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IMSA Signal Construction Practice Questions - IMSA Traffic Signal Construction Technician Level II Certification Exam Exam
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Question
1
of 25
QUESTION 1 / 25
What is the minimum recommended embedment depth for a drilled shaft foundation supporting a traffic signal mast arm pole?
Choose one answer below.
A
4 feet
✓
B
6 feet
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C
10 feet or as specified by engineering design
✓
D
2 feet
✓
QUESTION 2 / 25
Before beginning any excavation for a traffic signal foundation, what is the FIRST required step?
Choose one answer below.
A
Set up traffic control devices
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B
Contact 811 to request utility locates
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C
Obtain the building permit
✓
D
Deliver materials to the job site
✓
QUESTION 3 / 25
What type of conduit is most commonly used for underground traffic signal cable runs between the controller cabinet and signal poles?
Choose one answer below.
A
Flexible metal conduit (FMC)
✓
B
Electrical metallic tubing (EMT)
✓
C
Schedule 40 or 80 PVC conduit
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D
Aluminum conduit
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QUESTION 4 / 25
When installing rigid metal conduit (RMC) underground for a traffic signal installation, what is the minimum burial depth required by the NEC?
Choose one answer below.
A
6 inches
✓
B
12 inches
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C
6 inches under rigid metal conduit; 18 inches under PVC
✓
D
6 inches for RMC per NEC Table 300.5
✓
QUESTION 5 / 25
What is the primary purpose of a pull box (junction box) in a traffic signal conduit system?
Choose one answer below.
A
To provide a ground connection point
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B
To facilitate cable pulling and provide access for splicing or future maintenance
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C
To house the traffic signal controller
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D
To store spare cable
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QUESTION 6 / 25
When pulling cable through conduit, what is the maximum recommended pulling tension for copper signal cable?
Choose one answer below.
A
There is no limit as long as the cable is intact
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B
The tension must not exceed the cable manufacturer's specified maximum pulling tension
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C
100 pounds regardless of cable size
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D
50 pounds for all cable types
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QUESTION 7 / 25
What lubricant should be used when pulling cables through conduit in traffic signal construction?
Choose one answer below.
A
Motor oil or grease
✓
B
UL-listed cable pulling lubricant compatible with cable jacket material
✓
C
Dish soap mixed with water
✓
D
No lubricant should ever be used
✓
QUESTION 8 / 25
When erecting a traffic signal mast arm pole, what must be verified BEFORE the crane lifts the pole?
Choose one answer below.
A
The signal heads are already mounted on the mast arm
✓
B
The anchor bolts are properly aligned, plumb, and at the correct projection height
✓
C
The controller cabinet is operational
✓
D
The detection loops are installed
✓
QUESTION 9 / 25
What is the standard bolt circle pattern used for most traffic signal mast arm pole base plates?
Choose one answer below.
A
A square pattern with bolts at the corners
✓
B
A circular pattern with bolts evenly spaced around a specified bolt circle diameter
✓
C
A triangular pattern with three bolts
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D
A random pattern determined by the installer
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QUESTION 10 / 25
What type of foundation is typically used for a traffic signal pedestal pole at a minor intersection?
Choose one answer below.
A
Drilled shaft foundation
✓
B
Driven pile foundation
✓
C
Spread footing foundation
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D
Helical pier foundation
✓
QUESTION 11 / 25
What is the purpose of the leveling nuts on traffic signal pole anchor bolts?
Choose one answer below.
A
To prevent the pole from being stolen
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B
To level the base plate and set the proper height above the foundation
✓
C
To connect the grounding conductor
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D
To hold the conduit in place
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QUESTION 12 / 25
When mounting a signal head on a mast arm, which mounting method allows for vertical and horizontal adjustment?
Choose one answer below.
A
Fixed bracket mount
✓
B
Adjustable hanger with swivel fitting
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C
Direct bolt mount
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D
Cable suspension only
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QUESTION 13 / 25
What is the MUTCD-required minimum mounting height for a signal head over a roadway?
Choose one answer below.
A
10 feet
✓
B
15 feet
✓
C
17 feet for mast arm mounted signals
✓
D
20 feet
✓
QUESTION 14 / 25
Inductive loop detectors are installed in the pavement by:
Choose one answer below.
A
Drilling holes and inserting probes
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B
Sawcutting slots in the pavement, placing wire loops, and sealing with loop sealant
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C
Gluing sensors to the pavement surface
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D
Embedding radar units in the road surface
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QUESTION 15 / 25
What is the standard sawcut depth for installing an inductive loop detector in asphalt pavement?
Choose one answer below.
A
1/2 inch
✓
B
1.5 to 2 inches
✓
C
4 inches
✓
D
Surface mount only; no sawcutting
✓
QUESTION 16 / 25
What is the standard loop configuration for a 6-foot by 6-foot inductive loop detector?
Choose one answer below.
A
Single turn of wire
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B
Three to four turns of wire
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C
Ten turns of wire
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D
A single straight wire across the lane
✓
QUESTION 17 / 25
What type of sealant is used to protect inductive loop wires in pavement sawcuts?
Choose one answer below.
A
Standard asphalt crack filler
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B
Rubberized or epoxy loop sealant specifically designed for loop installations
✓
C
Portland cement grout
✓
D
Silicone caulk
✓
QUESTION 18 / 25
What is the purpose of the transformer base on a traffic signal controller cabinet?
Choose one answer below.
A
To step down voltage from 480V to 120V
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B
To provide a raised, level mounting platform and allow conduit entry from below
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C
To house the backup battery system
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D
To serve as the main grounding electrode
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QUESTION 19 / 25
What is the minimum ground rod length required by the NEC for a traffic signal cabinet grounding electrode?
Choose one answer below.
A
4 feet
✓
B
6 feet
✓
C
8 feet
✓
D
10 feet
✓
QUESTION 20 / 25
When bonding metal signal poles to the grounding system, what size copper conductor is typically required?
Choose one answer below.
A
#14 AWG
✓
B
#10 AWG
✓
C
#6 AWG or as specified by design
✓
D
#2 AWG
✓
QUESTION 21 / 25
What is the minimum concrete compressive strength typically specified for traffic signal foundations?
Choose one answer below.
A
2,000 PSI
✓
B
3,000 PSI
✓
C
3,500 to 4,000 PSI
✓
D
6,000 PSI
✓
QUESTION 22 / 25
When placing concrete for a drilled shaft foundation, what method is used if groundwater is present in the shaft?
Choose one answer below.
A
Bail out all water and pour concrete dry
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B
Use tremie placement method to place concrete from the bottom up
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C
Add water to the concrete mix to compensate
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D
Delay the pour until groundwater recedes
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QUESTION 23 / 25
What is the minimum curing time for concrete foundations before anchor bolt nuts can be torqued and the pole erected?
Choose one answer below.
A
24 hours
✓
B
3 days
✓
C
7 days or as specified by the engineer
✓
D
28 days
✓
QUESTION 24 / 25
OSHA requires that all excavations deeper than what depth must have cave-in protection?
Choose one answer below.
A
3 feet
✓
B
4 feet
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C
5 feet
✓
D
6 feet
✓
QUESTION 25 / 25
Who is the designated person responsible for inspecting excavations and determining the soil type at a traffic signal construction site?
Choose one answer below.
A
The project manager
✓
B
The OSHA inspector
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C
The competent person
✓
D
The equipment operator
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