FLORIDA UNDERGROUND UTILITY
CONTRACTOR FINAL EXAM 2026/2027
QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE
1. According to OSHA 29 CFR 1926 Subpart P, at what depth is a protective system required in
an excavation unless the excavation is made entirely in stable rock?
A. 5 feet
B. 4 feet
C. 3 feet
D. 6 feet
Answer: A
Conceptual Explanation: Per OSHA 1926.652(a)(1), each employee in an excavation shall
be protected from cave-ins by an adequate protective system, except when excavations are
less than 5 feet in depth and examination by a competent person provides no indication of
a potential cave-in.
2. Under Florida Statutes Chapter 489, an underground utility and excavation contractor is
NOT authorized to install which of the following?
A. Sanitary sewer systems
,B. Water distribution systems
C. Storm drainage systems
D. Fire line standpipes inside a building
Answer: D
Conceptual Explanation: The scope of work for an underground utility contractor
includes the construction and repair of systems outside of buildings. Installation of fire
standpipes inside a building generally falls under fire sprinkler or plumbing contractor
licenses.
3. When testing a pressurized water main, what is the standard minimum test pressure for a
hydrostatic test according to AWWA C600?
A. 100 psi or 1.25 times the working pressure, whichever is greater
B. 150 psi or 1.5 times the working pressure, whichever is greater
C. 200 psi
D. 50 psi above working pressure
Answer: B
Conceptual Explanation: AWWA C600 standards typically require hydrostatic testing at
150 psi or 1.5 times the working pressure, measured at the lowest point of elevation, to
ensure the integrity of the pipe and joints.
, 4. In soil classification, a ‘Type A’ soil has an unconfined compressive strength of:
A. 0.5 tsf or less
B. Greater than 0.5 tsf but less than 1.5 tsf
C. 1.5 tons per square foot (tsf) or greater
D. 3.0 tsf or greater
Answer: C
Conceptual Explanation: OSHA defines Type A soil as cohesive soil with an unconfined
compressive strength of 1.5 tons per square foot (tsf) or greater.
5. According to the Florida Greenbook, what is the minimum cover required for a water main
located under a flexible pavement roadway?
A. 36 inches
B. 24 inches
C. 30 inches
D. 18 inches
Answer: A
Conceptual Explanation: Standard practice in Florida (and common municipal
requirements) specifies a minimum cover of 36 inches (3 feet) for water mains under
roadways to protect against traffic loads and surface activities.
CONTRACTOR FINAL EXAM 2026/2027
QUESTIONS AND CORRECT ANSWERS
LATEST UPDATE
1. According to OSHA 29 CFR 1926 Subpart P, at what depth is a protective system required in
an excavation unless the excavation is made entirely in stable rock?
A. 5 feet
B. 4 feet
C. 3 feet
D. 6 feet
Answer: A
Conceptual Explanation: Per OSHA 1926.652(a)(1), each employee in an excavation shall
be protected from cave-ins by an adequate protective system, except when excavations are
less than 5 feet in depth and examination by a competent person provides no indication of
a potential cave-in.
2. Under Florida Statutes Chapter 489, an underground utility and excavation contractor is
NOT authorized to install which of the following?
A. Sanitary sewer systems
,B. Water distribution systems
C. Storm drainage systems
D. Fire line standpipes inside a building
Answer: D
Conceptual Explanation: The scope of work for an underground utility contractor
includes the construction and repair of systems outside of buildings. Installation of fire
standpipes inside a building generally falls under fire sprinkler or plumbing contractor
licenses.
3. When testing a pressurized water main, what is the standard minimum test pressure for a
hydrostatic test according to AWWA C600?
A. 100 psi or 1.25 times the working pressure, whichever is greater
B. 150 psi or 1.5 times the working pressure, whichever is greater
C. 200 psi
D. 50 psi above working pressure
Answer: B
Conceptual Explanation: AWWA C600 standards typically require hydrostatic testing at
150 psi or 1.5 times the working pressure, measured at the lowest point of elevation, to
ensure the integrity of the pipe and joints.
, 4. In soil classification, a ‘Type A’ soil has an unconfined compressive strength of:
A. 0.5 tsf or less
B. Greater than 0.5 tsf but less than 1.5 tsf
C. 1.5 tons per square foot (tsf) or greater
D. 3.0 tsf or greater
Answer: C
Conceptual Explanation: OSHA defines Type A soil as cohesive soil with an unconfined
compressive strength of 1.5 tons per square foot (tsf) or greater.
5. According to the Florida Greenbook, what is the minimum cover required for a water main
located under a flexible pavement roadway?
A. 36 inches
B. 24 inches
C. 30 inches
D. 18 inches
Answer: A
Conceptual Explanation: Standard practice in Florida (and common municipal
requirements) specifies a minimum cover of 36 inches (3 feet) for water mains under
roadways to protect against traffic loads and surface activities.
