Plumbing - Union Math Short Cut
To convert feet and inches into decimal feet, first convert the inches to a decimal (e.g., 6 inches = 6), then divide the inches by 12. Add the result to the feet to get the total in decimal feet.
How shall you convert feet and inches into decimal feet?
Change inches into decimal, then divide by 12.
Key Terms
How shall you convert feet and inches into decimal feet?
Change inches into decimal, then divide by 12.
How shall you convert fraction to a decimal?
Divide denominator into numerator.
How shall you convert decimal feet into feet and inches?
Multiply by 12 - then multiply reminder by 8 to d get to the nearest 1/8”.
What is multiply?
It is over divide.
Formulas for 45* offset?
Travel = offset or advance x 1.414. Offset or advance = travel x .707, Offset or advance = travel / 1.414.
Formula for rise?
Rise = spread x .414
Related Flashcard Decks
Study Tips
- Press F to enter focus mode for distraction-free studying
- Review cards regularly to improve retention
- Try to recall the answer before flipping the card
- Share this deck with friends to study together
Term | Definition |
---|---|
How shall you convert feet and inches into decimal feet? | Change inches into decimal, then divide by 12. |
How shall you convert fraction to a decimal? | Divide denominator into numerator. |
How shall you convert decimal feet into feet and inches? | Multiply by 12 - then multiply reminder by 8 to d get to the nearest 1/8”. |
What is multiply? | It is over divide. |
Formulas for 45* offset? | Travel = offset or advance x 1.414. Offset or advance = travel x .707, Offset or advance = travel / 1.414. |
Formula for rise? | Rise = spread x .414 |
Diagram for grade/slope/pitch? | TF |
Formulas for grade/slope/pitch? | Total fall = grade x distance (answer in inches). Grade = total fall / distance (answer in parts of an inch). Distance = total fall / grade (answer in decimal feet change to feet and inches). Total fall = %grade x distance (answer in decimal feet change to feet and inches). |
Formula for perimeter of a rectangle/squar? | P = 2 lengths + 2 widths. |
Formula for area of a rectangle/square? | A = length x width. |
Formula for circumference of a circle outside diameter of a pipe? | C = 3.1416 x diameter. |
Formulas for area of a circle, inside diameter of a pipe, cross-sectional area. of a pipe? | A = 3.1416 x radius^2. A = .7854 x diameter^2. Answer will be in square inches or square feet. |
Formula for area/volume/capacity of a rectangle/square? | V = length x width x height. Answer will be in cubic inches or cubic feet. |
Formula for volume of a cylinder/tank? | V = 3.1416 x radius^2 x height. V = .7854 x diameter^2 x height. Answer will be in cubic inches or cubic feet. |
How much does 1 gallon of water weights? | 8.34 lbs. |
How many gallons has 1 cubic foot of water? | 7.48. |
How many cubic inches has 1 cubic foot? | 1728. |
How many cubic inches has 1 gallon? | 231. |
How many pounds has 1 cubic inch of water? | 0.0361 lbs. |
How much does 1 cubic foot of water weight? | 62.4 lbs. |
How many lbs/sq.inch does 1 foot high column of water exert? | .434 psi. |
How will 1 psi raise water? | 2.31 feet or 27 3/4”. |
What is atmospheric pressure? | 7 psi. 9’. 7 head pressure. |
Constant %? | 100ths = .00 |
What is usually PPF? | 1/8" or 1/4" per foot pitch. |
What is AFF? | Above finish floor. |
What is invert? | Inside bottom of pipe or trench. |
What is usually % of grade? | 1% or 2%. |
Formulas for % rate? | Portion = base x % rate. % rate = portion / base. Base = portion / % rate. |