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Hydraulic Manuel > Questions > Flashcards

Questions Flashcards

1
Q

How many inches does one cubic foot contain?

A

1728

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2
Q

How many gallons does a one cubic foot contain?

A

7.5 gallons

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3
Q

1 cubic foot of fresh water weighs how many pounds?

A

62.5 pounds

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4
Q

1 gallon contains how many cubic inches?

A

231 inches

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5
Q

How many pounds does 1 gallon of freshwater weigh?

A

8.33 pounds

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6
Q

A column of water one foot high exerts a pressure of _____ psi at it’s base?

A

0.434

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7
Q

50 ft length of 1.75 hose contains how many gallons of water?

A

6.24 gallons

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8
Q

50 ft length of 1.88 hose contains how many gallons of water?

A

7.20

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9
Q

50 ft length of 2 and 1/2 in hose contains how many gallons?

A

12.74

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10
Q

50 ft length of 3-in hose contains how many gallons?

A

18.35

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11
Q

100 ft of 4 in hose contains how many gallons?

A

65.25

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12
Q

100 ft length of 5-in hose contains how many gallons of water?

A

101.94 gallons

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13
Q

Nozzle pressure for hand lines with smooth bore nozzles is _____ PSI

A

50

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14
Q

Nozzle pressure for master streams with smooth or nozzles is _______ PSI but can be increased to _______to achieve higher flow rates?

A

80 psi

100

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15
Q

Akron assault nozzles are designed for _____ PSI nozzle pressure and flows _____ GPM with the fog nozzle and ______ Gpm with the 15/16 slug?

A

50 psi nozzle pressure
175 GPM with fog nozzle
185 GPM with the slug

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16
Q

This type of pump takes advantage of incoming pressure water enters the eye of the pump then travels through one or more impellers?

A

Centrifugal pump

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17
Q

Actual velocity pressure of the water (measured in PSI) for an individual hose line?

A

Discharge Pressure

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18
Q

The quantity of water issuing from an opening expressed in GPMs?

A

Discharge

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19
Q

Small positive displacement pump used to evacuate air from a centrifugal pump housing allowing the pump to receive water is called?

A

Primer pump

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20
Q

A stream flowing 350 gpms or more?

A

Master stream

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21
Q

What is the procedure when squaring any number that ends in .5?

A

Identify the two whole numbers at the half number is in between then
Multiply the two numbers together
Add .25 to that

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22
Q

What is the formula for rectangular shaped containers?

A

L X W X D X 7.5
(NUMBER OF GALLONS IN A CUBIC FOOT OF WATER)

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23
Q

What is the formula to determine the volume of a cylinder pipe or hose in gallons?

A

Capacity and gallons equals
n x r² x H (or L’) x 7.5 gallons
Where n Pi = 3.14
R= radius or 1/2 of the diameter in feet
H= average height/depth in feet
7.5= number of gallons per cubic foot

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24
Q

What is the formula for computing smooth bore nozzle discharge for gallons per minute when the nozzle pressure is known?

A

GPMs= 29.7 x d² x √NP

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25
Q

What is the gpm for a handline at 50 psi 1/2 inch tip?
(Fireground)

A

50 gpm

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26
Q

How many gpm does a 7/8 inch tip flow on a handline at 50 psi?
(Fireground)

A

150 gpm

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27
Q

A 1 inch tip size for a handline at 50 psi flows how many gpm?
(Fireground)

A

200

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28
Q

What is the theoretical gpm for a 7/8 tip size handline at 50 psi?

A

161 gpm

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29
Q

What is the theoretical gallons per minute for a 1-in tip size handline at 50 psi?

A

210 gpm

30
Q

How many gallons per minute does an 1 1/4 flow theoretical master stream at 80 psi?

A

415 gpm

31
Q

How many gallons per minute does a 1 3/8 tip flow master stream at 80 psi?
(Theoretical)

A

502 gpm

32
Q

What is the theoretical GPM for 1 1/2 tip master stream at 80 psi?

A

598 GPM

33
Q

What is the theoretical gpms for a master stream at 80 psi and a 1 3/4 tip?

A

814 gpm

34
Q

What is the theoretical GPM for a 2-inch tip on a master stream at 80 PSI?

A

1062 gpm

35
Q

The one inch adjustable gallonage fog nozzle is an adjustable flow nozzle that can be set to deliver _______ - ________ gpm?

A

12-60 gpm

36
Q

The one and a half inch Akron assault nozzle flows how many gallons?

