CM 2112 TEST 1 QUESTIONS WITH VERIFIED
ANSWERS
On the basis of use, there are two major classifications for piles: - Answers - Sheet and
load-bearing
What are the types of soils in the correct order (according to ASTM size limits), from
largest to the finest? - Answers - Boulders - Gravel - Sand - Silt - Clay
What is the most commonly used laboratory compaction test accepted by highway
departments and other agencies? - Answers - Proctor test
What are the more commonly used technologies for real-time monitoring and control of
haul trucks? - Answers - Global Positioning System and Radio Frequency Identification
Continued hammering after the pile meets refusal, leads to: - Answers - Overdriving
(Driving concrete piles) In order to prevent the development of torsional stresses during
pile driving, it is recommended that... - Answers - The driving cap fits loosely around the
top of the pile
A vibratory hammer drives a pile through a combination of ...
a.) Drop of a heavy ram, and hydraulic energy
b.) Driving force, frequency, amplitude, and free-hanging weight
c.) The impact force of a ram and frequency
d. ) Mechanical and hydraulic energy, combined the vibration - Answers - b.)Driving
force, frequency, amplitude, and free-hanging weight
The impact hammer efficiency is defined as...
a.) The ratio of kinetic energy of the ram immediately after the impact divided by the
rated energy
b .) The ratio of mechanical energy of the ram immediately after the impact divided by
the rated energy
c .) The ratio of kinetic energy of the ram immediately prior to impact divided by the
rated energy
d.) The ratio of hydraulic energy of the ram immediately after the impact divided by the
rated energy - Answers - c.) The ratio of kinetic energy of the ram immediately prior to
impact divided by the rated energy
A mass diagram is a cumulative running total of the surplus or deficient material
quantities along the project profile. (T/F) - Answers - True
, All piles depend on either the friction between the surface of the pile and the soil, or the
load transmission to the soil through the pile's lower tip. (T/F) - Answers - False
If timber piles remain constantly in contact with water (wholly below the water table)
they will deteriorate after a short period of time. (T/F) - Answers - False
Steel pipe piles are least efficient as friction piles as they have substantial surface area
that interacts with the surrounding soil to provide significant frictional load resistance.
(T/F) - Answers - False
(Earthwork Planning) A Type 1 differing site condition exists when actual conditions
differ materially from those "indicated in the contract". (T/F) - Answers - True
Which statement is True about "Type 1 and Type 2 differing site condition" clauses?
(a.) They eliminate the contractor's responsibility for performing a thorough examination
of project conditions.
(b.) They provide the contractor some protection from geotechnical risk and eliminate
the contractor's responsibility for performing a thorough examination of project
conditions.
(c.) They do not provide the contractor any protection from geotechnical risks.
(d.) They provide the contractor some protection from geotechnical risk, but do not
eliminate the contractor's responsibility for performing a thorough examination of project
conditions. - Answers - d.) They provide the contractor some protection from
geotechnical risk, but do not eliminate the contractor's responsibility for performing a
thorough examination of project conditions.
Which of the followings is NOT correct about Radio Frequency Identification (RFID)
technology?
a.) RFID uses electromagnetic scanning technology to read a coded plate on the
equipment
b.) RFID uses low-energy Bluetooth technology to read a barcode on the equipment
c.) Contractors use RFID technology to track fleet movements and other operational
data to improve performance and to schedule routine maintenance.
d.) As the equipment with a coded plate passes the RFID reader, the mounted plate is
scanned for information about the unit - Answers - b.) RFID uses low-energy Bluetooth
technology to read a barcode on the equipment
Which of the following statements is NOT correct about Concrete Piles (Precast-
Prestressed ) ?
a.) Square and octagonal precast-prestressed concrete piles are cast in horizontal
forms on casting beds.
b.) After piles are removed from the forms, they are stored and allowed to cure for 21
days or more before reaching driving strengths.
c.) The piles can be removed from the form as soon as the concrete has developed a
compressive strength of 500 psi.
