P-5010 Chapter 6 Water Supply Afloat

Question 1

What command is responsible for the design, construction and maintenance of shipboard potable water systems?

Answer 1

Naval Sea Systems Command (NAVSEASYSCOM)

Question 2

What command is responsible for promulgating instructions for ship-to-shore potable water connections and for providing potable water form approved sources when a ship is berthed at a naval facility?

Answer 2

Navy Facilities Engineering Command (NAVFACENGCOM)

Question 3

Who is responsible for the chloride and hydrogen ion (pH) testing of the ship’s potable water?

Answer 3

Engineering Officer

Question 4

What type of water tends to be mineral free and can be highly corrosive to metal piping and storage pipes?

Answer 4

Distilled water

Question 5

If unusual conditions require drastic restriction in the use of potable water, the allowances should not be less than how many gallons per man per day?

Answer 5

2 gallons

Question 6

How many gallons of potable water are specified per day per man by NAVSEA for design considerations?

Answer 6

50 gallons

Question 7

Shipboard potable risers shall be at least how many inches above deck?

Answer 7

18” and turned down

Question 8

What is the maximum temperature setting for hot water heaters serving showers and lavatories?

Answer 8

120 degrees

Question 9

Sealants and lubricants used for potable water piping must be certified to what standard?

Answer 9

NSF/ANSI Standard 61

Question 10

What color is used for potable water sounding tube caps?

Answer 10

Dark blue

Question 11

Potable water hoses must be labeled “POTABLE WATER ONLY” in 1-inch letters approximately every ______ feet

Answer 11

10

Question 12

What are the two Halogens approved to disinfect shipboard water?

Answer 12

Chlorine and Bromine

Question 13

What is the abbreviation for calcium hypochlorite?

Answer 13

HTH

Question 14

How many feet away must locker that store HTH be from any heat source that could exceed 140 degrees?

Answer 14

5 feet

Question 15

What is the maximum number of 6-oz bottles of HTH that can be stored in a locker or bin?

Answer 15

48

Question 16

What is the shelf life of Bromine cartridges?

Answer 16

2 years

Question 17

What should the FAC of water received from an unapproved source of doubtful quality be?

Answer 17

2.0ppm after 30 minute contact time

Question 18

How often must all emergency potable water containers be drained, flushed and refilled?

Answer 18

quarterly

Question 19

What level of FAC should be reached in potable water tanks for ships who cannot identify the source of a bad water taste or odor?

Answer 19

5.0ppm

Question 20

What term describes any connection between two separate piping systems, one containing potable water and the other contains water of unknown or questionable quality?

Answer 20

Cross-Connection

Question 21

What is the most common type of backflow or back-siphonage prevention device?

Answer 21

Vacuum Breaker

Question 22

What percentage of ice machines require weekly bacteriological testing?

Answer 22

25 percent

Question 23

When pH levels begin to rise to what level, will the disinfectant properties of chlorine and bromine be affected?

Answer 23

8.5 and above

Question 24

What department is responsible for salinity testing of ship produced water?

Answer 24

Engineering

Question 25

How often is halogen residuals of potable water tested by the MDR?

Answer 25

Daily

Question 26

How often must bacteriological testing of potable water be conducted by the MDR?

Answer 26

Weekly