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CM 2112 Midterm Questions with Answers
(100% Correct Answers)
The attachment that holds the pile firmly in place during the upstroke of the
ram and prevents distortion to the top of the pile. Answer: Driving head
attachments
The lower end of a driven pile; pile tip. Answer: Foot of a Pile
The thickness of the metal of a pile Answer: Wall thickness
A cast-in-place concrete end-bearing pile, frequently patented, constructed so
that concrete is paced or forced out into a bulk or pedestal at the base of the pile
Answer: Pedestal Pile
A weight configured to slide in pile hammer leads or within a hollow pile
which has a formed bale or swivel at its top by which it can be mechanically
lifted and dropped to drive pile. Answer: Drop/Gravity Hammer
Power tool used to agitate and consolidate freshly placed concrete and produce
contact with the form. Answer: Vibrator
A drop hammer can normally deliver 40 to 80 blows per minute. Answer: False
Concrete piles cure for 21 days or more to reach driving strengths. Answer:
True
A differential-acting hammer is also known as a steam hammer. Answer: True
The friction pile transmits the load to the soil through the pile's lower tip.
Answer: False
Non displacement cast-in-place concrete piles require a shell or a pipe. Answer:
False
Which type of pile hammer is a modified single-acting hammer? Answer:
Differential-Acting Hammers
, 2
Which type of pile combines the advantages of a high-quality concrete core
with the high tensile strength of the external steel casing? Answer: Steel-
Concrete Composite Piles
What type of leads system is not attached at the bottom of the crane or driving
platform? Answer: Swing leads
What type of pile hammer is suitable for driving piles on remote projects that
require only a few piles and for which the time completion is not an important
factor? Answer: Drop hammer
Which type of pile is excellent for fender system use? Answer: Plastic with Steel
Pipe Core Piles
A contractor will use a single-acting air hammer to drive concrete piles. If the
pile weighs 21,480 lb, what is the recommended hammer weight? Answer:
21,480
A contractor will use a single-acting air hammer to drive concrete piles. If the
pile weighs 23,800 lb, what is the minimum weight that can be used? Answer:
7854
Materials that will decay or produce subsidence in embankments. Answer:
Muck
Enables either end of the blade to be raised or lowered in the vertical plane of
the blade. Answer: Tilt
Turning the dozer blade so that it is not perpendicular to the direction of the
travel. Answer: Angling
A tractor unit that has a blade attached to push material from one location to
another. Answer: Dozer
A horizontal distance of 100 feet. Answer: Station
CM 2112 Midterm Questions with Answers
(100% Correct Answers)
The attachment that holds the pile firmly in place during the upstroke of the
ram and prevents distortion to the top of the pile. Answer: Driving head
attachments
The lower end of a driven pile; pile tip. Answer: Foot of a Pile
The thickness of the metal of a pile Answer: Wall thickness
A cast-in-place concrete end-bearing pile, frequently patented, constructed so
that concrete is paced or forced out into a bulk or pedestal at the base of the pile
Answer: Pedestal Pile
A weight configured to slide in pile hammer leads or within a hollow pile
which has a formed bale or swivel at its top by which it can be mechanically
lifted and dropped to drive pile. Answer: Drop/Gravity Hammer
Power tool used to agitate and consolidate freshly placed concrete and produce
contact with the form. Answer: Vibrator
A drop hammer can normally deliver 40 to 80 blows per minute. Answer: False
Concrete piles cure for 21 days or more to reach driving strengths. Answer:
True
A differential-acting hammer is also known as a steam hammer. Answer: True
The friction pile transmits the load to the soil through the pile's lower tip.
Answer: False
Non displacement cast-in-place concrete piles require a shell or a pipe. Answer:
False
Which type of pile hammer is a modified single-acting hammer? Answer:
Differential-Acting Hammers
, 2
Which type of pile combines the advantages of a high-quality concrete core
with the high tensile strength of the external steel casing? Answer: Steel-
Concrete Composite Piles
What type of leads system is not attached at the bottom of the crane or driving
platform? Answer: Swing leads
What type of pile hammer is suitable for driving piles on remote projects that
require only a few piles and for which the time completion is not an important
factor? Answer: Drop hammer
Which type of pile is excellent for fender system use? Answer: Plastic with Steel
Pipe Core Piles
A contractor will use a single-acting air hammer to drive concrete piles. If the
pile weighs 21,480 lb, what is the recommended hammer weight? Answer:
21,480
A contractor will use a single-acting air hammer to drive concrete piles. If the
pile weighs 23,800 lb, what is the minimum weight that can be used? Answer:
7854
Materials that will decay or produce subsidence in embankments. Answer:
Muck
Enables either end of the blade to be raised or lowered in the vertical plane of
the blade. Answer: Tilt
Turning the dozer blade so that it is not perpendicular to the direction of the
travel. Answer: Angling
A tractor unit that has a blade attached to push material from one location to
another. Answer: Dozer
A horizontal distance of 100 feet. Answer: Station
