Chapter 6
When transferring potable water from ship to shore, remove shore cap and flush pier side potable water outlet for how long?
15-30 seconds
What treatment method consists of removing a considerable portion of the suspended solids and colloidal substances?
Primary
Colloidal suspensions include hydrophilic (ready to disperse in water) and hydrophobic (soaps, soluble starch, synthetic detergents)
These flies cause obligate myiasis and the larva inhabit the gastrointestinal canal of animals in the family Equidae.
Bot and Warble flies
(Cuterebra, Dermatobia Gasterophilus, Hypoderma spp., and Oestrus spp.)
40
1 quart gets 2 tablets
4 quarts in a gallon = 8 tablets a gallon
This is the dry, disposable waste resulting from almost all of man's activities.
Rubbish
Garbage is solid or semisolid wet wastes resulting from the preparation, cooking, and serving of food.
The three general types of distillation plants are waste heat, vapor compression, and what?
Waste heat submerged tube type and use heat from diesel engine jacket water.
Vapor compression uses electrical energy
What is a covered pit into which raw sewage is emptied?
Cesspool
A septic tank is a watertight tank underground which raw sewage flows by gravity.
Pit privy (bored hole latrine) 10-25 in hole 15-25 ft deep
The genera most frequently associated with disease transmission are the Aedes, Anopheles, and what?
Culex
Locations for latrines in the field have to be at least how many feet from a water source, yards from food service area, and feet from berthing?
100 ft, 100 yds (300 ft), 50 ft
Flesh fly
120 degrees F
4 inches.
Submarines use 2 1/2 inch hose.
This insect is tan or straw colored, about 15 mm long and distinctively marked with two longitudinal stripes near the head.
German Cockroach
American is dark reddish brown 35 mm long and the anterior dorsal plate behind the head has a posterior border stripe.
Brown-banded has two light yellow cross bands near base of adult wings.
1 ft, 2 1/2 ft, 4 ft.
Serves 25 people and accommodates 2 at a time. Additional trenches 2 ft apart. Dirt at end of the trench. Dirt piled on with each use until 1 ft from the top. Then closed
Free available chlorine, residual concentrations as high as how many PPM at the tap do not cause objectionable tests and odors?
1PPM
65-70%
HTH is extremely flammable. Must be stowed in a locked metal box with 3 1/4 in vent holes mounted on the bulkhead NOT machinery space, flam locker, paint locker, berthing. Only a 7-day supply may be stored at any time (48 6 oz bottles).
Personnel who handle or connect sewage transfer hoses must not subsequently handle potable water hoses without first doing what?
Washing, and changing into clean clothing
Rat guards used by naval vessels should be what diameter and at a minimum of how many feet from the pier and ship?
36 in (3 ft), 6,2
roof rat and Norway rat
Burn barrel latrines are 55 gallon drums cut in half and primed with 3 inches of diesel fuel. When 1/2 - 2/3 full, what is the mixed together to sufficiently cover the contents.
4 parts diesel to one part mogas (gasoline).
Sticks or poles under 4 ft in length should not be used. Needs to be burned to fine ash and may take more than 1 attempt.
What is the signal word for a highly toxic (0-50 mg/kg), an antidote statement of "Call Physician Immediately", and can kill the average person with a taste of a teaspoonful?
"Danger", "Poison", or skull and crossbones.
You have 5,000 gallons of water and need to make a 1 PPM solution with 65-70% HTH. How much HTH do you add?
1 Oz
(Gal x PPM) / (1,000,000 x % strength)
(5,000 x 1) / (1,000,000 x .65)
5,000 / 650,000=.0077 (multiply 128 to get oz)
.98 oz or 1 oz
Personnel working in a CHT pump room, comminutor space or spaces having CHT piping must evacuate if what is detected?
Hydrogen sulfide "rotten egg" smell
CHT-Collection, holding and transfer system
Comminutor- motor driven grinder used to pulp or liquefy sewage solids
When touched, they exude a drop of vesicating fluid through the membranes of the appendage joints.
Chemical toilets are usually obtained as a contract service. If there are 75 people, how many toilets are needed?
4
# of Personnel # of Chemical Toilets
1 to 15 1
16 to 35 2
36 to 55 3
56 to 80 4
61 to 110 5
111 to 150 6
Over 150 Add 1 toilet for each additional 40 persons.
How much 5% liquid Sodium Hypochlorite is needed for 5,000 gallons at 5PPM?
2 qts or 1/2 gallon
(5000 x 5) / (1000000 x .05)
25000 / 50000
.5 = 1/2 gallon or 2 qts