump
A
- Impellars
2. Volutes
4
Q
What part of the centrifugal pump rotate very rapidly with the volute and creates centrifugal force which hurls the water from the center outward
A
Impeller
5
Q
What part of the centrifugal pump is a spiral shaped section of the body enclosing each impeller, which than carries water from the impeller, which than carries water from the impeller to the discharge?
A
Volute
6
Q
What forces water into the suction eye
A
Atmospheric or other pressures
7
Q
What do the impellers to with the water
A
Forces the water outward
8
Q
What do the volutes do with the water
A
Conducts the water out
9
Q
What are the 3 things that can regulate pump discharge pressure
A
- Adjusting pump speed
- Adjusting discharge valve openings
- Nozzle Size
10
Q
What is the heart of the centrifugal pump
A
Impellers
11
Q
What is the size of the slots in the impellers
A
1/2 inch wide by 2 inches long
12
Q
What do centrifugal pumps do with hydrant pressure
A
It adds to the pressure
13
Q
What is the function of a positive displacement pump
A
It provides all the pressure
14
Q
What does a centrifugal pump need to exceed its rated capacity
A
a good hydrant
15
Q
What is the pump of choice for the NHFD
A
Single stage centrifugal pump
16
Q
What is the preferred pump capacity of the NHFD
A
1250 GPM waterous pump mid mounted
17
Q
What is Engine 16s capacity
A
1000 GPM waters pump
18
Q
What is Engine 5s capacity
A
1500 GPM
19
Q
What is the output of a single staged pump, both volume and pressure, controlled by?
A
Engine throttle Setting
20
Q
What takes the engine out of its road or driving sequence and directs its power to the pump
A
pump transmission
21
Q
What are the 7 steps to engage the fire pump on the apparatus
A
- Stop apparatus
- Set Parking brake
- Reduce Engine to idle speed
- Place road transmission to neutral
- Move pump shift to center (pause) then pump position. Green light should go on
- road transmission into drive
- Chock wheels
22
Q
What will the speedometer register at when the pump is engaged
A
5-20mph
23
Q
How do you use the manual electric pump override for pump gear and road gear
A
Push rod in for road gear
Pull out for pump
Pull rod out for road gear
24
Q
How many seconds do you want to wait from setting the manual rod from road gear to engaging the transmission
A
4 seconds
25
What is an essential part of the fire pump equipment
Pressure relief valve
26
What is the basic purpose of the pressure relief valve
To protect FF handling hoselines against undue pressure rises in the line
27
What can cause serious injuries to nozzle personnel, cause burst hoselines and mechanical damage
Increased discharge pressure due to attack lines shutting down
28
What type of valve actuates the relief valve to bypass water from discharge to intake of pumps
Adjustable spring loaded pilot valve
29
What are the 8 steps to setting the pressure relief valve
1. Set discharge lines to desired pressures
2. Turn pressure relief to on position
3. Note engine pressure (main pressure gauge) and engine speed (RPM) 4. Rotate relief valve in counter clockwise until:
- Amber light goes on
- A decrease in pump pressue occurs along with decrease in pump speed 5. Rotate relief valve clockwise until amber light turns green
6. Pressure relief is set
7. If additional lines are added, throttle must be adjusted
8. If greater engine pressure is required, the following must be done:
- Rotate relief valve clockwise and increase throttle
30
Before a centrifugal pump can operate, what must be done?
It must be primed
31
What is replacing air in the intake lines and portion of pump with water?
Priming
32
What is an eccentric rotary vane pump
priming device
33
When drafting, we are making the engine a what type of pump?
positive displacement pump
34
What are the 3 components of a waterous priming system?
1. Positive displacement pump
2. Priming Valves
3. Priming Tank
35
What are the 5 things the cooling system consists of?
1. Centrifugal type circulating pump
2. Radiator of vertical tubes, horizontal fine type
3. Fan which draws air through radiator as means of dissipating heat from motor
4. Auxiliary cooler (Heat exchanger)
5. Strainer installed under cab floor which strains water coming from pump to prevent clogging
36
What controls the temperature of coolant in apparatus engine during pumping operations?
Auxiliary cooler
37
What type of auxiliary cooler does the NHFD use
Immersion type auxiliary cooler
38
Who is charged with the responsibility of maintaining a high standard of efficiency and team work among their personnel under their command?
Company Officer
39
What 3 things will the pumping principles and procedures give company officers the assistance to do?
1. Conduct drills in quarters
2. Supervising the proper case and maintenance of pumps
3. Selecting personnel to qualify as pump operators
40
What cannot be accomplished unless the operator has through knowledge of his equipment, and knows how to get the max performance out of the pump?
Smooth Fireground ops
41
What develops on the part of the operator at large fires where the operator has a combo of problems that he/she has not previously encountered?
fumbling
42
What are the 4 circumstances that result in failure on the part of the pump operator to adjust their pumping?
1. Endangering the safety of fellow firefighers and occupants
2. Making control of the fire more difficult
3. Permitting the fire to reach more serious proportions
4. Costly repair to apparatus
43
What are the 4 methods in which water is introduced to the intake side of the pump?
1. Gravity pressure from booster tank
2. Positive pressure from hydrant
3. Relay lines from another pump
4. Drafting from a source below
44
NHFD fire apparatus have a booster tank with how many gallons?
500 gallons
45
How many gallons does Engine 16 have?
750 gallons
46
How many gallons does engine 5 carry?
