Nicet Highway Construction Level 2 Questions and Answers Already Passed

Nicet Highway Construction Level 2 Questions and Answers Already Passed What are the 5 types of bridge abutments? Closed Abutment, Stub or Perched Abutment, Pedestal or Spill-through Abutment, Integral End Bents, Mechanically Stabilized Abutment What is a "closed abutment"? A closed abutment is a full-height wall with wing walls on each side that retains the full height of the approach embankment. This type of abutment minimizes the required span length of the bridge. What is a stub or perched abutment? A stub or perched abutment is a relatively short abutment that is constructed after the embankment has been completed. The embankment can be compacted without interference from the abutment. What are Pedestal or spill-through abutments? Pedestal or spill-through abutments are short stub-type abutments supported on pedestals or columns extending to the natural ground. As with closed abutments, the abutment must be constructed before the approach embankment. What are Integral End Bents? Integral end bents are stub abutments that are rigidly connected to the superstructure without expansion joints. The connection is designed for full transfer of thermal stresses from the bridge deck to the abutment. What is a Mechanically Stabilized Abutment? Mechanically stabilized walls, also have been used to support bridge abutments. The bridge seat and footing are supported directly on the reinforced backfill. What is a bridge abutment? A bridge abutment is a substructure that supports one terminus of the superstructure of a bridge and, at the same time, laterally supports the embankment which serves as an approach to the bridge. On a rural highway, the construction sign should be placed how far away from the pavement? 6 to 12 feet When casting concrete cylinders, the cylinders shall be fabricated within how many minutes of sampling? 3 minutes What apparatus is required when using a standard method to determine air content by volumetric method? A mallet, a hemispherical tipped tamping rod and a syringe. The sealer for protective treatment of concrete pavement can be applied with no harmful effect even if the concrete is: Still green. How much weight should safety railing support? 200 lbs in any direction. How thick must top rails and mid rails be on guardrail? At least 1/4" thick According to OSHA requirements, how far above the walking surface does a top rail on a guardrail have to be? Between 39" and 45" T/F A critical path method means how fast a project can be completed. It does not include any float days. True What is the accepted surface deviation for Portland Cement Base Course when using a 10 foot straight edge? 1/4" Plans require a 42" high fence. If the posts are 6' long, how much of the post is in the ground? 30" To eliminate the necessity for a minimum of 8 passes for proper asphalt compaction, the best type of roller for sub-base is: Vibratory Drum What is the most common test for determining the density of a material? Modified Proctor The protective membrane for a structure must be applied with 20% overlap. The bridge deck surface is 173' x 41'. Each roll contains 1000 Sq Ft. How many rolls of membrane (to the nearest roll) must be ordered? A= 9 rolls 20% of each roll overlaps. Therefore, to cover the full bridge deck, you would need 9. 1000/20% = 800 feet What is the best treatment for unstable soil in a roadway slope? Excavate the unstable soil and place a granular blanket on the area. The normal application rate of commercial fertilizer when used on flat areas is ______lbs per acre 800 lbs The purpose of providing dust palliative as a miscellaneous quantity on a grading project is to: Control dust nuisance to the traveling public and adjacent property owners. How would you normally pay a contractor to clean a pipe of construction silt near the completion of a project prior to acceptance? You don't pay for this work. An inspector can find the requirements for the project compliance with environmental consideration from: Plans, specifications and contract documents. A section of highway rises 18 feet in a mile. This is a _______% grade 1 mile = 5280 feet 18/5280 = .34% Report the concrete slump test to the nearest _____ inch. .25 (1/4 inch) When rodding a second or third layer, the rod must penetrate approximately _______ inch into the previous layer. 1 Where is the thickness of aggregate surface specified? Cross Section Sheets Why are the line braces installed in long sections of fence? To retain tension at elevation changes. What instrument is used to determine the area of a Topo Map? Plainmeter The farther contour lines are apart, the _____________ the slope. Flatter or less T or F? When determining elevation of an Intermediate Contour line always start at the furthest Index Contour line. False. Start at the closest Index Contour T/F? Slope & drainage is always calculated parallel to the contour lines. False. Perpendicular. In asphalt construction, it is most difficult to obtain a representative test sample from? Open graded. Trees to be saved within the R-O-W should be marked by? The Construction Engineer. Grubbing includes? Removal of stumps, roots and stubs. Before beginning earthwork, it is important to? Verify location of underground utilities through local one call system. When backfilling culverts and storm drains, lifts are not to exceed? 6 inches. Backfill for pipes and culverts consist of? Granular materials. For fences erected on a slope, the posts are to be set in what position? Plumb Plans required a 42" high fence. If the posts are 6' long, how much of the post is in the ground? 6' x 12 = 72 72" - 42" = 30" Fence corners are strengthened by? Horizontal post and tension wire. What is important when inspecting concrete barrier? Alignment Guardrail is 25' long. What is the center spacing of the posts if mounted on 8 posts? 8 posts means 7 spaces. 