NICET LEVEL 3 HIGHWAY CONSTRUCTION NEWEST 2024 ACTUAL EXAM 280 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+ After positioning sanitary pipe in place and filling the joint completely with joint filler when poured joints are used, what must you do before removing the runner? - ANSWER - Allow the sealer to cool completely. After backfilling sanitary pipe, what must you do to the lines? - ANSWER - Flush the lines with water to ensure they're unobstructed. When measuring sewer lines for payment, how should you measure? - ANSWER - Measure along the flow line including the length through valves, ells, tees, valve boxes, reducers, manholes or other fixtures. When installing paving geotextile and asphalt binder between pavement layers to form a waterproofing and stress relieving membrane, what should the minimum surface temperature be? - ANSWER - 55F degrees and rising. When applying asphalt binder to the pavement surface, what is the temperature range? - ANSWER - 290F to 325F What are the different types of sign structure inspections? - ANSWER - 1. Initial inspections 2. Routine inspections 3. In depth inspections 4. Interim inspections 5. Damage inspections How often should sign structures be inspected? - ANSWER - For problematic sign bridges with aluminum, it is recommended to inspect every 2 years. For cantilever and other non -redundant structures, a 4 year year frequency is recommended. What is a "Cantilever" sign structure? - ANSWER - A structure that extends over traffic and has a support on only one side of the roadway. What are the 3 methods of drilled shaft construction? - ANSWER - Dry shaft, wet shaft and cased shaft. What is a dry shaft? - ANSWER - A shaft excavation that can be excavated to its designed depth without the need for slurry or casing. The dry construction method is used at sites where the ground water level and soil and rock conditions are suitable to permit construction of the shaft in a relatively dry excavation and where the sides and bottom of the shaft may be visually inspected by the Engineer prior to placing the concrete. What is the Dry Shaft Construction Process? - ANSWER - The dry method consists of drilling the shaft excavation, removing accumulated water and loose material from the excavation, placing the reinforcement cage, and concreting the shaft in a relatively dry excavation. What is slurry? - ANSWER - Slurry is the fluid introduced into the excavation to assist in maintaining hole stability What are the 3 types of slurries in drilled shaft construction? - ANSWER - Mineral, Polymer and Water According to OSHA, how often should first aid kits be checked on site? - ANSWER - The contents of first aid kits must be inspected at least annually. When new traffic signals are fully operational, how long should they be tested? - ANSWER - With the signal in full operation, monitor the 24 hour operation testing for not less than 30 consecutive calendar days. What does NEMA stand for? - ANSWER - National Electrical Manufacturers Association True or False? Do not install traffic loops when pavement is wet? - ANSWER - True. What are the steps for installing traffic loops? - ANSWER - Saw cut, wire and seal for loop wires on the same day. Do not allow traffic to pass over an open saw cut unless protected. What are the key benefits of using a thin asphalt overlay? - ANSWER - The key benefits of a thin asphalt overlay are improved ride, corrected rutting, impermeability, and reduced noise. What does SSPC stand for? - ANSWER - The Society of Protective Coatings. How high should granular backfill of a standard under drain be placed above the top of the collector pipe? - ANSWER - 12 inches (1 foot)
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