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The fit of the pipe to ditch should be inspected ___ the backfilling operations.
ANSWERS: prior to
When a bore hole is at least ______ larger than the pipe to be installed, the end of
the
drill pipe is connected to a reamer that is attached to a swivel that is
connected to the product pipe.
ANSWERS: 25%
During pneumatic tests, what needs to be installed in line to protect testing
equipment and the facility being tested?
ANSWERS: regulator
Title 49, CFR 195. A hydro-test being performed on new buried pipeline must
be tested for at least ____________ additonal hours at a pressure equal to
or greater than __________________________________________________________ of
MOP if it will not be visually inspected for leaks test.
ANSWERS: 4, 110%
,According to OSHA, where oxygen deficiency or a hazardous atmosphere
exists or could reasonably be expected to exist, such as in excavations in
landfill areas or
excavations in areas where hazardous substances are stored nearby, the
atmospheres in the excavation shall be tested before employees enter
excavations greater than
__________in depth.
ANSWERS: 4 feet
The stress in a pipe of wall thickness, t, acting circumferentially in a plane
perpendicular to the longitudinal axis of the pipe, produced by the pressure,
P, of the fluid in pipe of diameter, D, and is determined by BarlowaETMs
formula.
ANSWERS: Hoop stress
__________shall be inspected during installation to determine that the carrier pipe
is
supported, sealed, and insulated from the casing.
ANSWERS: Cased crossings
According to Title 29, CFR 1910, Subpart L: How close should fire extinguishers
be from Class B hazards?
ANSWERS: Within 50 feet
The actual steady state pressure at a discrete point within a pipeline system at a
specific time.
ANSWERS: Operating pressure
, Corrective action is taken to prevent ____ ?
ANSWERS: recurrence
A method of NDT that typically uses a dye and a contrast to reveal surface
breaking discontinuities in a weld.
ANSWERS: penetrant testing (also known as dye penetrant testing)
A condition in which a circular pipe forms into an ellipse, usually as the result of
external forces.
ANSWERS: Ovality
Per API 1104, repair to the weld face located and contained within the
external reinforcement, including external undercut is a ?
ANSWERS: cover pass repair
Potholing can be performed either through hand digging or _ ?
ANSWERS: hydro-vac
According to Title 49, CFR 195, Subpart E: Carbon dioxide pipelines may use
inert gas or carbon dioxide as the test medium if the maximum hoop stress
during the test does not exceed percent of specified minimum yield
strength and other conditions are
met.
ANSWERS: 80%