Plumbing Design Quiz Part 1 Of ?
21 Questions
| Total Attempts: 17
This is Part 1 of a? Part quiz for Master Plumber Review. Image courtesy of Rappler and PRCfrom: https://www. Rappler. Com/bulletin-board/83856-prc-results-master-p lumber-licensure-exam
Questions and Answers
- 1.A repair job can be done by 7 people in 8.5 hours. How long will it take for 4 people to complete the same job?
- A.
4 hr 30 min
- B.
14 hr 9 min
- C.
14 hr 53 min
- D.
4 hr 51 min
- 2.During a 24-hr period, a lift station in in a system serving a community of 27,000 people pumped 5000 gpm of wastewater. What was the quantity of wastewater generated per capita expressed on a daily basis? Assume the pump station ran 10 hours on the day in question,.
- A.
420 L/d
- B.
195 gpd
- C.
1008 L/d
- D.
78 gpd
- 3.A pump has a capacity of 8500 gpm and lifts wastewater against a total head of 39 feet. If the pump efficiency is 85%, what size of kW of motor is required?
- A.
95 kW
- B.
194 HP
- C.
74 kW
- D.
162 HP
- 4.The interior of 1,275 feet of 60-inch pipe is uniformly coated with 2.75 inches of grease. How many gallons will this pipe hold when filled with water?
- A.
154,446
- B.
33,811
- C.
26,541,375
- D.
172,178
- 5.If flow through a 10-in pipe is 722 gpm., what is the velocity in feet per second?
- A.
5 ft/sec
- B.
8 ft/sec
- C.
3 ft/sec
- D.
2 ft/sec
- 6.An 8-in, main line needs to be flushed. The length of of pipeline to be flushed is 250 ft. How many minutes will it take to flush the line at 25 gpm?
- A.
7 min
- B.
13 min
- C.
26 min
- D.
31 min
- 7.Calculate the pounds per square inch pressure at the bottom of a tank, if the water level is 33.11 ft deep?
- A.
33.1 psi
- B.
76.5 psi
- C.
14.3 psi
- D.
28.6 psi
- 8.A centrifugal pump delivers 1890 liters per minute against a head of 300 feet with a combined pump and motor efficiency of 70%. What is the cost of the electrical power required to operate the pump 12 hours per day for 2 months? Assume each month has 31 days. The electrical cost is Php 0.06 per kWh
- A.
Php 1,798
- B.
Php 1,405
- C.
Php 925
- D.
Php 775
- 9.A map with a scale of 0.875 inches = 100 feet indicates that manhole "A" is 11.20 inches from manhole "B". What is the actual distance between manholes?
- A.
881.3 ft
- B.
980 ft
- C.
1,280 ft
- D.
2,343.8 ft
- 10.A wet well is 12 feet by 6 feet by 15 ft deep and the influent rate is 600 GPM. With the two pumps running, the level decreases 3'9" in 18 minutes. If pump "A" has a pumping rate of 425 GPM, what is the pumping rate of pump "B"? (Answer in GPM)
- A.
175 GPM
- B.
287 GPM
- C.
488 GPM
- D.
537 GPM
- 11.A ball is dropped into a manhole, 2 minutes 18 seconds later, it is observed 500 feet away in downstream manhole. What is the velocity of the flow in FPS?
- A.
1.59 feet per seconds
- B.
3.62 feet per seconds
- C.
3.90 feet per seconds
- D.
6.22 feet per seconds
- 12.How many gallons are there in pipe that is 18 inches in diameter and 216 feet long?
- A.
1,908 gal
- B.
2,430 gal
- C.
2,561 gal
- D.
2,854 gal
- 13.A contractor is building a house with a basement elevation of 884.6 feet. The stub-out connection elevation is 876.5 feet. If the minimum allowable slope is 3/8 inch per foot, how far from the road can the builder place the house?
- A.
5.1 ft
- B.
27.4 ft
- C.
70.3 ft
- D.
259.2 ft
- 14.Find the total head, in feet, for a pump with a total static head of 19 ft and a head loss of 3.7 feet.
- A.
5.1 ft
- B.
15.3 ft
- C.
22.7 ft
- D.
70.3 ft
- 15.A four cylinder positive displacement pump has a cylinder bore of 4.5 inches with a stroke of 5.5 inches. The pump operates at 1,700 rpm. How long will it take to empty a 72-inch diameter wet well, 33.0 ft deep if it has an inflow of 2,500 gpm?
- A.
0 hr 3 min
- B.
1 hr 0.7 min
- C.
1 hr 87 min
- D.
1 hr 34 min
- 16.What is the pressure head at a fire hydrant in feet, if the pressure gauge reads 121 psi?
- A.
52 ft
- B.
86 ft
- C.
141 ft
- D.
280 ft
- 17.How many gallons of 6.00% sodium hypochlorite solution are needed to disinfect a 1.0 ft diameter pipeline that is 752 ft long? The required dosage is 25.0 mg/L
- A.
0.92 gal
- B.
1.84 gal
- C.
4.43 gal
- D.
15.30 gal
- 18.Two columns of water are filled completely at sea level to a height of 88 ft. Column A is 0.5 inch in diameter. Column B is 5 inches in diameter. What will the two pressure gauges, each attached to the bottom of each column, read?
- A.
A = 3.8 psi; B = 38.0 psi
- B.
A = 8.8 psi; B = 8.8 psi
- C.
A = 20.3 psi; B = 20.3 psi
- D.
A = 38.0 psi; B = 38.0 psi
- 19.What should the flow meter read in gallons per minute if a 12-in diameter main is to be flushed at 5.0 fps?
- A.
1,762 gpm
- B.
2,900 gpm
- C.
3,600 gpm
- D.
3,920 gpm
- 20.The following flows were recorded for the months of February, March and April; Feb. = 197.3 cfs, March = 100,186.2 gpm, April = 255.7 mgd. What was the average daily flow for this three month period?
- A.
127.3 mgd
- B.
175.8 mgd
- C.
4.7 mgd
- D.
527.2 mgd
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