Construction Coordinator II - Questions With Detailed
Solutions
What mechanisms do pit dry boring machines utilize to bore through soil and
underneath obstacles? Correct Answer - Hydraulic power, a rod pusher,
steel rods, and a piercing tool
When backfilling a boring pit or trench what should be done to protect the
buried conduit or cable in conduit (CIC)? Correct Answer - Remove
accessible rocks and backfill all but the top 12 inches of the pit or trench with
sand
When using a fluid-assisted boring machine, why is the drilling fluid added
when pulling the drill string back through the hole? Correct Answer - To
help the rotating back-reamer expand the drilled pilot hole diameter and
reduce the drag on the conduit that is being pulled into place
When must all fluid assisted boring machine operators and crew members do
in case of an inadvertent utility cut or other unforseen accident? Correct
Answer - Follow a company and equipment manufacturer guidelines and
safety procedures
What do electrical grid mats that are bonded to a fluid assisted boring system
provide? Correct Answer - Operator protection in case of contact with
electrical lines the boring equipment and machine operators are at the same
electrical potential
Which type of vibratory plow is an attachment to a tractor or trenches and
requires a ground person to manually guide the conduit into the feed chute as
the plow cuts through the ground? Correct Answer - The Modular
Vibratory Plow
In which areas is the use of a Vibratory plow much more economical than
trenching? Correct Answer - In underdeveloped areas where a large
tractor can be maneuvered
How can coaxial cable be plowed using a plow machine without a cable reel
carrier? Correct Answer - Lay the coaxial cable along the bury route and
, have a helper guide the coaxial cable into the feed chute of the forwarding
plow
When preparing to plow conduit how long should the starter trench be?
Correct Answer - A length that allows the plow blade to be lowered to the
burial depth without violating the minimum bend radius of the attached
conduit
When using a surface dry boring machine what is the preferred forward speed
of the machine? Correct Answer - A speed that allows a boring bit to work
freely without being forced
What is the purpose of a portable conduit fishing system? Correct Answer -
It is used to blow a pull line through the conduit
How much contraction will 1200ft of conduit have if the temp changes from
94F to 54F when the rate of contraction is 1 1/2 in per 100ft per 20F change?
Correct Answer - 36 inches
When directly burying coaxial cable, Correct Answer - Avoid reverse
bending of the coaxial cable when unreeling the coaxial cable
What is the proper method for removing the coaxial cable from its reel for a
direct burial operation? Correct Answer - With the reel on an appropriate
stand pull the cable from the bottom of the reel
What may be required to remove a large rock from the ground during
trenching? Correct Answer - Using a Backhoe
When digging the trench, Correct Answer - First confirm that all utilities
have located their lines
What should be done before using a Chain Trencher? Correct Answer - It
should be inspected for any loose bolts, broken chain teeth, or any types of
fluid leaks before beginning its operation
What does the Boom do to the Chain on the Chain Trencher? Correct
Answer - It is spring loaded to create tension on the chain
Solutions
What mechanisms do pit dry boring machines utilize to bore through soil and
underneath obstacles? Correct Answer - Hydraulic power, a rod pusher,
steel rods, and a piercing tool
When backfilling a boring pit or trench what should be done to protect the
buried conduit or cable in conduit (CIC)? Correct Answer - Remove
accessible rocks and backfill all but the top 12 inches of the pit or trench with
sand
When using a fluid-assisted boring machine, why is the drilling fluid added
when pulling the drill string back through the hole? Correct Answer - To
help the rotating back-reamer expand the drilled pilot hole diameter and
reduce the drag on the conduit that is being pulled into place
When must all fluid assisted boring machine operators and crew members do
in case of an inadvertent utility cut or other unforseen accident? Correct
Answer - Follow a company and equipment manufacturer guidelines and
safety procedures
What do electrical grid mats that are bonded to a fluid assisted boring system
provide? Correct Answer - Operator protection in case of contact with
electrical lines the boring equipment and machine operators are at the same
electrical potential
Which type of vibratory plow is an attachment to a tractor or trenches and
requires a ground person to manually guide the conduit into the feed chute as
the plow cuts through the ground? Correct Answer - The Modular
Vibratory Plow
In which areas is the use of a Vibratory plow much more economical than
trenching? Correct Answer - In underdeveloped areas where a large
tractor can be maneuvered
How can coaxial cable be plowed using a plow machine without a cable reel
carrier? Correct Answer - Lay the coaxial cable along the bury route and
, have a helper guide the coaxial cable into the feed chute of the forwarding
plow
When preparing to plow conduit how long should the starter trench be?
Correct Answer - A length that allows the plow blade to be lowered to the
burial depth without violating the minimum bend radius of the attached
conduit
When using a surface dry boring machine what is the preferred forward speed
of the machine? Correct Answer - A speed that allows a boring bit to work
freely without being forced
What is the purpose of a portable conduit fishing system? Correct Answer -
It is used to blow a pull line through the conduit
How much contraction will 1200ft of conduit have if the temp changes from
94F to 54F when the rate of contraction is 1 1/2 in per 100ft per 20F change?
Correct Answer - 36 inches
When directly burying coaxial cable, Correct Answer - Avoid reverse
bending of the coaxial cable when unreeling the coaxial cable
What is the proper method for removing the coaxial cable from its reel for a
direct burial operation? Correct Answer - With the reel on an appropriate
stand pull the cable from the bottom of the reel
What may be required to remove a large rock from the ground during
trenching? Correct Answer - Using a Backhoe
When digging the trench, Correct Answer - First confirm that all utilities
have located their lines
What should be done before using a Chain Trencher? Correct Answer - It
should be inspected for any loose bolts, broken chain teeth, or any types of
fluid leaks before beginning its operation
What does the Boom do to the Chain on the Chain Trencher? Correct
Answer - It is spring loaded to create tension on the chain
