PIPEFITTING NCCER LEVEL 2
QUESTIONS WITH ANSWERS
Gravity flow systems - ans-Consist of piping that is sloped to allow flow and is not
pressurized. These systems usually includes storm and sanitary during services.
Boiling - ans-When water flows upward into the bottom of the cut. A high water table is
one of the causes of boiling.
Trench width and depth - ans-Determines the load that the pipe has to support once
backfilling is complete
Thrust blocks - ans-Designed by engineers, help restrain the forces in an underground
piping system
Excavate bell holes - ans-For each pipe joint
Trenchless pipelaying - ans-The general name for methods of burying pipe lines that do
not involve digging trenches
Boring to run plastic pipeline through the ground - ans-A weak link must be used when
mechanically pulling polyethylene pipe
Hairpin - ans-A large steel hook that slides into the pipe from one end to lift the pipe
Stacking Pipe - ans-Stack all the pipe on timbers or elevated concrete supports to keep
the bottom layer off the ground
Always plays Timbers - ans-Between layers
Concrete Pipes - ans-Should be stored or stacked as close to the installation area as
possible. Set the pipe on blocks placed under the pipe barrel tude avoid damaging the
ends.
Cast iron soil, pipe, and fittings - ans-Do not leak or absorb water, they are easily cut
and joined.
Major disadvantage of cast-iron pipe - ans-It is very heavy material with low, tensile
strength, and is easily broken when mishandled.
, Cast iron soil pipe is available in three basic types, - ans-single hub soil pipe, double
hub soil pipe, and hubless soil pipe
Bell and spigot Pipe - ans-Currently available in two different wall thickness is or
weights: service weight an extra heavy weight. Service weight cast iron pipe is marked
SV and extra heavy weight cast-iron pipe is marked XH.
Belt and spigot piping is currently available in two different wall thickness's or weights -
ans-Service, weight and extra heavy weight. Service way to cast-iron pipe is marked SV
and extra heavy weight cast-iron pipe is marked XH
Matching the weights of the fittings of bell and spigot cast iron spoil pipe is critical
because - ans-They have a bell or hub on one end and a spigot on the other end
Abrasive wheel saws - ans-Is used for cutting pipe out of the trench while the rotary
wheel cutter is used in or out of the trench on pipe up to 30 inches in diameter
A compression joint - ans-It's often used to install bell and spigot cast-iron pipe and
fittings, but be sure to always install cast-iron pipe according to the pipe manufacturers
recommendations.
A lever tool - ans-Is used to install cast iron and ductile iron pipe ranging from 3 to 8
inches
For Pipe, 8 inches and smaller that is laid in dry trenches with a firm clay bottom - ans-A
shovel can be used to push the pipe home. This method is not effective in sandy soils,
wet soil's or rock.
Installing hubless cast iron pipe - ans-The ends of the pipe are held in place by the
stainless steel band and screw clamps which are tightened to 60 inch pounds of torque
and inserted into the neoprene gasket and bonded together. The hub was cast-iron pipe
with this type of joint is used mainly for commercial above ground service systems.
Iron alloy Pipe - ans-Acid resistant form of cast-iron pipe that is unaffected by most
corrosive waste. It is available in two types, duriron and durichlor 51.
Used for disposal of wastes from chemical and Allied industries. Acid resistant
permeates the entire thickness of the metal. - ans-Use for iron alloy pipe
Duriron - ans-Most widely used in comparison to durichlor 51, because it's almost
completely unaffected by the corrosive wastes
Ductility - ans-Refers to its ability to bend under load without breaking or losing its
strength
QUESTIONS WITH ANSWERS
Gravity flow systems - ans-Consist of piping that is sloped to allow flow and is not
pressurized. These systems usually includes storm and sanitary during services.
Boiling - ans-When water flows upward into the bottom of the cut. A high water table is
one of the causes of boiling.
Trench width and depth - ans-Determines the load that the pipe has to support once
backfilling is complete
Thrust blocks - ans-Designed by engineers, help restrain the forces in an underground
piping system
Excavate bell holes - ans-For each pipe joint
Trenchless pipelaying - ans-The general name for methods of burying pipe lines that do
not involve digging trenches
Boring to run plastic pipeline through the ground - ans-A weak link must be used when
mechanically pulling polyethylene pipe
Hairpin - ans-A large steel hook that slides into the pipe from one end to lift the pipe
Stacking Pipe - ans-Stack all the pipe on timbers or elevated concrete supports to keep
the bottom layer off the ground
Always plays Timbers - ans-Between layers
Concrete Pipes - ans-Should be stored or stacked as close to the installation area as
possible. Set the pipe on blocks placed under the pipe barrel tude avoid damaging the
ends.
Cast iron soil, pipe, and fittings - ans-Do not leak or absorb water, they are easily cut
and joined.
Major disadvantage of cast-iron pipe - ans-It is very heavy material with low, tensile
strength, and is easily broken when mishandled.
, Cast iron soil pipe is available in three basic types, - ans-single hub soil pipe, double
hub soil pipe, and hubless soil pipe
Bell and spigot Pipe - ans-Currently available in two different wall thickness is or
weights: service weight an extra heavy weight. Service weight cast iron pipe is marked
SV and extra heavy weight cast-iron pipe is marked XH.
Belt and spigot piping is currently available in two different wall thickness's or weights -
ans-Service, weight and extra heavy weight. Service way to cast-iron pipe is marked SV
and extra heavy weight cast-iron pipe is marked XH
Matching the weights of the fittings of bell and spigot cast iron spoil pipe is critical
because - ans-They have a bell or hub on one end and a spigot on the other end
Abrasive wheel saws - ans-Is used for cutting pipe out of the trench while the rotary
wheel cutter is used in or out of the trench on pipe up to 30 inches in diameter
A compression joint - ans-It's often used to install bell and spigot cast-iron pipe and
fittings, but be sure to always install cast-iron pipe according to the pipe manufacturers
recommendations.
A lever tool - ans-Is used to install cast iron and ductile iron pipe ranging from 3 to 8
inches
For Pipe, 8 inches and smaller that is laid in dry trenches with a firm clay bottom - ans-A
shovel can be used to push the pipe home. This method is not effective in sandy soils,
wet soil's or rock.
Installing hubless cast iron pipe - ans-The ends of the pipe are held in place by the
stainless steel band and screw clamps which are tightened to 60 inch pounds of torque
and inserted into the neoprene gasket and bonded together. The hub was cast-iron pipe
with this type of joint is used mainly for commercial above ground service systems.
Iron alloy Pipe - ans-Acid resistant form of cast-iron pipe that is unaffected by most
corrosive waste. It is available in two types, duriron and durichlor 51.
Used for disposal of wastes from chemical and Allied industries. Acid resistant
permeates the entire thickness of the metal. - ans-Use for iron alloy pipe
Duriron - ans-Most widely used in comparison to durichlor 51, because it's almost
completely unaffected by the corrosive wastes
Ductility - ans-Refers to its ability to bend under load without breaking or losing its
strength
