nicet highway construction level 3 new version actual exam questions and correct detailed Answer s

nicet highway construction level 3 new version actual
exam questions and correct detailed Answer s




NICET Highway Construction Level III Practice Questions
Traffic Loops and Signals
Question 1
During installation of traffic loops in the pavement, which three statements apply
prior to and during the installation of loop wire? (Choose 3)
A) Do not allow vehicular traffic over an open saw cut.
B) Do not overlap saw cuts at the corner.
C) Thoroughly clean the saw cut of foreign material.
D) Use a plastic sleeve where loop wire crosses a joint.
Correct Answer-: : A, C, D
Explanation: During traffic loop installation, three critical requirements must be
followed: (1) vehicular traffic must not be allowed over open saw cuts to prevent
damage to the cut edges and maintain cut integrity; (2) saw cuts must be
thoroughly cleaned of foreign material to ensure proper epoxy bonding and loop
performance; and (3) plastic sleeves must be used where loop wire crosses joints
to protect the wire from damage during pavement movement. Option B (do not
overlap saw cuts at the corner) is not a standard requirement.


Question 2
How many times per foot should loop lead-in wires be twisted?
A) 3 turns per foot
B) 5 turns per foot ✓

,C) 6 turns per foot
D) 7 turns per foot
Correct Answer-: : B) 5 turns per foot
Explanation: Loop lead-in wires must be twisted 5 turns per foot to cancel
electromagnetic interference and ensure proper loop detector operation.
Untwisted or insufficiently twisted wires can cause false calls, detector
malfunction, and unreliable vehicle detection.


Question 3
How are lights and luminaires controlled?
A) Loop detectors
B) Meter cabinet
C) Photocells ✓
D) Timer
Correct Answer-: : C) Photocells
Explanation: Photocells sense ambient light levels and automatically turn lighting
on at dusk and off at dawn. While timers may be used as a secondary control
method, photocells are the primary automatic control device for highway lighting
systems.


Question 4
What is the purpose of police units in regards to work zone traffic control?
A) Ease of setting up traffic sobriety checkpoints
B) Give the workers the feeling of security
C) Heighten the awareness of passing motor vehicle traffic and improve safety ✓
D) Use traffic violations to generate revenues
Correct Answer-: : C) Heighten the awareness of passing motor vehicle traffic
and improve safety

,Explanation: Police presence in work zones significantly reduces vehicle speeds
and increases driver alertness, improving safety for both workers and motorists.
The visible enforcement presence heightens awareness and encourages
compliance with work zone speed limits and traffic control devices.


Question 5
How must spare signal conductors inside the cabinet be arranged?
A) Left hanging in the controller
B) Connected to an unused terminal ✓
C) Connected to ground rod
D) Connected to the neutral buss
Correct Answer-: : B) Connected to an unused terminal
Explanation: Spare signal conductors must be connected to an unused terminal to
keep them organized, prevent loose wires from causing shorts or interference,
and maintain a neat and workable cabinet interior. Loose hanging wires can
create safety hazards and maintenance difficulties.


Question 6
After installation of wiring for each electrical system and before making
corrections, which of the following test must be performed on each circuit using
suitable equipment?
A) Amperage, ground, and polarity
B) Continuity, ground, and insulation resistance to ground ✓
C) Fault, ground, and amperage
D) Wire, polarity, and continuity
Correct Answer-: : B) Continuity, ground, and insulation resistance to ground
Explanation: Before energizing any electrical system, circuits must be tested for
continuity (ensuring complete circuit paths), proper grounding (safety), and
insulation resistance to ground (detecting potential shorts or insulation

, breakdown). These tests verify system integrity and safety before connection to
power.


Question 7
To properly identify cables, the cable jackets must be marked at approximately 2-
foot intervals. Which two pieces of information are required to be marked on the
cable jackets? (Choose two)
A) Name of project
B) Permitted uses
C) Voltage rating ✓
D) Year manufactured ✓
Correct Answer-: : C) Voltage rating and D) Year manufactured
Explanation: Cable jackets must be marked with voltage rating (for electrical
safety and identification) and year manufactured (for age tracking and warranty
purposes). This information helps installers and inspectors verify correct cable
specifications and track cable age for replacement planning.


Culverts and Drainage
Question 8
The contractor is installing a culvert with a 12-inch reinforced concrete pipe
(outside diameter of 16.50 inches) from Sta 10+00, 40 feet Left to STA 10+00, 65
feet Right on 4-inch bedding material. The 12-inch RCP outlet is to be installed at
Sta 10+00, 40 feet Left at an invert elevation of 652.50.
If the conduit is installed at a 1.40% slope, what is the elevation of the foundation
grade at Sta 10+00, 45 feet Right?
A) 652.04
B) 653.17
C) 653.36
D) 653.50
Correct Answer-: : C) 653.36