# Plumbing Design Quiz Part 1 Of ?

21 Questions | Total Attempts: 17  Settings  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

• 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

• 21.
Type response below Back to top