Formulas And Euivalents Troise. Flashcards

1
Q
  1. Atmospheric pressure in feet of water head?
A

33.9 feet.

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2
Q
  1. Atmospheric pressure in inches of mercury?
A

29.9”.

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3
Q
  1. Weight of 1 cubic inch of water?
A

.0361 lbs.

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4
Q
  1. Weight of 1 cubic inch of mercury?
A

.49 lbs.

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5
Q
  1. What is specific gravity of mercury?
A

13.6 .

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6
Q
  1. Weight of 1 cubic foot of water?
A

62.4 pounds.

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7
Q
  1. Weight of 1 U.S. gallon of water?
A

8.33 pounds.

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8
Q
  1. How many gallons has1 cubic foot of water?
A

7.48 gallons.

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9
Q
  1. How many cubic inches has 1 U.S. gallon of water?
A

231 cu. in.

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10
Q
  1. What is the pressure at the bottom of a column of one foot of water?
A

.434 lb. per sq. in.

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11
Q
  1. What is the pressure in feet of pressure head at the bottom of a column of water that exert pressure 1 lb. per sq. in?
A

2.31 foot or 27.7 inches.

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12
Q
  1. How can you find pressure if you know Head ?
A

Pressure = Height (Head) x .434 for each foot high.

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13
Q
  1. How can you find head of pressure that water will rise if you water pressure?
A

Head in feet = pressure x 2.31

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14
Q
  1. Temperature of freezing of fresh water?
A

32* F.

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15
Q
  1. Temperature of freezing of salt water?
A

27*F.

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16
Q
  1. How can you find dimension of right triangle?
A
C = |** AxA + BxB
A = |** CxC - BxB
B = |** CxC - AxA.
17
Q
  1. How can you find tje diameterbofna circle that is equivalent to twongiven circles?
A
D = |** dxd - dxd
D = |** dxd + dxd.
18
Q
  1. Formila for the ratio of pipe capacities?
A

R = |**[D/d)^5, wjere

R - numbernof smaller pipes the larger one will supply.

19
Q
  1. What number has Pi?
A

22/7 or 3.1416.

20
Q
  1. Formula for circumference?
A

C = DxPi.

21
Q
  1. Formula for diameter of circumference?
A

D = C/Pi.

22
Q
  1. Formula for area of a circle?
A
A = Pi x D x D / 4.
A = .7854xDxD.
A = Pi x R x R.
23
Q
  1. Formula area of a triangle?
A

A = base x height / 2.

24
Q
  1. Volume of a cylindrical tank?
A

A = .7854x DxDxH.

25
Q
  1. Area of rectangle?
A

A = base x height.

26
Q
  1. Area of a square rectangle?
A

A = length x width.

27
Q
  1. Volume of a square or rectangle?
A

A = length x width x height.

28
Q
  1. Volum of a sphere?
A
V = 3.1416 x D x D x D / 6.
V = .5236 x D x D x D.
29
Q
  1. Volum of a hemisphere?
A

V = .2618xDxDxD.

30
Q
  1. Area of an ellipse?
A

A = .7854xDxd.

31
Q
  1. Capacity of water in a cylindrical tank in gallons?
A
C = .0034xD"xD"xH".
C = .0408xD"xD"xH'.
C = .7854/231xD"xD"xH".
32
Q
  1. Atmospheric pressure in lbs per sq in?
A

14.7 psi.