DC 307 || QUESTIONS WITH COMPLETE
SOLUTIONS!!
What are the types of ruptures? correct answers Simple, Elbow, Severed, Compound
What is a Jubilee Pipe Patch? correct answers Prefabricated sheet metal
Secured with bolts and clamps
100 psi
What is the psi of a Soft Patch? correct answers 150 psi
How do you install Soft Patches? correct answers Remove rough edges
Wedge into rupture
Cut wedge 1/2" below mark
Rag or oakum with wedge
Cut of excess
2" overlap on both sides with gasket
Rubber over rupture
Wrap w marlin overlap 1/2" on both sides
Tie off marlin
What is Banding Patch equipment? correct answers Band-it tool, 110 ft roll of strapping,
banding clips, rubber sheet, metal backing plate, face shield, gloves
What is psi of Banding Patch? correct answers 150 psi
How do you install Banding Patch? correct answers Remove rough edges
Rubber gasket 2" overlap all sides
Metal plate
Bands over patch and secure with tool
What is EWARP? correct answers Emergency Water Activated Repair Patch
What are the sizes of EWARP? correct answers Size 1 - 2" x 5'
Size 2 - 4" x 15'
What is the shelf-life of EWARP? correct answers 24 Months
What is the EWARP process? correct answers Remove rust, scale, jagged and protruding
edges
Plastic gloves and glasses
Immerse in fresh water for 20 seconds and wrap
Solid in 15 min with 30 min cure time
What are EWARP advantages? correct answers Excellent for steel and copper
Fresh water, salt water, hydraulic and lubricating oils
Not used on steam or fuel lines
What is max pressure and temperature of EWARP? correct answers 150 psi
, 300 degrees F
What is the object of plugging? correct answers To put something in it or put something over
it
How do you stop a crack? correct answers Drill a 1/4" hole at both end of crack to stop
progression
What is in a plugging kit? correct answers Bag
Various plugs and wedges
Hatchet
5 lb maul
2 lb ball pein hammer
Cold chisel
Caulking iron
Okum
Sheers
How do you repair a crack or hole above the water line? correct answers Plugged at once
with priority given to holes at the waterline on the low side
How do you repair a crack or hole below the water line? correct answers Consider water
pressure
What are the characteristics of wooden plugs and wedges? correct answers Soft wood
effective in holes not over 3" x 2"
Unpainted absorbs more water and grips
Square-ended plugs hold better in plating 1/4" or less in thickness
What type of plugging are mattresses used for? correct answers Large holes
Innerspring mattresses hold shape better
Roll mattress
What are plate patches? correct answers Various sizes up to 5" square
Thick gasket, tube of canvas, oakum or cloth
Secure with machine screws, washer and nuts
What are hinged plate patches for? correct answers Small submerged holes
Are feather pillows effective patches? correct answers No, they collect in a lump and collapse
Kapok life jackets are more effective
Folded blankets can be used in place of
What is a Box Patch? correct answers Steel box
18" square, 6" deep
Open at one end, gasket
Held in place with shoring
Secured with welding
Carry in sizes up to 4' and 1'
SOLUTIONS!!
What are the types of ruptures? correct answers Simple, Elbow, Severed, Compound
What is a Jubilee Pipe Patch? correct answers Prefabricated sheet metal
Secured with bolts and clamps
100 psi
What is the psi of a Soft Patch? correct answers 150 psi
How do you install Soft Patches? correct answers Remove rough edges
Wedge into rupture
Cut wedge 1/2" below mark
Rag or oakum with wedge
Cut of excess
2" overlap on both sides with gasket
Rubber over rupture
Wrap w marlin overlap 1/2" on both sides
Tie off marlin
What is Banding Patch equipment? correct answers Band-it tool, 110 ft roll of strapping,
banding clips, rubber sheet, metal backing plate, face shield, gloves
What is psi of Banding Patch? correct answers 150 psi
How do you install Banding Patch? correct answers Remove rough edges
Rubber gasket 2" overlap all sides
Metal plate
Bands over patch and secure with tool
What is EWARP? correct answers Emergency Water Activated Repair Patch
What are the sizes of EWARP? correct answers Size 1 - 2" x 5'
Size 2 - 4" x 15'
What is the shelf-life of EWARP? correct answers 24 Months
What is the EWARP process? correct answers Remove rust, scale, jagged and protruding
edges
Plastic gloves and glasses
Immerse in fresh water for 20 seconds and wrap
Solid in 15 min with 30 min cure time
What are EWARP advantages? correct answers Excellent for steel and copper
Fresh water, salt water, hydraulic and lubricating oils
Not used on steam or fuel lines
What is max pressure and temperature of EWARP? correct answers 150 psi
, 300 degrees F
What is the object of plugging? correct answers To put something in it or put something over
it
How do you stop a crack? correct answers Drill a 1/4" hole at both end of crack to stop
progression
What is in a plugging kit? correct answers Bag
Various plugs and wedges
Hatchet
5 lb maul
2 lb ball pein hammer
Cold chisel
Caulking iron
Okum
Sheers
How do you repair a crack or hole above the water line? correct answers Plugged at once
with priority given to holes at the waterline on the low side
How do you repair a crack or hole below the water line? correct answers Consider water
pressure
What are the characteristics of wooden plugs and wedges? correct answers Soft wood
effective in holes not over 3" x 2"
Unpainted absorbs more water and grips
Square-ended plugs hold better in plating 1/4" or less in thickness
What type of plugging are mattresses used for? correct answers Large holes
Innerspring mattresses hold shape better
Roll mattress
What are plate patches? correct answers Various sizes up to 5" square
Thick gasket, tube of canvas, oakum or cloth
Secure with machine screws, washer and nuts
What are hinged plate patches for? correct answers Small submerged holes
Are feather pillows effective patches? correct answers No, they collect in a lump and collapse
Kapok life jackets are more effective
Folded blankets can be used in place of
What is a Box Patch? correct answers Steel box
18" square, 6" deep
Open at one end, gasket
Held in place with shoring
Secured with welding
Carry in sizes up to 4' and 1'