ANSWERS
On the basis of use, there are two major classifications for piles: - Answers - Sheet and
load-bearing
What are the types of soils in the correct order (according to ASTM size limits), from
largest to the finest? - Answers - Boulders - Gravel - Sand - Silt - Clay
What is the most commonly used laboratory compaction test accepted by highway
departments and other agencies? - Answers - Proctor test
What are the more commonly used technologies for real-time monitoring and control of
haul trucks? - Answers - Global Positioning System and Radio Frequency Identification
Continued hammering after the pile meets refusal, leads to: - Answers - Overdriving
(Driving concrete piles) In order to prevent the development of torsional stresses during
pile driving, it is recommended that... - Answers - The driving cap fits loosely around the
top of the pile
A vibratory hammer drives a pile through a combination of ...
a.) Drop of a heavy ram, and hydraulic energy
b.) Driving force, frequency, amplitude, and free-hanging weight
c.) The impact force of a ram and frequency
d. ) Mechanical and hydraulic energy, combined the vibration - Answers - b.)Driving
force, frequency, amplitude, and free-hanging weight
The impact hammer efficiency is defined as...
a.) The ratio of kinetic energy of the ram immediately after the impact divided by the
rated energy
b .) The ratio of mechanical energy of the ram immediately after the impact divided by
the rated energy
c .) The ratio of kinetic energy of the ram immediately prior to impact divided by the
rated energy
d.) The ratio of hydraulic energy of the ram immediately after the impact divided by the
rated energy - Answers - c.) The ratio of kinetic energy of the ram immediately prior to
impact divided by the rated energy
A mass diagram is a cumulative running total of the surplus or deficient material
quantities along the project profile. (T/F) - Answers - True
, All piles depend on either the friction between the surface of the pile and the soil, or the
load transmission to the soil through the pile's lower tip. (T/F) - Answers - False
If timber piles remain constantly in contact with water (wholly below the water table)
they will deteriorate after a short period of time. (T/F) - Answers - False
Steel pipe piles are least efficient as friction piles as they have substantial surface area
that interacts with the surrounding soil to provide significant frictional load resistance.
(T/F) - Answers - False
(Earthwork Planning) A Type 1 differing site condition exists when actual conditions
differ materially from those "indicated in the contract". (T/F) - Answers - True
Which statement is True about "Type 1 and Type 2 differing site condition" clauses?
(a.) They eliminate the contractor's responsibility for performing a thorough examination
of project conditions.
(b.) They provide the contractor some protection from geotechnical risk and eliminate
the contractor's responsibility for performing a thorough examination of project
conditions.
(c.) They do not provide the contractor any protection from geotechnical risks.
(d.) They provide the contractor some protection from geotechnical risk, but do not
eliminate the contractor's responsibility for performing a thorough examination of project
conditions. - Answers - d.) They provide the contractor some protection from
geotechnical risk, but do not eliminate the contractor's responsibility for performing a
thorough examination of project conditions.
Which of the followings is NOT correct about Radio Frequency Identification (RFID)
technology?
a.) RFID uses electromagnetic scanning technology to read a coded plate on the
equipment
b.) RFID uses low-energy Bluetooth technology to read a barcode on the equipment
c.) Contractors use RFID technology to track fleet movements and other operational
data to improve performance and to schedule routine maintenance.
d.) As the equipment with a coded plate passes the RFID reader, the mounted plate is
scanned for information about the unit - Answers - b.) RFID uses low-energy Bluetooth
technology to read a barcode on the equipment
Which of the following statements is NOT correct about Concrete Piles (Precast-
Prestressed ) ?
a.) Square and octagonal precast-prestressed concrete piles are cast in horizontal
forms on casting beds.
b.) After piles are removed from the forms, they are stored and allowed to cure for 21
days or more before reaching driving strengths.
c.) The piles can be removed from the form as soon as the concrete has developed a
compressive strength of 500 psi.
