DC, CHT, & Ballasting Flashcards
(102 cards)
1
Q
What is CHT?
What is the communication circuit?
A
- CHT is the system in which sewage is collected in a tank where it is held on board or transferred overboard or to a sewage facility
- CHT is the system. Sewage is what flows through the CHT system
- X52J
2
Q
What is Soil?
What is Waste?
A
- Soil: Sewage: Black water. The waste of human origin from water closets (toilets) or urinals
- Waste: Grey water. Waste water. Discarded water from deck drains, lavatories, showers, dishwashers, laundries, garbage grinders, and medical facilities.
3
Q
Where are the sewage tanks onboard USS Harpers Ferry located?
A
- Total of seven tanks
- Main CHT pump room 5-33-1-Q (14029 gallon)
- Port CHT pump room 3-107-2-Q (650 gallon)
- Starboard CHT pump room 3-107-1-Q (650 gallon)
- One in each main space and aux space (15 gallon)
4
Q
What are the three modes of CHT?
A
- Inport: Sewage and grey water are collected in main CHT. Pump Controller switches are placed in Auto for discharge to a shore/ barge facility
- Transit: While transiting a restricted zone, sewage is diverted to the tank and Grey water is diverted to the overboard position. Pump controller switches are in the OFF position
- At Sea: Sewage and Grey water are diverted overboard. Pump Controller switches are place in the AUTO position
5
Q
What is H2S?
A
- H2S is an odorless and colorless gas that may cause serious injury or death. Poisoning usually occurs from inhalation
6
Q
Sewage Clean up?
A
- If a Sewage Spill occurs clean the area with hot potable water, stock detergent and Betadine/Wescodyne/Povidone-Iodine Solution.
- Personal Protective Equipment (PPE) : Disposable Coveralls, goggles, Faceshield, Rubber Boots, Laundry Bags, Impermeable Rubber Gloves
7
Q
What is ballasting?
What is deballasting?
A
- Ballast: to expertly sink the ship for the purpose of Stability due to heavy seas, Amphibious Operations, Low Bridge or we have run a ground
- DEBALLASTING IS WHEN WE RAISE THE SHIP. PURPOSE FOR RAISING SHIP; SHALLOW WATER, AMPHIB OPS, BETTER FUEL CONSUMPTION
8
Q
How many Ballast tanks are there? And how are they drained/ filled?
A
- 85 BALLAST TANKS ONBOARD. 69 FIFTH AND SIXTH DECK TANKS, 16 THIRD DECK TANKS
- 3RD DECK TANKS ARE FIRE MAIN FILLED AND GRAVITY DRAINED DUE TO BEING ABOVE THE WATERLINE.
- 5TH AND 6TH DECK TANKS ARE BELOW THE WATERLINE SO THEY ARE GRAVITY FILLED AND BLOW OUT WITH DBAC’S.
- TO FILL 5TH AND 6TH DECK TANKS YOU NEED TO OPEN SEA VALVE, SHUT BLOW, AND OPEN VENT.
- TO DRAIN 5TH AND 6TH DECK TANKS TO NEED TO OPEN BLOW, SHUT VENT, OPEN SEA AFTER PRESSURE BUILD UP
9
Q
How many HPU’s are onboard and where are they?
What is the bullet?
What do HPU’s operate?
A
- 5 HYDRAULIC POWER UNITS ONBOARD (HPU). 1 ON REFFER DECKS, 2 IS BY MAIN 1’S ESCAPE TRUNK, 3 IS BY DEGAUSSING, 4 IS OUTSIDE REPAIR 3, 5 IS INSIDE STBD MACHINARY ROOM
- THE BULLET” IS THE SERVICE TANK TO HPU’S AND IT IS LOCATED IN HORSESHOE PWAY STBD SIDE
- FM FILL, SEA VALVE, AND GRAVITY DRAIN VALVES.
10
Q
How many DBAC’s are onboard?
Where are they located?
How much PSI?
Can it be started from ballast control?
