DC307 EXAM QUESTIONS AND
ANSWERS GRADED A+ 2025/2026
Sounding Tape includes a - ANS a 6 inch plump bob and a grounding strap
What is the grounding strap used for in sounding tape? - ANS Soudning JP-5
When air sounds like its rushing out, that means there's potential of - ANS flooding
When air sounds like its rushing in, that means there's potential of - ANS fire
What other alternative methods are used outside of sounding tape? - ANS Moisture
indicating paste and chalk
What is an Allowance Equipage List (AEL)? - ANS A list of every item in a repair kit
What are the plugging kits consist of? - ANS Soft wood
What is the soft wood made out of? - ANS Douglas fir and yellow pine
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What are the two methods for plugging holes? - ANS Put something into it or put something
over it
What is the priority hole? - ANS The hole below the waterline or closest to the surface of the
water
What is the rate of water intrusion equation? - ANS 3600 * A * SQRT (H)
A= Area of hole in sq ft
H= Height of water hole
What are metal box patches suited for? - ANS Holes with jagged edges protruding inwards
What holes does it cover? - ANS 18 inches square and 6 inches deep
How do you control cracks? - ANS Drill 1/4th inch holes at extreme ends of the crack, weld a
plate over it
What are the types of pipe patching? - ANS Soft Patch, Band-it patch, EWARP, Jubilee Patch
Properties of Soft Patches - ANS Used to repair small holes of 150 PSI or less, not suitable for
high pressure steam lines, gas, or flammable fluid line
Properties of Band-It Patch - ANS Used to repair small holes of 150 PSI or less
What are the two sizes of EWARP? - ANS 2 ft by 5 inches or 4 ft by 15 inches
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS GRADED A+ 2025/2026
Sounding Tape includes a - ANS a 6 inch plump bob and a grounding strap
What is the grounding strap used for in sounding tape? - ANS Soudning JP-5
When air sounds like its rushing out, that means there's potential of - ANS flooding
When air sounds like its rushing in, that means there's potential of - ANS fire
What other alternative methods are used outside of sounding tape? - ANS Moisture
indicating paste and chalk
What is an Allowance Equipage List (AEL)? - ANS A list of every item in a repair kit
What are the plugging kits consist of? - ANS Soft wood
What is the soft wood made out of? - ANS Douglas fir and yellow pine
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What are the two methods for plugging holes? - ANS Put something into it or put something
over it
What is the priority hole? - ANS The hole below the waterline or closest to the surface of the
water
What is the rate of water intrusion equation? - ANS 3600 * A * SQRT (H)
A= Area of hole in sq ft
H= Height of water hole
What are metal box patches suited for? - ANS Holes with jagged edges protruding inwards
What holes does it cover? - ANS 18 inches square and 6 inches deep
How do you control cracks? - ANS Drill 1/4th inch holes at extreme ends of the crack, weld a
plate over it
What are the types of pipe patching? - ANS Soft Patch, Band-it patch, EWARP, Jubilee Patch
Properties of Soft Patches - ANS Used to repair small holes of 150 PSI or less, not suitable for
high pressure steam lines, gas, or flammable fluid line
Properties of Band-It Patch - ANS Used to repair small holes of 150 PSI or less
What are the two sizes of EWARP? - ANS 2 ft by 5 inches or 4 ft by 15 inches
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
