FHWA Drilled Shaft Foundation Inspection Qualification Exam

FHWA Drilled Shaft
Foundation Inspection
Qualification Exam

,FHWA Drilled Shaft Foundation Inspection Qualification Exam



Question 1
Match each numbered concern to its subject area. Which answer preserves all of the
associations?
1. Drilling Rigs
2. Mix design requirements, required slump (high-slump/flowable concrete), workability,
retarders, and set-control admixtures
3. Principles, advantages, and limitations of Cross-hole Sonic Logging (CSL), Gamma-Gamma
Logging (Nuclear Density), Thermal Integrity Profiling (TIP), and Low-Strain Integrity Testing
(Sonic Echo/Impulse Response)

A. 1: Equipment, Tools, and Rig Operation; 2: Concrete Properties for Drilled Shafts; 3: Integrity
Testing Methods
B. 1: Integrity Testing Methods; 2: Concrete Properties for Drilled Shafts; 3: Equipment, Tools,
and Rig Operation
C. 1: Concrete Properties for Drilled Shafts; 2: Integrity Testing Methods; 3: Equipment, Tools, and
Rig Operation
D. 1: Equipment, Tools, and Rig Operation; 2: Integrity Testing Methods; 3: Concrete Properties
for Drilled Shafts

Correct Answer: A
Full Explanation: The correct associations are 1 with Equipment, Tools, and Rig Operation
(Drilling Rigs); 2 with Concrete Properties for Drilled Shafts (Mix design requirements, required
slump (high-slump/flowable concrete), workability, retarders, and set-control admixtures); 3 with
Integrity Testing Methods (Principles, advantages, and limitations of Cross-hole Sonic Logging
(CSL), Gamma-Gamma Logging (Nuclear Density), Thermal Integrity Profiling (TIP), and Low-Strain
Integrity Testing (Sonic Echo/Impulse Response)). Exchanging these topics changes the subject of
one or more concerns rather than preserving their distinct meanings.




Questions and Explanations 2

,FHWA Drilled Shaft Foundation Inspection Qualification Exam



Question 2
Consider the following concerns in order. Which answer associates each one with its most
direct topic?
1. Casing Construction Method
2. Integrity Testing Methods
3. skin friction and end bearing

A. 1: Post-Installation Integrity Testing and Remediation; 2: Construction Methods; 3: History,
advantages, structural applications, and load transfer mechanisms
B. 1: History, advantages, structural applications, and load transfer mechanisms; 2: Construction
Methods; 3: Post-Installation Integrity Testing and Remediation
C. 1: Post-Installation Integrity Testing and Remediation; 2: History, advantages, structural
applications, and load transfer mechanisms; 3: Construction Methods
D. 1: Construction Methods; 2: Post-Installation Integrity Testing and Remediation; 3: History,
advantages, structural applications, and load transfer mechanisms

Correct Answer: D
Full Explanation: The correct associations are 1 with Construction Methods (Casing Construction
Method); 2 with Post-Installation Integrity Testing and Remediation (Integrity Testing Methods); 3
with History, advantages, structural applications, and load transfer mechanisms (skin friction and
end bearing). Exchanging these topics changes the subject of one or more concerns rather than
preserving their distinct meanings.



Question 3
Match each numbered concern to its subject area. Which answer preserves all of the
associations?
1. Procedures for initial placement, maintaining embedment of the tremie seal within the fresh
concrete, and gradual extraction
2. Excavation, inspection protocols, and management of minor water accumulation

A. 1: Dry Construction Method; 2: Dry Construction Method
B. 1: Tremie Handling; 2: Tremie Handling
C. 1: Dry Construction Method; 2: Tremie Handling
D. 1: Tremie Handling; 2: Dry Construction Method

Correct Answer: D
Full Explanation: The correct associations are 1 with Tremie Handling (Procedures for initial
placement, maintaining embedment of the tremie seal within the fresh concrete, and gradual
extraction); 2 with Dry Construction Method (Excavation, inspection protocols, and management
of minor water accumulation). Exchanging these topics changes the subject of one or more
concerns rather than preserving their distinct meanings.




Questions and Explanations 3

, FHWA Drilled Shaft Foundation Inspection Qualification Exam



Question 4
The main issue being considered is Applicability (unstable soils, below the water table). Which
topic is the closest match?

A. Subsurface Exploration, Soils, and Rock Identification
B. Integrity Testing Methods
C. Wet Construction Method
D. Dimensional Tolerances

Correct Answer: C
Full Explanation: Wet Construction Method is the most direct match because its subject matter
includes Applicability (unstable soils, below the water table). By contrast, Integrity Testing
Methods concerns Principles, advantages, and limitations of Cross-hole Sonic Logging (CSL),
Gamma-Gamma Logging (Nuclear Density), Thermal Integrity Profiling (TIP), and Low-Strain
Integrity Testing (Sonic Echo/Impulse Response). The relevant distinction is the specific focus of
the discussion, rather than a broad similarity between topics.



Question 5
Which answer gives the correct topic for each numbered focus, without exchanging their roles?
1. Verifying plan location, plumbness, alignment, bottom elevation, and minimum depth
2. Placement Techniques
3. Inspector's Role and Responsibilities
4. Assessing hydrogeological conditions and potential impacts on excavation stability

A. 1: Dimensional Tolerances; 2: Concrete Placement Operations; 3: Introduction, Roles, and
Responsibilities; 4: Groundwater Recognition
B. 1: Concrete Placement Operations; 2: Dimensional Tolerances; 3: Introduction, Roles, and
Responsibilities; 4: Groundwater Recognition
C. 1: Introduction, Roles, and Responsibilities; 2: Dimensional Tolerances; 3: Concrete Placement
Operations; 4: Groundwater Recognition
D. 1: Dimensional Tolerances; 2: Groundwater Recognition; 3: Concrete Placement Operations; 4:
Introduction, Roles, and Responsibilities

Correct Answer: A
Full Explanation: The correct associations are 1 with Dimensional Tolerances (Verifying plan
location, plumbness, alignment, bottom elevation, and minimum depth); 2 with Concrete
Placement Operations (Placement Techniques); 3 with Introduction, Roles, and Responsibilities
(Inspector's Role and Responsibilities); 4 with Groundwater Recognition (Assessing
hydrogeological conditions and potential impacts on excavation stability). Exchanging these
topics changes the subject of one or more concerns rather than preserving their distinct
meanings.




Questions and Explanations 4