Reference no: EM132469160

Assignment - COLD WATER SUPPLY

Question 1 - A pressure tank of 300 gallons capacity containing air at atmospheric pressure has water pumped into it until a pressure of 30 pounds is registered by the gage.

a) What is the final volume of air?

b) How many gallons of water are pumped into the tank?

Question 2 - Assuming that the water in the 300 gallon tank in question1 is discharged through a faucet 20 feet above the tank, how many gallons of water will remain in the tank when the water stops flowing.

Question 3 - Calculate the total suction lift of a pump when the distance from the pump cylinder to the water level in the well is 15 feet, the diameter of the suction pipe is 1½ inches, and the water is to be pumped at the rate of 20 gallons per minute.

Question 4 - What is the purpose of a corporation cock and how is it installed?

Question 5 - How many gallons of water can be delivered to a height of 30 feet by a pressure tank having a total capacity of 600 gallons, the pressure in the tank being 75 pounds by the gage?

Question 6 - a) In a pneumatic-tank system where the pump and tank are located at an appreciable distance from the point of discharge, what should be the pressure in the tank to insure delivery of a sufficient quantity of water to the fixtures in the building?

b) What should be the height of the suction lift in this system?

Question 7 - If the pressure in the street mains is 80 pounds per square inch, how high will the water rise above the level of the mains?

Question 8 - What is meant by the factor of usage, and how is this factor used in calculating the maximum probable instantaneous water demand for a given building?

Question 9 - Using table VII, determine the capacity of a tank to deliver 150 gallons of water to point 20 feet above the tank, the pressure in the tank being 25 pounds by the gage.

Question 10 - a) If the water pressure in a building is to vary from 50 to 110 pounds per square inch, what test pressure should be applied to the pneumatic tank in the water supply system?

b) How should this test be conducted?