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"Top NAB Exam Solutions: Complete Federal NHA Study Questions with Verified Answers"

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Uploaded on
February 4, 2025
Number of pages
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Written in
2024/2025
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Exam (elaborations)
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1. What does the term 'flexible pavement' refer to?

A. Pavement designed to adjust to changing traffic loads

B. Pavement made from recycled materials

C. Pavement built to withstand earthquakes

D. Pavement designed for heavy-duty construction vehicles

Answer: a) Pavement designed to adjust to changing traffic loads

Rationale: Flexible pavement consists of multiple layers, including asphalt,
that distribute traffic loads and adjust to changes in traffic patterns over
time.



2. What does the term 'design speed' mean in the context of highway
design?

A. The maximum speed allowed on a highway

B. The optimal speed for fuel efficiency

C. The speed for which the road is designed to be safe and efficient

D. The average speed of vehicles on the road

Answer: c) The speed for which the road is designed to be safe and efficient

Rationale: Design speed refers to the speed that is considered ideal for the
safe and efficient operation of vehicles on the road, based on factors like
curvature and elevation.



3. Which of the following is the primary objective of the 'road safety audit'?

A. To assess the durability of road surfaces

,B. To evaluate the safety of a road or highway design

C. To review the construction cost estimates

D. To improve aesthetic features of roads

Answer: b) To evaluate the safety of a road or highway design
Rationale: A road safety audit aims to identify potential hazards and
recommend improvements to enhance road safety for all users.



4. Which of the following is a method used for controlling traffic during
road construction?

A. Temporary traffic signs and barriers

B. Closing all lanes permanently

C. Allowing unrestricted access

D. Allowing only emergency vehicles

Answer: a) Temporary traffic signs and barriers
Rationale: Temporary traffic signs and barriers are used during
construction to redirect and control traffic flow while maintaining safety
for workers and drivers.



5. Which of the following is a major challenge in the maintenance of
national highways?

A. Managing fuel prices

B. Dealing with road congestion during peak hours

C. Repairing damage caused by weather conditions

D. Determining vehicle ownership

Answer: c) Repairing damage caused by weather conditions

, Rationale: Weather conditions, such as heavy rainfall, snow, or extreme
temperatures, can cause significant damage to roads, leading to a need for
regular maintenance and repairs.



6. What is a 'cut-and-fill' process in road construction?

A. A method to grade land by removing soil from higher areas and filling
lower areas

B. A technique for cutting down trees along the road

C. A process for creating decorative road signs

D. A method for installing road lights

Answer: a) A method to grade land by removing soil from higher areas and
filling lower areas

Rationale: The 'cut-and-fill' process is used in road construction to level the
terrain by removing material from higher areas (cut) and using it to fill
lower areas (fill).



7. What does the term 'traffic calming' refer to in road planning?

A. Increasing the speed limit on busy roads

B. Installing speed bumps and other measures to slow traffic

C. Redirecting traffic to smaller roads

D. Allowing trucks to drive at higher speeds

Answer: b) Installing speed bumps and other measures to slow traffic

Rationale: Traffic calming involves using physical measures like speed
bumps, roundabouts, and road narrowing to slow down traffic and enhance
safety, especially in residential areas.

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