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principles of pressure > Measurements > Flashcards

Measurements Flashcards

Measurements

1
Q

THE VOULME OF A SQUARE OR RECTANGULAR CONTAINER IS

A

LxWxH

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2
Q

There are 7.482 gals of water in one cubic foot and one gal of water weighs 8.3lbs.

By multiplying 7.481 x 8.3 find that one cubic foot of water weighs

A

62.4lbs per cubic feet

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3
Q

THE VOLUME OF A CYLINDER IS

A

.7854x (d)sq x L

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4
Q

Maximum lift formula is

A

L= 1.13 xHg

E.g. Vacuum gauge show 15” Hg, then is 1.13×15 = 16.95’

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5
Q

TO DETERMINE THE AMOUNT OF WATER IN A CONTAINER

A

FIND THE VOLUME; IF YOUR ANSWER IS CUBIC FEET, MULTIPLE BY 7.48, IF YOUR ANSWER IS IN CUBIC INCHES DIDVIDE IT BY 231

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6
Q

What is the square root of 50 psi

A

7.07

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7
Q

square root of 75 psi

A

8.66

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8
Q

square root of 100 psi

A

10

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9
Q

square root of 80 psi

A

8.94

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10
Q

WHAT IS THE FORMULA FOR DISCHARGE OF A SMOOTHBORE NOZZLE?

A

29.7 × D2 × SQ ROOT OF NP. (What is the discharge for a handline 1.25 tip. 29.7 × 1.25 ×1.25 × 7.07=328 gpm)

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11
Q

What is the formula for figuring discharge of fog nozzle?

A

GPM= rate flow x square root of NP divide by rated flow

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12
Q

Formula for calculating nozzle reaction for smooth bore nozzles

A

1.57x(d)sq x np

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13
Q

Coefficient for 1.75

A

15.5

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14
Q

Coefficient for 2.5

A

2

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15
Q

Coefficient for 5

A

0.08

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16
Q

There are three dimensions to be considered when finding cubic volume or content.

A

Length x width x height = cubic inches

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17
Q

There are 1728 cubic inches in one cubic foot and in one gal there is 231 cubic inches,

then by dividing 1728 by 231 we find there are how many gals in a cubic foot?

A

1728/231=7.481 gals

18
Q

Smooth bore-master stream 2”tip

A

1000 GPM

19
Q

Smooth bore-master stream 1 3/4 tip

A

800 GPM

20
Q

Smooth bore-master stream 1 1/2 tip

A

600 GPM

21
Q

Smooth bore-master stream 1 3/8 tip

A

500 GPM

22
Q

Smooth bore-master stream 1 1/4 tip

A

400 GPM

23
Q

Smooth bore hand line

A

50 psi

24
Q

Smooth bore master stream

A

80 psi

25
Q

Smooth bore hand line 1 1/4 tip

A

300 GPM

26
Q

Smooth bore hand line 1 1/8 tip

A

250 GPM

27
Q

Smooth bore hand line 1 tip

A

200 GPM

28
Q

When the compound gauge reads 15” inches of vacuum,to what height will the water rise in the suction hose

A

17

29
Q

One gallon of water contains how many cubic inches

A

231 cubic inches

30
Q

One cubic foot of water contains____Cubic inchs of water

A

1728 cubic inches

31
Q

A COLUMN OF WATER ONE SQUARE INCH SQ. AND ONE FOOT HIGH WILL CREATE A PRESSURE OF

A

.434 psi

32
Q

There are three containers filled with water, The first container is one square inch at the base and 3 feet high.The second container is 3 square inches at the base and 1 foot high and The third container is 9 in.² at the base and 4 inches high. Which container has the heaviest total weight of water?

A

x

33
Q

If a circular storage tank is 12 feet in diameter and 15 feet high is 3/4 full with water and water is been removed from Tank at a rate of 500 GPM approximate how many minutes would it takes before the tank is completely empty?

A

19 mins

34
Q

Mercury is how many times as heavy as water

A

13.6

35
Q

Rounding off to the nearest hundredth determine the area of a circle whose diameter is 10 inches

A

78.50 inches

36
Q

Volume of a cylinder is

A

.7854x(d) sq x L

37
Q

How to determine the area of a circle when diameter is known

A

A= pie(3.14) x (d)sq divided by 4

38
Q

IF THE VOLUME IS IN CUBIC FEET TO CONVERT TO GALLONS

A

V=.7854 × D2 × L × 7.481

39
Q

A COLUMN OF WATER ONE FOOT HIGH EXERTS A PRESSURE OF .434 PSI THEN BY DIVIDING 1 BY .434 WE FIND THAT 1 POUND OF PRESSURE WILL RAISE A COLUMN OF WATER 2.304 FEET. IN OTHER WORDS, A COLUMN OF WATER 2.304 FEET HIGH WILL EXERT A DOWNWARD PRESSURE OF

A

1 PSI

40
Q

A pressure of 1 psi inch will rise a column of water how many feet

A

2.304 feet

41
Q

At sea level a column of mercury is

A

2.04 x 14.7= 29.9 inches

42
Q

The pressure of 1 PSI makes the column of mercury

A

2.04 inches

principles of pressure (17 decks)

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