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Engineers Exam > Hydralics > Flashcards

Hydralics Flashcards

0
Q

Area of rectangle

A

Length x Width

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1
Q

Area of square

A

Side x Side

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2
Q

Area of triangle

A 
     2
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3
Q

Area of a circle

A

.7854 x Diameter

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4
Q

Volume of a square

A

Side x Side x Side

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5
Q

Volume of a rectangle

A

Length x Width x Height

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6
Q

Volume of a triangle

A 
               2
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7
Q

Volume of a circle

A

.7854 x Diameter x Height

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8
Q

One falling of water = ? Pounds

A

8.3 pounds

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9
Q

One Gallon of water = ? Cubic inches

A

231 cubic inches

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10
Q

One foot = ? Inches

A

12 inches

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11
Q

One square foot = ? Square inches

A

144 square inches

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12
Q

One cubic foot = ? Cubic inches

A

1728 cubic inches

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13
Q

One cubic foot of water = ? Gallons

A

7.5 gallons

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14
Q

One cubic foot of water = ? Pounds

A

62.5 pounds

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15
Q

One ton = ? Pounds

A

2000 pounds

16
Q

Define Elevation Pressure

A

Pump pressure adjustment due to elevation gain or loss

17
Q

Finding pressures where height is known

A

Pressure = .434 x height (in feet)

18
Q

Finding height where pressure is known

A

Height = 2.3 x pressure

19
Q

Field calculation

Elevation Pressure?

A

Elevation pressure=1/2 pound per foot

Elevation pressure=5 pounds x # of floors (stories) - 1 floor

20
Q

Define static pressure

A

Intake pressure of water when no water is flowing

Stored hydrant pressure

21
Q

Define residual pressure

A

Intake pressure of water after flowing water out of pump

22
Q

Define flow pressure

A

Pressure of water when in motion or flowing from pump

23
Q

Solid stream hand lines pressure?

A

50psi (flows less than 350gmp)

24
Q

Solid stream master streams pressure?

A

80psi (flows 400 gmp or greater)

25
Q

Fog nozzle pressure

A

100 psi (regardless if gpm)

26
Q

High rise nozzle pressure?

  • fog tip?
  • solid stream?
A

Fog tip = 75psi

Solid stream = 50, 60, or 65 psi

27
Q

Formula for pump discharge pressure?

A

PDP= NP + FL + APP +- EP

28
Q

Discharge or circular openings?

A

GPM = 30 x D x ✔️P

GPM= gallons per minute
D= opening diameter in inches
30= constant
P= pressure
F= factors
29
Q

Appliances & pressure

A

Ladder =Pressure loss 40psi

Stang gun = pressure loss 15psi

Pump to pump = additional pressure 20psi

30
Q

High rise pack fog
(100’ 1 3/4” hose)

How much for each additional 50ft of hose?

A

100psi

Add 30psi each additional 50ft of hose

31
Q

High rise pack 15/16” tip 50psi NP

A

100psi

32
Q

High rise pack 15/16” tip 60psi NP

A

120psi

33
Q

High rise pack 15/16” tip 65psi NP

A

130 psi

Engineers Exam (2 decks)

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