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NICET LEVEL 1 HIGHWAY CONSTRUCTION
NEWEST 2024 /20 25 ACTUAL EXAM 160 QUESTIONS
AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) |ALREADY
GRADED A+
Flourine has an atomic weight of 19 and an atomic number of 9. What is the number of neutrons in the atomic nucleus? - ANSWER>> 10 An atom has 30 protons and 35 neutrons in its nucleus. It has 30 electrons in its shells. Its atomic weight would be? - ANSWER>> 65 Backfill for use around culverts and pipes consists of - ANSWER>>Granular materials An inspector looks through one end of a drainage pipe. He is most likely checking - ANSWER>>Alignment of the pipe An important consideration in excavation for drainage is the trench width. Why is it important to keep the trench width to that which is called for by the specifications, and not larger? - ANSWER>>Larger trench widths mean more backfill material, which increases costs. The main purpose of sampling any material is? - ANSWER>>Obtain a small part of a lot to represent the whole. What is the water cement ratio? - ANSWER>>Weight of water/weight of cement Wet sieve - ANSWER>>Used to separate fine grain from coarse grain. It carried out by washing the soil specimen on a 60pm sieve mesh.
In soil testing the test used to determine the ratio of the weight of a given volume of material to the weight of an equal volume of water is known as? - ANSWER>>Density check Slump test of concrete test all but which one of the following? Water cement ratio, admixture content, strength, durability/workability, water content. - ANSWER>>Strength For a concrete slump test how is the cone to be filled with concrete? - ANSWER>> 3 equal layers according to volume How is the bearing of a line notated? - ANSWER>>S 23° 30' E Horizontal distances over sloping ground are usually determined by? - ANSWER>>Surveying tape and plumbing bob A distance between two points 300' apart is measured on a hot day. The tape will show a length greater than or less than 300'? - ANSWER>>Less A road has a grade of 2.0% with an elevation of 1252.00 at station 450+20. What is the elevation at station 455+30? - ANSWER>> 45530 - 45020 = 510' 510 x 0.020 = 10.2' 1252.0 + 10.2 = 1262. Answer is 1262. What is the varnier on a leveling rod used for? - ANSWER>>Used to determine the subdivision of the smallest division of a scale. What is the proper tension for a 100' steel tape? - ANSWER>> 25 pounds When measuring with a steel tape a sag is detected. What will the reading be? - ANSWER>>Too large
What is the volume of a cone in cubic feet? Dimensions are 6" diameter, and 10" height? - ANSWER>>Come volume = πr^2h/ =π(.5/2)^2(0.83)/ =0.054 cf. What is the volume of 6' diameter sphere in cubic feet? - ANSWER>>Sphere volume = 4πr^3/ =4π3^3/ =113 cf. Solve the following equation if A=6, B=3, C=21: X=√A^2+B^2+C^2 - ANSWER>>X=√(6^2)+(3^2)+(21^2) X= What is the proper order of arithmetic operations? - ANSWER>>PEMDAS (x+4)(x+9)=? - ANSWER>>Use FOIL method, first outer, inner last; x^2+9x+4x+ x^2+13x+ 25% of what number is 10? - ANSWER>>10/.25= 40 is 80% of what number? - ANSWER>>40/.80= 144 inches squared - ANSWER>>1 foot squared 9 feet squared - ANSWER>>1 yard squared 1 mile = feet - ANSWER>>5,280 feet 1 cubic yard = cubic feet - ANSWER>>27 cubic feet
Convert 9,567 feet to miles? - ANSWER>>9,567/5,280=1.81 miles Convert 5 miles to yards? - ANSWER>>5 x 5,280 = 26,400 feet 26,400/3' = 8,800 yards Convert 82°F to Celsius? - ANSWER>>C=(F-32)/1. C=(82-32)/1. C=27.78°C Convert: 32° C to °F - ANSWER>>F=1.8°C+ F=1.8(32)+ F=89. Convert 120° to radians? - ANSWER>>120(2π/360)=2.094 radians Convert 2.094 radians to degrees? - ANSWER>>2.094/(2π/360)=120° Convert 6.89° to degrees minutes and seconds? - ANSWER>>0.89 x 60=53. 0.4 x 60= = 6° 53' 24" Convert 6° 53' 24" to degree decimal? - ANSWER>>=24/60=0. =(53+0.4)/60=0. =6.89° Which is correct? Children's/childrens' Men's/mens' - ANSWER>>Children's Men's
When compacting bituminous concrete with tandem two wheel or three wheel rollers, what is the weight of the rollers? - ANSWER>>10-15 tons What part of roadway construction is a sheepsfoot roller used? - ANSWER>>Compaction of embankment In asphalt construction, it is most difficult to obtain a representative test sample from? - ANSWER>>Open graded What is the accepted surface deviation for Portland cement base course when using a ten foot straight edge? - ANSWER>>3/4". This answer can be found in the specification. Trucks can haul 10 tons per load to a site where gravel is to be spread 8" deep over a 50 yard length of a 30' wide road. How many loads will be needed if the gravel weight 2,500 pounds per cy? - ANSWER>>Volume=(8/12)x(50x3)x30=3,000 CF 3,000/27=111.1 CY 111.1 CY x 2,500 lbs = 277,750 lbs. 277,750/2000 = 138.9 tons 138.9/10 = 13.9, say 14 loads. Cleaning of a work area is complete when? - ANSWER>>Timber, rubbish and marked structures are removed. Trees to be saved within the right of way should be marked by? - ANSWER>>The construction engineer Grubbing includes? - ANSWER>>Removal of stumps, roots and stubs. Before beginning earthwork it is important to? - ANSWER>>Verify location of underground utilities through local one call system.
