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UWS-108AA-Under Water Tools Part 2
UWS Compressors and Tools 108AA | Drills, Saws, Grinders, Impact Guns, Explosive Actuating, Hydraulics, Lift Bags
36
Sports
Undergraduate 1
12/02/2013

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Term
Saws or grinders underwater must have a
Definition
Deadman Switch
Term
Explosive actuating tools underwater can be used to:
Definition
Provide an air connection to a vessel or container
Patch vessels for salvage
Attach a threaded Stud
Attach timber to steel
Term
A pilot hole is:
Definition
A smaller hole made to allow a larger drill bit to cut properly and easily.
Term
A drill should be held:
Definition
Firmly to not allow it to go easily.
Term
When operating a breaker you should put your:
Definition
weight into the drill to be most effective.
Term
A grinding wheel can only be used underwater and on surface if:
Definition
It is Non-Porris
OR If the wheel has been dried out and tagged.
Term
The same carbide cutter bits are suitable for all metals when using a die grinder: TorF
Definition
False (different bit for aluminium)
Term
Small Piston has a 14cm Dia with 12lbs of Force and moves 5.5"
Large Piston has a 30cm dia.

Give the distance and pounds of force on the large piston.
Definition
1.19735" Travel
55.08 lbs
Term
A device used to control the flow of hydraulic fluid:
Definition
Hydraulic flow control valve
Term
Oil compresses __.__% at 1000psi
Definition
.5%
Term
Oil compresses __.__% at 1000psi
Definition
.33%
Term
Hydraulic Accumulators:
Definition
Holds pressure, awaiting demand from tools. Saves compressors starting up repeatedly.
Term
Hydraulic Tools use __" id hose
Definition
1/2"
>50ft = 5/8"
Term
Types of Hydraulic Pumps:
Definition
Gear Pump
Axial Pump
Rotary Pump
Term
Axial Pump Features:
Definition
low as 100rpm
4000-5000psi
90%-95% effeciency
Laid down to destroke.
Term
Gear and Rotary Pump features:
Definition
2500-3000psi
80% deficiency
low as 500rpm
Term
Oil Viscosity is:
Definition
Thickness, resistance to flow
Term
Flash Point:
Definition
Temperature in which oil flashes to flame
Term
Flame Point:
Definition
Temperature in which oil burns steadily
Term
SAE and ISO:
Definition
Guage for oil
Lower number = Lighter oil
Term
Thin oil =
Definition
Speed - GPM
Wear on parts
Term
Thick Oil =
Definition
Power - PSI
Term
Spool Valve has 2 common positions.
Definition
Open Center System
Closed Center System
Term
When is a closed center system used.
Definition
On a device running on a battery, saves energy.
Term
What does the open center system do?
Definition
Allows oil to run through the tool at all times, keeping it warm and ready for use.
Term
Types of Lift Bags
Definition
Open Bottom Parachute Type
Enclosed Cylinder
Term
Open bottom type lift bag features:
Definition
Restraining Line
Manual Dump Line.
Term
Enclosed bottom type lift bag features:
Definition
Cylinder Type
Very Stable
Pressure Relief 2psi greater than over bottom pressure.
-Not for ascent pulls
-Best for shallow water.
Term
Lift Bag surface checks.
Definition
Test dump valves
examine stitching and seems
Lift strap check
Test WLL
Term
Lift Bag prelift checks.
Definition
ensure air line has no kinks
secure bottom line
secure manual dump line
stay in a safe location
ensure umbilical are not across the load.
Term
Single wire braid psi rating
Definition
1500
Term
2 wire braid psi rating
Definition
3000
Term
spiral wrap psi raiting
Definition
6000
Term
Teflon core lines are meant for:
Definition
High temps.
Term
High pressure hydraulic tools such as jacks and flange spreaders usually operate at what pressure?
Definition
10000psi
Term
Best tool for under 15 feet of water used to remove a large quantity of bottom material would be:
Definition
Suction ejector dredge
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