Plumbing Design Quiz Part 1 Of ?

21 Questions | Total Attempts: 17

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Plumbing Design Quiz Part 1 Of ?

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

  • 21. 
    Type response below
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