What is a mass haul diagram? - ANSWER>>A graphical representation of the cumulative amount of earthwork moved along the centerline and distances over which the earth and materials are to be transported. It tells contractors and inspectors the quantity of material moved and how far it can be economically moved. When backfilling Culver's and storm drain, lifts are not to exceed? - ANSWER>> inches Backfill for pipes and culverts consist of? - ANSWER>>Granular materials A project requires 250,000 CY of offsite borrow at $2.25/CY and 300,000 CY of on-site excavation at $1.75/CY all with special compaction bid at $0.25/CY. What is the total payment for the work? - ANSWER>>(250,000x2.25)+(300,000x1.75)+ (550,000x0.25)=$1,225, For fences erected on a slope the post are to be set in what position? - ANSWER>>Plumb Plans required a 42" high fence. If the post are 6' long, how much of the post is in the ground? - ANSWER>>6'x12"=72" 72"-42"=30" Fence corners are strengthened by? - ANSWER>>Horizontal post and tension wire. If plans show 35 stations of fence, how many linear feet of fence is required? - ANSWER>>35x100'=3,500' Why are line braces installed in long sections of fence? - ANSWER>>To retain tension at elevation changes. What is important when inspecting concrete barrier? - ANSWER>>Alignment
Excessive vibration of concrete causing the top to become white chalky and nondurable is called? - ANSWER>>Laitance The main reason for applying liquid membrane forming compound on concrete is? - ANSWER>>Prevent loss of water during early curing. The main reason for white reflective concrete covering is to? - ANSWER>>Reduce temperature in concrete and reflect the suns heat. What does a screed do? - ANSWER>>Removes excess concrete from the surface of freshly placed concrete. A protective treatment is applied to a bridge deck that is 70'x135'. The rate of application is 0.075 gal/sy. What is the amount of gallons that are required? - ANSWER>>75x135=10,125 sf/9=1,125 sy. 1,125 sy. x 0.075 = 84.4 gallons If told in the above problem the specifications requires a 30% increase in the quantity for the protective coating how many gallons required? - ANSWER>>84.4 gallons x 1.30=109.75 gallons A membrane is applied with a 30% overlap. The bridge deck surface is 150'x50'. Each roll of membrane is 400 sf. How many rolls must be ordered? - ANSWER>>150' x 50,=7,500 sf. 7,500 x 1.3=9,750 sf. 9,750/400=24. =25 rolls Concrete pipe should be placed? - ANSWER>>With the bell end of the pipe at the upstream end.
When installing concrete pipe, install? - ANSWER>>Downstream to upstream. When installing a culvert, work should begin? - ANSWER>>Begin at downstream end. A culvert is labeled CMPA. What does CMPA stand for? - ANSWER>>Corrugated metal pipe arch culvert Why is it important to keep the trench width consistent with the specs? - ANSWER>>Larger trench widths increase cost. By looking through one end of a pipe an inspector is able to check for? - ANSWER>>Alignment Given: Sta. Volume ft^ 1+50 210 2+00 150 2+50 275 What is the volume of the ditch in CY from sta. 1+50 to 2+50? - ANSWER>>210+150/2= 180x50'=9,000 ft^ 150+275/2=212. 212.5x50'=10,625 ft^ (9,000+10,625)/27=727 CY A pipes 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? - ANSWER>>100x0.02=2' 153.5-2.0=151.5'
The title or key sheet is - ANSWER>>The first sheet in a set of project plans It is an introductory sheet to the project that identifies the: - ANSWER>>Project name and number, location of the project, index to all sheets in the plan set, length of the project, specifications under which the project is to be built, states whether traffic is to be maintained or detoured, lists standard construction drawings and supplemental specifications, contains the signature of approval by the proper officials. Plan and profile sheets show - ANSWER>>Construction of the highway from two views The top half of the sheet shows - ANSWER>>Plan view and the bottom half shows a profile view Sometimes, an entire sheet may be required just to show - ANSWER>>the plan view, and a separate sheet may be required for the associated profile views Typical section sheets show the - ANSWER>>Different layers of the road and the side slopes and ditches for a particular given length. This view is as if the road was cut full depth perpendicular to center-line. If the project was small and very simple it may have only one typical section. However, most roads, have several typical sections. Typical sections are viewed looking upstation. Typical section sheets show - ANSWER>>Cross-section views at specified points along the proposed roadway. They will show the existing ground line and will super-impose the proposed roadway over the existing. Typical sections provide a cross-section view/picture of what the roadway will look like. Summary of quantities sheets - ANSWER>>This sheet will show in a table the quantities of all the construction pay items anticipated for the complete construction of the roadway. These quantities are based on the final design estimate by the designer. These quantities will be used in creating the schedule of the materials sampling plan.
