NGA-WE-(A)-COURSE General
Knowledge
Why is it necessary to protect plastic pipe from friction? - answer Friction can cause
static electricity, which is a potential ignition source.
the following Statements are TRUE - answer Static electricity is a potential ignition
source.
Tools must be properly grounded to reduce the potential of static discharge.
Charges on the wall surface of the pipe are not uniform and will be located in different
spots.
The following is a cause of friction on a pipeline - answer Physically handling the pipe.
What is one method used to prevent static electricity? - answeranti-static solution (or
soapy water)
Where do you start wetting with anti-static solution (soapy water)? - answeron the ends
(where the pipe touches the ground)
Any agent used to eliminate static electricity must touch what? (2 things) - answerthe
pipe and the ground
In a possible flammable gas-air situation, what should you do? - answerstop the flow of
gas by squeeze-off in separate bell holes
What are (3) methods of controlling static charges on plastic pipe? - answer1. Keep the
pipe grounded
2. Wrap the pipe in moist burlap or cotton tape or anti-static wrap
3. Spray the pipe with a mixture of water and dishwashing-type detergent
What's the correct way to wrap the wet cotton tape around the plastic pipe to control
static electricity? - answerFrom the point where the pipe and soil are in contact towards
the leak or work area
What do you do when there's an equipment malfunction? (2 things) - answerstop the
fusion procedure and evaluate the effects on the process
ex: temperature gauge is showing wrong temp, fusion clamp doesn't secure pipe,
barcode scanner doesn't read barcode
Knowledge
Why is it necessary to protect plastic pipe from friction? - answer Friction can cause
static electricity, which is a potential ignition source.
the following Statements are TRUE - answer Static electricity is a potential ignition
source.
Tools must be properly grounded to reduce the potential of static discharge.
Charges on the wall surface of the pipe are not uniform and will be located in different
spots.
The following is a cause of friction on a pipeline - answer Physically handling the pipe.
What is one method used to prevent static electricity? - answeranti-static solution (or
soapy water)
Where do you start wetting with anti-static solution (soapy water)? - answeron the ends
(where the pipe touches the ground)
Any agent used to eliminate static electricity must touch what? (2 things) - answerthe
pipe and the ground
In a possible flammable gas-air situation, what should you do? - answerstop the flow of
gas by squeeze-off in separate bell holes
What are (3) methods of controlling static charges on plastic pipe? - answer1. Keep the
pipe grounded
2. Wrap the pipe in moist burlap or cotton tape or anti-static wrap
3. Spray the pipe with a mixture of water and dishwashing-type detergent
What's the correct way to wrap the wet cotton tape around the plastic pipe to control
static electricity? - answerFrom the point where the pipe and soil are in contact towards
the leak or work area
What do you do when there's an equipment malfunction? (2 things) - answerstop the
fusion procedure and evaluate the effects on the process
ex: temperature gauge is showing wrong temp, fusion clamp doesn't secure pipe,
barcode scanner doesn't read barcode