600 gallons
47
The operation of a pump connected to a hydrant will vary because of what 4 factors?
1. Size of hydrant and water available
2. Volume of fire encountered, which will determine the size of suction lines to be used, 3" hose or large suction
3. The # and size of hoselines that may be required for the control and extinguishement of fire
4. Capacity of pump
48
What are the 4 considerations when operating from a hydrant?
1. Suction line to be as short as possible and of sufficient diameter to handle the flow of water that is required
2. Hydrant fully opened
3. Suction hose bwtn hydrant + pump are free of kinks
4. Connections shall be made on side of pump from which control are
49
What are the 5 things an operator must observe when operating at a large fire and charging 2 1/2" and 3" lines?
1. Be certain that the hose is fully coupled to the proper discharge gate
2. Open discharge gates only when ordered
3. Reduce throttle
4. Open discharge gates slowly
5. Advance throttle gradually to desired pressure
50
What is the NFPA standard for fire apparatus/operator qualifications?
NFPA 1002
51
What should officers not have pump operators practice unless supervised at the training academy?
Drafting
52
What is the maximum lift (height difference btwn pump and water supply) of hard suction is usually no more than?
25 feet
53
As the maximum lift of the hard suction increases, the pump capacity does what?
decreases
54
There should be how many feet of water above the strainer of the hard suction?
2 feet 24 inches
55
When drafting, you must increase the RPMs to what and that should provide how many PSI of water pressure?
1000 rpms
50 psi
56
In the event the pump must draft from salt water, the pump must be thoroughly ______ and supervised by whom?
Flushed
supervisor of motor apparatus
57
What is perhaps the most important single responsibility of the pump operator?
operating the pump at proper pressures for particular hose layout
58
How many GPM for an 1 3/4" hose line and master stream?
DELETE QUESTION
| 1000gpm
59
What does too little pump pressure cause
poor fire streams
60
What does high pump pressure cause
difficult to control and direct hoselines
61
What can excessive pump pressures cause?
burst hose lines or breakdown of pumps
62
What are 5 things that can cause a failure to get a desired pressure
1. Pump transmission not in proper gear
2. Hose layouts and nozzle sizes are beyond capacity of pump to supply 3.Water supply is inadequate to supply the hose layout employed
4. Pressure relief not properly set to highest pressure
5. Control valve in gauge line may be closed
63
Which gauge is at the discharge side of the pump that registers the pressure at which the pump is discharging?
Pressure gauge
64
What is the formula the discharge pressure gauge accumulates?
- Total sum of nozzle pressure
- Plus friction loss in hoseline
- Plus pressure need to overcome elevation
- Plus any special appliances
65
What 5 things can cause a drop in the pressure gauge?
1. Booster tank is dry
2. Opening of additional lines
3. Obstruction in suction side of pump
4. Burst section of hose
5. Replacing smaller tip with large ones
66
If a sharp increase in the pressure gauge is noticed, what 2 things can be happening?
1. Nozzle was shut down
2. Tip Size changed
| 2. Nozzle tip size has been reduced
67
What is another word for flow pressure?
Residual pressure
68
What is water at rest?
Static Pressure
69
What is gauge is located on the suction side and shows the pressure under which water is being supplied to the pump?
Compound gauge
70
How many pounds of pressure on the compound gauge should a pump operator maintain at all times?
5 pounds
71
What should company officers avoid having their pumps connected to?
dead end hydrants
72
What is a good oil pressure while pumping will denote that the engine is properly lubricated?
40-60
73
What is mounted on dashboard & panel of apparatus and is for the purpose of determining what the speed of the engine is in revolution per minute?
Tachymeter
74
The heat temperature gauge on the Pierce Arrow should be in what range?
180-200 degrees
75
The heat temperature gauge on the new apparatus should be?
200-210
76
When drafting from a salt water supply, the engine temperature should be in what range?
170-195
77
What is the pump pressure for truck 1
150 lbs at the base. Don't exceed 200psi
78
What is the pump pressure a water tower (Calculate back from tip)?
- 80 psi nozzle pressure @ tip (75 psi if using SM1000X stream)
- 15 psi friction loss for appliance
- 20 psi friction loss 100' of 3" going up the ladder
- 35 psi back pressure @ 70' or 1/2 psi per foot
- Allow for friction loss in hose between siamese & pumper
79
What is the friction loss per 100 foot, nozzle pressure, GPM, and reach of an Akron 2431 pistol grip 7/8?
Smooth bore
- 40 lbs FL
- 50 lbs NP
- 160 GPM
- 50 ft reach
80
What is the friction loss per 100 foot, NP, GPM, and reach of an Elkart #4000-17 pistol grip Fog nozzle?
- 40 lbs FL
- 50 lbs NP
- 150 GPM
- 50 foot reach
81
What is the friction loss per 100 foot, NP, GPM, and reach of a 1" smooth bore?
- 10 lbs FL (1 line)
- 3 lbs FL (2 lines) - 50 lbs NP
- 250 lbs GPM
- 50 foot reach
82
What is the friction loss per 100 feet, NP, GPM, and reach of a 1 1/8" smooth bore?
- 15 lbs FL (1 line)
- 5 lbs (2 lines)
- 50 lbs NP
- 300-350 GPM
- 50 ft reach
83
What is the friction loss per 100 feet of 3" hose when flowing 2
1 3/4" handlines?
10 psi
84
A pump should deliver It’s rated capacity at what percentage of the peak speed
80%