25' / 7 = 3.57' A girder measures 100' by 36" with flanges 12" wide. What is the surface area of the girder to the nearest SF? 100' x 3' x 2 sides = 600 SF 12" x 2 (top and bottom) x 100' x 2 Flanges = 400 SF Total - 1000 SF Paint weighs 20lbs per gallon. If a bridge requires 200 lbs of paint and so far only 125 lbs of paint has been applied, what is the percentage completed? 125 divided by 200 = .625 (or 62.5% complete) What is the protective surface treatment for a concrete bridge deck? White membrane curing compound. What is the purpose of using vibrators in concrete? Consolidation Sealer treatment can be applied without being hard, even if the concrete is? Still green Excessive vibration of concrete causing the top to become white, chalky and non durable is called? Laitance The main reason for applying liquid membrane forming compound on concrete is? Preventing loss of water during early curing. The main reason for white reflective concrete covering is? Reduce temperature in concrete and reflect the sun's heat. What does a screed do? Removes excess concrete from the surface of freshly placed concrete. If told in the above problem the specifications requires a 30% increase in the quantity for the protective coating, how many gallons are required? 84.4 gallons x 1.30 = 109.75 gallons Concrete pipe should be placed? With the bell end of the pipe at the upstream end. When installing concrete pipe, install? Downstream to upstream. A culvert is labeled CMPA. What does CMPA stand for? Corrugated Metal Pipe Arch Culvert Why is it important to keep trench width consistent with the specs? Larger trench widths increase cost. A pipe's invert elevation at the inlet is 153.5. A 100 ft run of pipe is to be installed at a -2.0% grade. What is the elevation at the end of the pipe run? 100 x 0.02 = 2' 153.5 - 2.0 = 151.5' What are the ACI testing procedures? Temp, Air by Volumetric method, Air Content by Pressure method, Slump, Unit Weight and Cylinders. Sum four distances: 66 ft + 6.600 ft + 66 inches + 6.6 inches 78.65 fT What does the letter "D" mean if referring to the alignment of a road? Degree of curvature. Regulatory Traffic Signs are typically? Black letters on white background. The sides of trenches need to be shored, braced or sloped if the excavation exceeds? 5 feet The contractor is responsible for which OSHA requirements? All What document is a standard for design and construction of traffic control? MUTCD OSHA requires nets to be placed under work when work is how many feet above the ground or water? 25 Feet The standard height of Type 1 and Type II construction barricades is? 3 Feet The minimum height of construction signs on a temporary movable support is? 6 Feet Where should advanced construction warning signs be placed on a highway? 1 Mile How do you best relieve the pain of a first and 2nd degree burn? Soak in cold water A tandem 2 wheel roller used for compacting asphalt weighs approximately? Varies from 2-8 tons. An asphalt mix may flatten in a truck during delivery due to? Excessive asphalt in the mix or if the mix is too hot. A stiff asphalt mix is caused by? The mix being too cold. After the project no longer needs temp pavement markings, what should be done with them? Temporary pavement marking should be eradicated and permanent markings should be installed. What is an inspector to do after the contractor has placed signage to route traffic on a temporary rd? Record the signage, compare against the plans and continue to check the signage regularly. Fertilizer application rate for a flat surface is how many lbs per acre? Check the spec. 800lbs per acre How can a contractor assure that there will be adequate amounts of topsoil on a job? Through the use of Cross-Sections. Compare current Cross Section condition and compare against the original. When stockpiling topsoil on a site, stockpiles should? Keep away from trees, away from drainage and in a centrally located location. Clearing and grubbing on a rural 2 lane highway will normally be paid by? Acres The beam supporting the masonry over an opening in a wall is? Lintel What measures surface irregularities on a gauge as it is pushed along the surface? Rolling straight edge The requirements for compliance with environmental consideration can be found? Contract documents, plans and specs In ACI concrete testing, what are the measurements for the base and the top of a slump cone? 8" for the base and 4" for the top According to ASTM 143, how much time do you have to raise your slump cone? 5 seconds plus or minus 2 seconds Which size tamping rod do you use when performing a slump test? 5/8” diameter How long should the concrete slump test take? 2 minutes 30 seconds How many times do you rod each layer of concrete during a slump test? 25 times True or false: You should not tap the side of the cone after each layer of concrete during a slump test? True The maximum allowable time between obtaining the first and final portions of a composite sample is _________minutes 15 After all concrete samples have been transported to the place where tests are to be performed; the samples must be _____________________ and _____________________with a __________________ to ensure uniformity combined, remixed, shovel To protect concrete from contamination or an absorptive subgrade when being discharged from a paving mixer, three shallow pans may be placed on the subgrade to collect the samples. True or False True The sample shall be __________ __________________ when the concrete contains aggregate larger than that appropriate for the molds or equipment. wet-sieved The temperature measuring device may be removed from the concrete for reading. True or False False Report the slump to the nearest __________ inch .25 Wet sieving is permitted when using density method. True or False True The tamping rod length must be at least _________ inches greater than the depth of the mold being used but not greater than __________ inches 4, 24 The required frequency of the vibrator used in the density test method is at least _______________ vibrations per minute 9000 If rodding is the method of concrete consolidation, the measure must be filled in _________ approximately equal layers 3