Download NICET LEVEL 1 IN HIGHWAY CONSTRUCTION and more Quizzes Nursing in PDF only on Docsity!
NICET LEVEL 1 IN HIGHWAY
CONSTRUCTION
The weight of a 2 cubic foot block is 300 lbs. How much does this block weigh when submerged into water? - ANSWER-Weight= original weight - weight of water displaced. =300 lbs. - (2 x 62.4) = 175 lbs. The pH value of a liquid will indicate? - ANSWER-Whether the liquid is acid or base. What is the chemical symbol for silver? - ANSWER-Ag A car starting from rest accelerates at a rate of 8 ft/sec^2. At the end of 6 seconds how fast has the car traveled? - ANSWER-S=vo t + 1/2 a t^ S=0 x 6+ 1/2(8) 6^ S=144 ft. 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- 6 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 Guardrail is 25' long. What is the center spacing of the posts if mounted on 8 spots? - ANSWER- 8 posts means 7 spaces, therefore 25'/7=3.57' How is the paint thickness measured? - ANSWER-Mils
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' What happens when the soil moisture content is greater than the optimum moisture content by more than the specification tolerance? - ANSWER-Erosion Where is the thickness of aggregate surface specified? - ANSWER-Cross section sheets What is water moisture content? - ANSWER-In given soil mass the ratio expressed as a percentage of the weight of dry soil particles.
Define optimum moisture content? - ANSWER-The degree or percentage of moisture in soil at which the soil can be compacted to its greatest density.
- Sum and total signifies...
- Difference signifies...
- Product,times, and multiples of signify...
- Quotient, divided by, per, and ratio signify...
- Same as and equal to signify... - ANSWER-1. Addition
- Subtraction
- Multiplication
- Division
- Equality There are 3 types of views - ANSWER-Plan view, elevation or profile view, and cross section view A view from above - ANSWER-Plan view A view from the front or side - ANSWER-Elevation view A view as if the object has been cut open - ANSWER-Cross-section view 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-
Distances shown on the plans are always - ANSWER-Measured either horizontally or vertically, never along the slope of the ground. Scale Map distance
- 1"=100' 1/2"
- 1"=100' 2"
- 1"=100' 3 3/4"
- 1"=10' 1/4"
- 1"=1 mile 1 1/4" - ANSWER-Ground distance (ft)
- 50'
- 200'
- 375'
- 2.5'
- 6,600' The term stationing (sta.) is used to - ANSWER-denote project longitudinal length along a surveyed line. A station is equal to 100 feet of distance. - ANSWER- 1 foot=12 inches 1 station=100 feet 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- 35 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 Slope is calculated as - ANSWER-Vertical length over horizontal length - AKA "rise over run" When slope ratios are given it is 99% of the time the? of the rise over run answer (see example picture under cross-slope) - ANSWER-Inverse ratio Slope formula - ANSWER-Vertical distance/horizontal distance % slope formula - ANSWER-Vertical distance/horizontal distance x 100 Cross-slope is defined as the - ANSWER-Transverse slope with respect to the horizon
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 A number 6 reinforcing bar has what size diameter? - ANSWER-Multiply the size by 1/8" 6 x 1/8 = 0.75" Answer is 0.75" What does critical path method mean? - ANSWER-It is the speed a project can be completed. It does not include any float days. A map has a scale of 1" = 2.5 miles. The distance between two points is on the map is 3". What is the actual distance on the ground between these two points? - ANSWER- 3 x 2.5 x 5.280' = 39,600 ft.
Define a contour line - ANSWER-A line drawn on a plan, which connects all points of equal elevation, above or below a known or assumed reference point or plane. Drainage always occurs? - ANSWER-Perpendicular (at right angle) to the contour lines What instrument is commonly used to check the area on a map? - ANSWER- Planimeter In topographical maps, the lines drawn to show relief by means of hill shading are called? - ANSWER-Hachures A freeway rises 25 feet in 2 miles. What is the % grade? - ANSWER-Slope = rise/run =25/(2 x 5280) =0. =0.00236 x 100 = 0.24% 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 = 4 πr^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
("Y")=vertical distance/horizontal distance