A
- 4 DEBALLASTING AIR COMPRESSORS (DBAC) ONBOARD. 1 AND 2 ARE IN FWD AC, 3 AND 4 ARE IN AFT DEBAC (STBD FANTAIL). NEED 8-12 PSI TO BLOW TANK. CANNOT START FROM BALLAST CONTROL ONLY CHANGE MODE OR TURN OFF.
11
Q
Where is ballast control?
What is a list?
A
- BALLAST CONTROL IS NEAR STBD QUARTERDECK.
- LIST IS DEGREE FROM PORT TO STBD. TRIM IS FROM FWD TO AFT. 5 DEGREES IS ABNORMAL
- Both are read from a clinometer. just depends on position
12
Q
What is draft?
A
- How deep the ship sits in water and can be read on the pier with numbers on the side of the ship. bottom of the number is 6 inches. Top of the number to bottom of the next number is 6 inches
13
Q
How much water does an LCU need?
A
- 6-8 feet on the well
14
Q
How much water does an LCAC need?
A
- 0-6 inches
15
Q
How much water does an AAV (recovering) need?
A
- 3-5 feet
16
Q
How much water does an AAV (launching) need?
A
- 1 foot
17
Q
What are the four pipe patching methods?
A
- EWARP
- Soft patch
- Jubilee
- Banding Patch
18
Q
What does EWARP stand for
A
- Emergency water actuated repair patch
19
Q
What PSI can EWARP hold?
A
- 150psi
20
Q
What systems cannot be patched with EWARP?
A
- Potable water
- Fuel
- Steam
21
Q
What does the soft patch consist of?
A
- Wedge
- Gasket
- Marlin
- Oakum
22
Q
What PSI can a soft patch hold?
A
- 150psi
23
Q
What PSI can a jubilee patch hold?
A
- 100psi
24
Q
What’s unique about the jubilee patch?
A
- Can be applied to pressurized systems
25
What are the components of a banding patch?
- Gasket
- Steel shole
- banding
- banding clip
- cutter
- banding tool
26
What PSI can a banding patch hold?
- 150psi
27
What is the minimal number of bands required?
- 3
28
What are the 5 portable dewatering equipment?
- S-type
- peri jet
- derbishire
- ESP
- P-100
29
What portable educators are operated by firemain?
- S-type
- peri jet
- derbishire
30
What type of power is used to operate the ESP?
- 440v
31
Who is authorized to activate the ESP?
- Repair electrician
32
What cannot be passed through the ESP?
- Fuel
- Hot water
- Debris (Strainer)
33
How many P-100 pumps do we have?
- 3
34
Where are the P-100 pumps located?
- Boat deck, STBD & Port quarterdeck
35
What type of pump is the P-100?
- Centrifugal pump
36
What is the fuel tank capacity on the P-100?
- 1.45 Gallons
37
What is the rated capacity of the P-100?
-20ft suction lift, 100 gpm@83psi
38
What is the primary purpose of the P-100?
- Primary: Firefighting
- Secondary: Dewatering
39
How many spaces are covered by halon?
- 10
40
What spaces are covered by halon?
- AMR1, AMR2, MMR1, MMR2, FLAM1, FLAM2, PAINT MIX, TROOP FLAM, JP-5 Pump room, Hazardous material ready issue
41
What actuates halon?
- 5Ibs CO2 bottle
42
What the pressure switches that's actuated by C02?
- Lights and horns, Ventilation and dampeners, time delay
43
What are the three colors of lights used by halon?
- White (power available)
- Amber (actuated)
- Red (Halon discharged)
44
What state is halon in the bottles?
- Liquid state pressured with nitrogen (600psi)
45
What are the time delays for halon?
- 30+/-5 sec (unmanned)
- 60+/-10 sec (manned)
46
What is the purpose of the time delay?
- To allow for the vent damners to close
- for personnel to evacuate the space
47
how long does it take halon to cover the space?
- Within 10 seconds
48
What is the scientific name for halon?
- bromotrifluoromethane
49
What type of firemain do we have?
