On a highway survey, what distance does one full station represent?
Surveying Streets Highways
Question · Easy
Divide by twenty-seven
Short
A concrete paving run begins at Station 12+50 and ends at Station 18+25. What is the length of the run?
Question · Medium
A two-lane concrete street is 24 feet wide with a 2 percent crown falling both ways from centerline. How much lower is each gutter grade than the centerline grade?
Question · Hard
Trades Exam Prep Podcast
Listen on Spotify
Podcast
Highway slope stakes are set so a 3:1 foreslope can be built from the hinge point. For a 6-foot cut measured vertically from the hinge, how far horizontally from the hinge should the catch point fall?
When laying out a rectangular building pad, what is the most reliable field check that the corners are square?
Surveying Buildings
What is the primary purpose of batter boards on a building site?
A crew uses a 3-4-5 triangle to square a building corner. If the short legs are 30 feet and 40 feet, what must the diagonal measure if the corner is square?
A level has a height of instrument (HI) of 214.65 feet. A grade-stake rod reading of 6.40 feet is taken on a hub. If finish floor is 207.00 feet, what cut or fill is required at the hub?
Under the APWA uniform color code used for South Carolina 811 marks, what does yellow indicate?
Measurements Markings
What color must an excavator use to pre-mark a proposed paving excavation when the work area cannot be clearly described by address alone?
On a fine-graded subgrade, what do blue tops typically mark?
A string line for a slipform paver is set 2.00 feet above the finished concrete surface. If a spot check shows the string is only 1.85 feet above the fresh concrete, what does that indicate?
Plan station 45+80 plus a 275-foot offset along the centerline is what station?
Under S.C. Code § 58-36-20, if a marked facility's diameter is not shown, how wide is the tolerance zone on each side of the mark?
Before excavating for a concrete street reconstruction in South Carolina, whom must the excavator notify so member operators can mark underground facilities?
Excavating Grading
What is the purpose of proof-rolling a prepared subgrade before placing base or concrete pavement?
A plan calls for a 2:1 cut slope. If the vertical cut at a station is 8.0 feet, what is the horizontal distance from the top of cut to the hinge at subgrade?
Why is unsuitable material such as muck or highly organic soil removed from a pavement subgrade rather than simply covered with aggregate?
In earthwork estimating, what does a positive swell factor describe?
A cut yields 800 bank cubic yards (BCY). The soil swells 25 percent when loaded. How many loose cubic yards (LCY) must the trucks haul?
An embankment requires 1,000 compacted cubic yards (CCY). The borrow shrinks 15 percent from bank to compacted condition. How many bank cubic yards must be excavated?
When finishing a roadway subgrade for concrete pavement, what is the correct relationship between the finished subgrade surface and the planned pavement?
In SCDOT 2007 Standard Specifications, graded aggregate base (GAB) for roadway work is specified in which section?
Subbases
What is the principal function of a granular subbase under concrete pavement?
SCDOT 2007 Section 305 graded aggregate base commonly includes which two material types?
Why is a geotextile sometimes placed between a fine-grained subgrade and an open-graded aggregate subbase?
What happens if a graded aggregate base is placed much thicker in one wheel path than the other before concrete paving?
Just before placing concrete pavement, the prepared base or subgrade should typically be in which moisture condition?
What is the main reason an open-graded drainage layer under concrete pavement must daylight to a drain or ditch?
A concrete pavement is 10 inches thick on a 6-inch GAB. Finished pavement elevation is 102.50 feet. What should the top-of-base elevation be?
Why should segregated, pocketed coarse aggregate in a GAB surface be remixed or removed before paving?
Compared with a dense-graded aggregate base, a cement-stabilized base under concrete pavement is used primarily to:
What does a standard Proctor test (ASTM D698) establish for a soil or base material?
Compaction Stabilization
Why is soil compacted near its optimum moisture content rather than very dry or very wet?
Why is embankment fill placed in relatively thin, horizontal lifts rather than in one deep dump?
A laboratory standard Proctor maximum dry density is 120 pcf. A field test shows 114 pcf dry density. What relative compaction was achieved?
A nuclear gauge reports a wet density of 132.0 pcf and a moisture content of 10 percent. What is the dry density?
Which compaction equipment is generally most effective on cohesive clay fills?
A specification requires at least 95 percent of a 118 pcf Proctor maximum dry density. Which field dry density meets the specification?
Lime is added to a fat clay subgrade under a future concrete pavement primarily to:
A field density test is 96 percent of maximum dry density, but the moisture is 5 percentage points dry of optimum and the proof roll pumps. What is the most appropriate contractor action?
Which statement best describes the difference between standard Proctor (ASTM D698) and modified Proctor (ASTM D1557)?
In concrete mixture design, which single ratio has the strongest effect on strength and permeability?
Concrete
What does a slump test (ASTM C143) measure?
Why is air-entrained concrete specified for exterior concrete pavement in climates with freezing and deicing salts?
According to common ready-mixed concrete practice (ASTM C94), what is the usual time limit from the start of mixing to complete discharge unless the specifier allows otherwise?
Loading more…