Plan details - ANSWER>>A detail is a view of a very specific item of work. It can be a plan view, but most likely will be a cross-section view. N.T.S. means not to scale. What is the diameter of a #4 rebar? - ANSWER>>Divide the #4 by 8 to get the diameter. 4/8=0.5" or 1/2" What is the diameter of a #6 rebar. - ANSWER>>Divide the #6 by 8 to get the diameter. 6/8=0.75" or 3/4" T/F Typical section sheets show elevation views of the proposed road. - ANSWER>>False: profile sheets T/F The directional arrow is found on the profile sheet. - ANSWER>>False: plan sheets or key sheet The shape of the roads side slopes and ditches are found on what sheet? - ANSWER>>Typical section sheets What sheet depicts the cross-section view of the road superimposed on the natural ground line? - ANSWER>>Cross-section sheets Construction drawings are typically drawn to SCALE. This means that - ANSWER>>Lines on the plans are drawn to an exact length or a dimension. AVOID trying to measure distances on plan sheets with a ruler: look for a - ANSWER>>Written dimension, or calculate from written figures first.
Most highway and bridge projects do not start at - ANSWER>>0+ When a specific construction item is described in the plans, the exact location is defined by a - ANSWER>>Station number The location of any point is always shown as a plus distance in feet beyond the - ANSWER>>Last station Sta. 32+35 would mean a point? feet ahead (or up-station) of station 32+00. And station 32+00 is back-station of 32+35. - ANSWER>> Sta. 98+76.50 would mean a point? feet ahead (or up-station) of station 98+00. And station 98+00 is back-station of 98+76.50. - ANSWER>>76. Typically stations increase from the? to the? or from the? to the ?. - ANSWER>>West to the east South to the north To find the distance between stations along the surveyed line... - ANSWER>>Subtract the lower station from the higher station (omit the "+" sign). The distance between sta. 25+34 and 37+16.50=1,182.50' - ANSWER>>(3,716.50- 2,534) which is 1,182.50' As a check: 1,182.50'+2,534=3,716.50 (37+16.50) Sta. 21+00 is what distance from sta. 23+00? - ANSWER>>200 feet Is 21+00 up-station or back-station from 23+00? - ANSWER>>Back-station Sta. 46+19 is what distance from sta. 86+00? - ANSWER>>3,981'
Is 46+19 up-station or back station from 86+00? - ANSWER>>Back station Sta. 3+15.50 is what distance from sta. 3+12.75? - ANSWER>>2.75' Is 3+15.50 up-station or back station from 3+12.75? - ANSWER>>Up-station Even though slope and gradient are calculated the same, they have different meanings when speaking in - ANSWER>>Construction terms Gradient is used when discussing - ANSWER>>Longitudinal roadway vertical elevation changes Slope is mainly used when talking about vertical changes in elevation left and right, specifically for - ANSWER>>ADA ramps, pipe and shoulder ditches (It's a more professional terminology) Grade or gradient is the - ANSWER>>Longitudinal vertical profile (rise/fall/ or flatness) of the roadway. Grade or gradient is calculated in - ANSWER>>Percent (%) The grade can either be - ANSWER>>Rising (+%), falling (-%) or flat (0.00%) % grade is calculated as: - ANSWER>>Vertical distance/horizontal distance x 100= Y% Slope is defined as the measure of the - ANSWER>>Steepness of a line
1 - ANSWER>>The pH number that indicates the greatest acidity is 5KG - ANSWER>>Approximate mass of 49N weight is Atomic nucleus - ANSWER>>The atomic number is the number of protons in an atom
