1. Pressure in a water distribution system during average consumption is __________ pressure. A) residual B) mean C) normal operating D) static
C) normal operating
2
New cards
2. The NFPA recommends color-coding hydrants to indicate: A) the most recent flow test. B) available pressure. C) the water source. D) available flow.
D) available flow.
3
New cards
3. Fire fighters may need to hold on to the ________ while filling a self-expanding portable tank. A) frame B) hose C) rope D) collar
D) collar
4
New cards
4. The flow or quantity of water moving is usually measured in: A) joules. B) cubic feet per minute (cubic meters per minute). C) gallons per minute (liters per minute). D) pounds per square inch (kilopascals).
C) gallons per minute (liters per minute).
5
New cards
5. The pressure remaining in a water distribution system when water is flowing is the ________ pressure. A) static B) operating C) flow D) residual
D) residual
6
New cards
6. A dry hydrant provides access to a: A) municipal water system. B) static water source. C) portable water tank. D) cistern or well.
B) static water source.
7
New cards
7. When water is motionless, which kind of energy does it have? A) Residual B) Absolute C) Potential D) Kinetic
C) Potential
8
New cards
8. What is the decrease in pressure that occurs as water moves through a hose? A) Dynamic loss B) Residual pressure C) Water hammer D) Friction loss
D) Friction loss
9
New cards
9. What should be done to avoid water hammer? A) Always maintain a minimum residual pressure of 20 psi B) Never connect a hard suction hose to a pressurized water supply C) Purge air from the line before opening a valve or nozzle D) Open and close all valves slowly
D) Open and close all valves slowly
10
New cards
10. Which term means the properties of energy, pressure, and water flow as related to fire suppression? A) Hydrodynamics B) Friction loss C) Hydraulics D) Fire flow
C) Hydraulics
11
New cards
11. In areas of the western US where aircraft are used to fight wildland fires, which term is used for automotive water supply apparatus? A) Water truck B) Tanker C) Tender D) Tank truck
C) Tender
12
New cards
12. The pressure in a system when no water is flowing is called ________ pressure. A) static B) operating C) flow D) residual
A) static
13
New cards
13. Which is the term for the middle-size water main in a municipal water distribution system? A) Intermediate main B) Secondary feeder C) Distributor D) Trunk line
B) Secondary feeder
14
New cards
14. Which is the NFPA color code for a hydrant flowing less than 500 gpm (1893 lpm)? A) Red B) Orange C) Yellow D) White
A) Red
15
New cards
15. Portable pumps can deliver a maximum of: A) 250 gpm (946 lpm). B) 500 gpm (1893 lpm). C) 750 gpm (2839 lpm). D) 1000 gpm (3785 lpm).
B) 500 gpm (1893 lpm).
16
New cards
16. Which is a common size of hydrant outlet? A) 2½" (65 mm) B) 3" (75 mm) C) 3½" (90 mm) D) 4" (100 mm)
A) 2½" (65 mm)
17
New cards
17. What is the maximum capacity of typical portable water tanks? A) 1500 gal (5678 L) B) 2000 gal (7570 L) C) 3500 gal (13,249 L) D) 5000 gal (18,927 L)
D) 5000 gal (18,927 L)
18
New cards
18. What is the realistic minimum usable residual pressure from a water distribution system for firefighting operations? A) 0 psi (0 kPa) B) 20 psi (138 kPa) C) 30 psi (207 kPa) D) 40 psi (276 kPa)
B) 20 psi (138 kPa)
19
New cards
19. The pipes that deliver water to users and hydrants on individual streets are: A) service lines. B) secondaries. C) distributors. D) cross mains.
C) distributors.
20
New cards
20. Which type of pressure is created by the difference in height between a water source and the point of discharge? A) Elevation B) Static C) Flow D) Gravity
A) Elevation
21
New cards
21. In a well-designed water distribution system, which type of pattern do the water mains follow? A) Branched B) Parallel C) Loop D) Grid
D) Grid
22
New cards
22. How many gallons per minute can a tanker shuttle operation deliver without interruption? A) Zero B) A few hundred C) Several hundred D) A few thousand
C) Several hundred
23
New cards
23. What is the minimum recommended pressure for water coming from a fire hydrant? A) 20 psi (138 kPa) B) 30 psi (207 kPa) C) 40 psi (276 kPa) D) 50 psi (345 kPa)
A) 20 psi (138 kPa)
24
New cards
24. A Pitot gauge is used to calculate: A) pump discharge pressure. B) net pump pressure. C) static pressure. D) volume of flowing water.
D) volume of flowing water.