- Double horizontal loop
50
What deck are the loops on?
- 2nd deck
- 03 level
51
How many zebra valves isolate the system?
- 4
52
Where are the zebra valves located?
- repair 2
- AFT of armory 2nd deck
- 03 marine berthing
- FWD repair 4
53
How many fire pumps do we have?
- 7
54
What does AFFF stand for?
- Aqueous Film Forming Foam
55
How many AFFF stations do we have?
- 4
56
Where are the AFFF stations located?
- 2nd deck (1-AFT A/C, 2--AFT MMR1 escape trunk, 3-FWD armory, 4FWD ships laundry)
57
how large are the AFFF tanks?
- 800 gallons
58
Where are the AFFF refill stations located?
- 1st deck above the AFFF stations
59
What is the purpose of the AFFF proportioners?
- To maintain concentrate ratio
60
What is the concentrate ratio?
- 94% sea water to 6% AFFF
61
How do you activate the AFFF station?
- electrical: manual control valve
- hydralic: SOPV
62
Where can you activate the AFFF station?
- pushbutton at each AFFF station
63
What is SOPV?
- Solenoid operated Pilot Valve
64
What does AFFF provide to?
- VSA, VTA, well deck, flight deck, machinery room bilges (AMR&MMR only), JP-5 pump room, hose reels
65
What is the purpose of AFFF bilge sprinkling?
- To create a foam blanket, vapor lock over fuel or oil
66
How many main eductors do we have?
- 4
67
What are the eductors rated at?
- 650gpm
68
where are the eductors located?
-Main and aux spaces
69
What does PECU stand for?
- Portable Exothermic Cutting Unit
70
What is the PECU primary use?
- Accessing spaces to rescue personnel
71
What is the range of a 15Ib CO2 bottle?
- 4-6 feet from the horn
72
What is the 15Ib bottle length of time?
- 40 seconds
73
What is the primary class of fire for the C02 bottle?
- Class C
74
What does PKP stand for?
- Potassium Bicarbonate
75
What are the sizes of the PKP bottles?
- 18 and 27Ib
76
What is the range of the PKP bottles?
- 18: 19
- 27: 21
77
What is the range of the PKP bottles?
- 18: 10
- 27: 11
78
What does PKP do to electronic components?
- It's corrosive
79
What class of fire does PKP combat?
- B
80
What is the range of a aportable 28Ib AFFF extinguisher?
- 15 feet
81
How long will the bottle last with continuous use?
- 55-65 seconds
82
What class fire does AFFF combat?
- A and B
83
How many gallons does AFFF produce?
- 16
84
What does NFTI stand for?
- Nava Fire/fighting Thermal Imager
85
What overhaul gear is in the repair locker?
- Rake, Shovel, Halogen, Axe, NFTI
86
What does CBR stand for?
- Chemical, Biological, Radiation
87
A chemical agent is what?
- A substance through chemical reactions within the human body produces lethal or damaging effects on personnel
88
What are chemical agents used for?
- Weapons of mass destruction to kill, injure, or incapacitate opposing forces
89
What chemical detector do we have?
- M256A1
90
What does it detect?
- Nerve, blister, and blood agents
91
What paper tests for agent?
- M8 & M9
92
What does M8/M9 paper detect?
- liquid nerve and blister agents
93
What is the response time for M8/M9 paper?
- 20 seconds (M8), 10 seconds (M9)
94
How does the paper identify agent?
- it changes color
95
What color can the M8 turn into?
- Yellow/ green (nerve), red (blister)
96
What color can M9 turn into?
- some shades of red, more sensitive than M8
97
What does MOPP stand for?
- Mission Oriented Protective Procedure
98
What installed chemical detector does harpers ferry have?
- IDPS-LR
99
What portable agent detector do we have?
- dry filter unit
100
How long do we have to deliver sample to shore facility?
- 24H
101
What gas mask do we have?
- M-50
102
What radiological detector do we have?
- AN-PDQ-1(IM-265) & (DT-680)