A

175 gpm

37
Q

The two and a half inch Akron fog nozzle is an adjustable flow nozzle that can be set to deliver ______ - ________ gpm?

A

125-250 gpm

38
Q

Master stream fog nozzles have an operating range of ______ to _____ gpm?

A

150-2000 gpm

39
Q

What is the nozzle pressure for a booster reel 1 inch rubber line with an adjustable gallonage fog nozzle that can flow between 12 to 60 gpm?

A

100 psi

40
Q

What is the PSI for forestry hose that comes in 50 and 100 ft sections with a 1 in adjustable gallonage fog nozzle that can flow between 12 to 60 gpms or the 22 gallon per minute red fog nozzle?

A

100 psi

41
Q

At what PSI and gallons per minute does the d-CON shower flow?

A

75 psi
270 gpm

42
Q

How many gallons per minute and at what PSI can you flow a piercing nozzle?

A

100 psi
125 gpm

43
Q

How many gallons a minute and at what PSI is the 2 1/2 inch distributor nozzle flow?

A

250 gpm
100 psi

44
Q

How many gallons per minute at 50 psi does the 1 1/2 inch distributor nozzle flow?

A

95 gpm
50 psi

45
Q

How many gallons per minute and PSI does a 21/2 inch cellar nozzle flow?

A

350 gpm
100 psi

46
Q

How many gallons per minute and at what PSI does a 11/2 inch cellar nozzle flow?

A

160 gpm
100 psi

47
Q

What are the three different types of monitors used in Fairfax county?

A

Fix monitors
Combination monitors
Akron quick attack Mercury monitor

48
Q

Smooth bore nozzle flowing between 500-1000 GPM at 80 psi nozzle pressure is an example of what type of monitor?

A

Combination

49
Q

A fog nozzle flowing between 350-1,250 GPM at 100 PSI nozzle pressure is an example of what type of monitor?

A

Combination

50
Q

Smooth bore nozzle flowing between 500 and 1000 GPM is an example of what type of monitor?

A

Fixed monitor

51
Q

What flows 500 gallons per minute from either the fog or smooth or nozzle?

A

Akron quick attack Mercury monitor

52
Q

What is the maximum inlet pressure for the Mercury monitor?

A

150 psi

53
Q

How many principles govern friction loss and hose and piping?

A

4

54
Q

What is the friction loss coefficient for 3 1/2 in hose?

A

0.34

55
Q

What is the friction loss coefficient for 1 in hose?

A

150

56
Q

What is the formula to figure elevation pressure theoretical?

A

H x 0.434 psi/foot

57
Q

Fairfax county portable foam eductor’s flow 95 to ______ GPM with a discharge pressure of _____ PSI at the eductor?

A

125 gpm
200 psi

58
Q

Portable foam eductor must be placed ______ feet from the pump panel and within ______ feet of the nozzle?

A

50 feet
200 feet

59
Q

The nozzle should be no higher than _______ feet above the eductor?

A

5 feet

60
Q

When being supplied from another source the tank fill valve must be kept in the closed position during operation to prevent the water tank from becoming contaminated with concentrate the intake pressure should not exceed _______ PSI? (Foam)

A

10

61
Q

The husky foam system is capable of injecting foam from 0.1 to 3% with a rated capacity of ______ GPM of foam concentrate at _____ psi?

A

3 gpm
150 psi

62
Q

What does the application consist of for CAFS fire attack?

A

2/3 water and 1/3 air with a foam application rate of 0.3%

63
Q

What is the application for CAFS overhaul and exposure protection?

A

2/3 air 1/3 water with a class A foam application rate of 0.5%

64
Q

To maintain the maximum flow from a pressurized water source such as a fire hydrant add the incoming static pressure to _______ PSI?

A

150

65
Q

What is the friction loss coefficient for two 3-in lines?

A

0.2

66
Q

What is the friction loss coefficient for two 4-in lines?

A

0.05

67
Q

What is the friction loss coefficient for one 4 inch line and one 3 inch line?

A

0.09

68
Q

When drafting put your pressure Governor to _______mode and increase throttle to _____ to _____ RPM?

A

Rpm mode
1000 to 1200 rpm

69
Q

What is the formula for determining smooth bore nozzle reaction?

A

1.57 x d² x NP

70
Q

What is the formula for a fog stream nozzle reaction?

A

.0505 x Q x √NP

71
Q

Any time incoming pressure exceeds _____ PSI the pump shall be operated in pump gear?

A

50 psi

Hydraulic Manuel (1 decks)

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