25
New cards
25. Which is the NFPA color code for a hydrant flowing 1500 gpm (5678 lpm) or more? A) White B) Orange C) Green D) Light blue
D) Light blue
26
New cards
26. How can you determine that a dry-barrel hydrant is still draining? A) Place a hand on the stem nut and feel for vibration B) Look for a continuing trickle from the discharge outlet C) Place a hand over an outlet and feel for suction D) Listen carefully for a hissing sound
C) Place a hand over an outlet and feel for suction
27
New cards
27. An object in motion possesses which kind of energy as a result of that motion? A) Entropic B) Kinetic C) Potential D) Inertial
B) Kinetic
28
New cards
28. Which pressure must be measured to calculate the quantity of water flowing through a hydrant discharge? A) Head B) Operating C) Flow D) Residual
D) Residual
29
New cards
29. Which pressure measurement provides the best indicator of how much more water is available in the system? A) Residual B) Static C) Normal operating D) Flow
A) Residual
30
New cards
30. Which pipe pattern supplies water to hydrants from more than one direction? A) Grid B) Engineered C) Duplex D) Parallel
A) Grid
31
New cards
31. Which is the NFPA color code for a hydrant flowing 500 to 999 gpm (1893 to 3781 lpm)? A) Red B) Orange C) Green D) Light blue
B) Orange
32
New cards
32. Where is the main valve located in a dry-barrel hydrant? A) In the riser B) Below the frost line C) In the bonnet D) At the discharge
B) Below the frost line
33
New cards
33. What is hard suction hose most commonly used for? A) Transferring water from a pressurized source to a pump B) Drafting from a static water source C) Relay pumping D) Filling a portable tank
B) Drafting from a static water source
34
New cards
34. The pipes that deliver water from the treatment facility for distribution are: A) secondaries. B) mains. C) distributors. D) trunks.
B) mains.
35
New cards
35. Where is a dump valve located? A) On a portable water tank B) At the lowest point in a water system C) On a mobile water supply apparatus D) At the end of a dead-end main
C) On a mobile water supply apparatus
36
New cards
36. Which is the fastest way for a mobile water supply apparatus to offload water into a portable tank? A) Connect to the drafting pumper B) Use the dump valve C) Use a jet siphon D) Use large-diameter hose
B) Use the dump valve
37
New cards
37. Fire hydrants should be inspected at least once every _____ months. A) 6 B) 12 C) 18 D) 24
B) 12
38
New cards
38. Which is the NFPA color code for a hydrant flowing 1000 to 1499 gpm (3785 to 5674 lpm)? A) Yellow B) Light blue C) Green D) Orange
C) Green
39
New cards
39.C) According to the NFPA, what is the minimum distance between the center of a fire hydrant outlet and the finished grade of the ground around the hydrant? A) 12" (30 cm) B) 18" (45 cm) C) 24" (60 cm) D) 30" (75 cm)
B) 18" (45 cm)
40
New cards
40. On a wet-barrel hydrant, where is the valve located? A) On each outlet B) At the base C) In the bonnet D) In the barrel
A) On each outlet
41
New cards
41. Friction loss is __________ proportional to the length of a hose. A) directly B) variably C) inversely D) indirectly
A) directly
42
New cards
42. Which term means the amount of energy in water? A) Flow B) Watts C) Volume D) Pressure
D) Pressure
43
New cards
43. A jet siphon is used for which application? A) Expediting discharge from a mobile water supply apparatus B) Exhausting air from hard suction C) Priming a dry pump D) Transferring water between portable tanks
D) Transferring water between portable tanks
44
New cards
44. In general, mobile water supply apparatus (tankers) carry __________ of water. A) 1000 or fewer gal (3785 L or fewer) B) 1000 to 3500 gal (3785 to 13,249 L) C) 2000 to 5000 gal (7570 to 18,927 L) D) 3000 to 6000 gal (11,356 to 22,712 L)
B) 1000 to 3500 gal (3785 to 13,249 L)
45
New cards
45. The quantity of water that is being moved through a pipe or hose is termed the: A) pressure. B) flow. C) throughput. D) stream.
B) flow.
46
New cards
46. How close must a fire engine get to a static water source to be able to draft directly from it through hard suction hose? A) A distance equal to the total length of the available hard suction hose minus 10 ft B) 10 ft (3 m) C) 20 ft (6 m) D) 30 ft (9 m)
C) 20 ft (6 m)
47
New cards
47. Which is one of the four factors that determine friction loss? A) Ambient temperature B) Hose diameter C) Atmospheric pressure D) Water source
B) Hose diameter
48
New cards
48. Which is the term for the large discharge opening on a fire hydrant? A) Steamer B) Deluge C) Main D) Primary
A) Steamer
49
New cards
49. Where are dry-barrel hydrants typically located? A) Static water supplies B) Cold climates C) Dedicated fire protection water systems D) Areas subject to frequent vandalism
B) Cold climates
50
New cards
50. Another term for head pressure is __________ pressure. A) static B) elevation C) flow D) residual