NICET LEVEL 3 HIGHWAY CONSTRUCTION NEWEST ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS)

NICET LEVEL 3 HIGHWAY CONSTRUCTION NEWEST ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) How should spare signal conductors be arraigned inside the box? - ANSWER -Spare conductors should be connected to a terminals. unused What should happen prior and during the installation of loops wires? - ANSWER -1. Clean saw cuts and remove debris by means of sandblasting, water blasting or wire brushing 2. Do not allow vehicles to drive over open cuts 3. Utilized plastic sleeves between joints How is loop wire required to be placed? - ANSWER -continuously What is placed ontop of continuous loop wires? - ANSWER -2' long Backer Rod What is the required wire slack amount left inside of pull box? - ANSWER -Minimum of 36" How long until subjected live load can be applied to anchor bolts? - ANSWER -Until concrete meets it required 28 day strength What type of pattern is recommended when tightening bolts? - ANSWER -The Star Pattern Prior to erection of traffic lights, What are the elements an inspector is looking for? - ANSWER -1.Bent or damaged parts 2. damaged coatings 3. Distortions 4. defective fabrication What elements of a traffic light assembly should be inspected prior to erection? - ANSWER -1.Posts 2. End Frames 3. Mast arms 4. Trusses How can light poles be erected? - ANSWER -Light poles and light supports can be assembled from the ground if they contain a short cantilevered arms. What are the inspection types for welds? - ANSWER -Magnetic Particle testing (MT) and dye-penetrant (PT) testing or ultrasonic testing What should be provided if conduit crosses a structural joint? - ANSWER -Metal expansion and deflection fittings What is the dimensions of the copper clad steel rods? - ANSWER -Rods should be 5/8th thick and 8' long. What are the size of micropiles? - ANSWER -Typically less than 12" What is the size of driven piles? - ANSWER -Between 12 and 36" What is the required surface temperature for painting a bridge? - ANSWER -Surface temps must be between 50 and 100 degrees When painting a bridge, what must be the humidity percentage be? - ANSWER -85% or less unless manufactures recommendations say otherwise When cleaning unsound paint, how far into the intact coat should you be? - ANSWER - Extend the prepared area at least 2 inches into adjacent tightly adhering, intact coating. When should primer be applied when painting a bridge? - ANSWER -. Only where paint is removed to bare metal. Otherwise, apply only intermediate and finish paints What do the color bonnets on fire hydrants mean? - ANSWER -Light Blue - 1,500GPM or above Green: GPM Orange: 500 - 999GPM Red: Less than 500 GPM What should be done to inoperable fire hydrants? - ANSWER -Fire hydrants should be wrapped or parts on the hydrant color black What should be done if a hydrant is 20GPM or below? - ANSWER -GPM should be stenciled on the fire hydrant caps and top. What is the working pressure rating for fire hydrants? - ANSWER -250PSI What do the fire hydrant body colors mean? - ANSWER -Red - Privately owned Yellow- Municipality Owned Light Purple- Non portable What should be placed and for how long when trial drilled shafts are being done? - ANSWER -Steel casing should be installed for 4 hours. Once the 4 hours is completed, the hole is filled with saturated sand. What do boring logs contain? - ANSWER -1. Type or rock/soil encountered 2. approx rate of seepage or groundwater encountered 3. equipment used/ equipment breakdowns completed 5. Difficulties experienced during drilling What does Dry Drilling Method consist of? - ANSWER -Removing acclimated water and loose material in a relatively dry environment What are the requirements for Dry Drilling Method? - ANSWER -1. 12" or less of water at the base of the hole for during a 1 hour period when a pump isn't permitted 2.Both sides and bottom of the hole remain stable with no signs of sloughing or swelling over a 4 hour period to completion 3. loose material and water is removed during inspection and prior to concrete placement What does Wet Drilling Method consist of? - ANSWER -Using water, slurry or mineral slurry to maintain hole stability during drilling operation What should be done if hole swelling, ground softening or slurry caking is encountered? - ANSWER -Steel casing is placed to maintain hole shape. What are the concrete placement equipment that is used for drilled shafts? - ANSWER -Tremies and concrete pumps. What is the free fall limitation when placing concrete for a drilled shaft? - ANSWER - Limited to 25' free fall limits for concrete. Contractor must ensure Concrete is placed in the middle of reinforcement cage and not segregating against rebar. What should be restricted when drilling a shaft? - ANSWER -Activities in 15' proximity or 3 drilled shaft diameter wide. Limit vibration and active loads in this radius. newly drilled shafts should remain undisturbed for 20 hours When sampling slurry, how many samples are taken and where are the samples taken from? - ANSWER -4 tests samples should be taken within 8 hours of slurry use. Samples should be take at the base of the drilled shaft and 10' above the base What is the acceptable amount of soil and water to be left in the drilled shaft prior to concrete placement? - ANSWER -1/2" of sediment and reduce water level to 3" or less When should Drilled Shaft be inspected prior to concrete placement? - ANSWER - Within 24 hours prior to concrete placement What are the levels of mineral and slurry should be maintained while drilling shafts? - ANSWER -Slurry level should be maintained at 5' and 10' with mineral slurry