NETTCP Roadway Design & Maintenance 4

Question 1

What type of retaining wall relies on the weight of the wall itself and retained soil for stability against overturning?

Accepted Answer

Gravity retaining wall

Answer

A gravity retaining wall uses its own mass and the weight of soil bearing on it to resist overturning and sliding forces without reinforcement.

Question 2

When designing roadway grades in New England, which factor is especially critical due to the regional climate?

Accepted Answer

Grade and drainage design to prevent ice accumulation and black ice formation

Answer

New England's freeze-thaw climate makes drainage and grade design critical to prevent water pooling that freezes into dangerous black ice conditions.

Question 3

A highway agency is evaluating a section of roadway for mill and overlay. What pavement condition primarily DISQUALIFIES a section from this treatment?

Accepted Answer

Severe structural (alligator) cracking indicating base failure

Answer

Severe alligator cracking indicates base failure, meaning an overlay alone will not correct the structural deficiency and full-depth reclamation or reconstruction is needed.

Question 4

What is the purpose of a rumble strip installed on the centerline of a two-lane highway?

Accepted Answer

To alert drowsy or inattentive drivers drifting across the centerline

Answer

Centerline rumble strips create audible and tactile warnings that alert drivers who drift across the centerline toward oncoming traffic.

Question 5

Which drainage structure is BEST suited to pass a high-volume stream beneath a roadway while allowing natural stream-bed migration and wildlife passage?

Accepted Answer

Open-bottom arch culvert or bridge

Answer

Open-bottom arches or bridges preserve the natural stream bottom, accommodating stream migration and wildlife passage that closed culverts prevent.

(NETTCP) New England Transportation Technician Certification Program Practice Test

(NETTCP) New England Transportation Technician Certification Program Practice Test

NETTCP Roadway Design & Maintenance 4