Water Distribution Operator (TX) License D Questions and Complete Solutions.

Water Distribution Operator (TX) License D Questions and Complete Solutions How many inches in a foot - Answer: 12 How many feet in a yard - Answer: 3 What is (pie symbol) - Answer: 3.14 Given the diameter how do you find radius - Answer: 1/2 diameter What is the formula for the area of a square - Answer: LxW What is the formula for the area of a cube - Answer: LxWxD What is the formula for the area of a circle - Answer: (pie symbol)xR^2=A^2 Area should always result in - Answer: x^2 Volume should always result in - Answer: x^3 Formula for Capacity is - Answer: Vol ft^3 x gal/ ft^3= capacity in gallons How many gallons in a cubic foot - Answer: 7.480 1. What is the surface area of the bottom of a rectangular storage tank 10 feet long and 5 feet wide? - Answer: L(ft) x W(ft)=A(ft^2) (Length x Width=Area) 10ft x 5ft=50ft^2 2. How many square feet is the roof of a chlorinator room 8 feet square? - Answer: L(ft) x W(ft)=A(ft^2) (Length x Width=Area) 8ft x 8ft=64ft^2 3. If a trench is 50 feet long and 6 feet wide, how many square feet will the bottom cover? - Answer: L(ft) x W(ft)=A(ft^2) (Length x Width=Area) 50ft x 6ft=300ft^2 4. What is the surface area of the bottom of a circular storage tank 20 feet in diameter? - Answer: (pie symbol) x R^2ft=Aft^2 (3.14 x radius=Area) R=diameter/2 3.14 x 10ft x 10ft=314ft^2 5. What is the surface area of a 35-foot diameter circular roof covering a service center? - Answer: (pie symbol) x R^2ft=Aft^2 (3.14 x radius=Area) R=diameter/2 3.14 x 17.5ft x 17.5ft=961.6ft^2 6. How many square inches and square feet is the end section of a 6-inch pipe? - Answer: (pie symbol) x R^2in=Ain^2 (3.14 x radius=Area) R=diameter/2 3.14 x 3in x 3in=28.26in^2 Convert to ft (28.26in/144(12in^2))=0.196ft^2 7. How many square feet is the end section of an 18-inch pipe? - Answer: (pie symbol) x R^2ft=Aft^2 (3.14 x radius=Area) R=diameter/2 3.14 x 0.75ft x 0.75ft=1.766ft^2 convert to ft (R/in(12 inches in a foot)) 9/12=0.75 8. How many square feet is the end section of a 24-inch pipe? - Answer: (pie symbol) x R^2ft=Aft^2 (3.14 x radius=Area) R=diameter/2 3.14 x 1ft x 1ft=3.14ft^2 9. How many square feet is the end section of a 36-inch pipe? - Answer: (pie symbol) x R^2ft=Aft^2 (3.14 x radius=Area) R=diameter/2 3.14 x 1.5ft x 1.5ft=7.065ft^2 1. How many gallons of water will a 20,000 cubic foot tank hold? - Answer: volume in ft^3 x gal / ft^3 =capacity in gallons 2. How many cubic yards of dirt are removed from a trench 60 feet long, 5 feet wide and 5 feet deep? - Answer: LxWxD/ft^3/yd^3=yd^3 60ftx5ftx5ft/27yd^3=55.55yd^3 3. A rectangular storage tank is 25 feet wide, 40 feet long and 10 feet deep. What is the volume in cubic feet and gallons? - Answer: LxWxD= Vol ft^3 25ftx40ftx40ft=10,000 ft^3 volume in ft^3 x gal / ft^3 =capacity in gallons 10,000x7.48=74,800 4. Calculate the cubic yards of dirt removed from a trench 2000 feet long, 4 feet wide and 6 feet deep. - Answer: LxWxD/ft^3/yd^3=yd^3 2000ftx4ftx6ft/27=1,777.7yd^3