Diagnostic Exam for Highway Street and Bridge Construction

1. A chip seal (bituminous surface treatment) will be applied to an existing asphalt pavement in two applications.  The size of the aggregate for the first application will be 3/4”.

The size of the aggregate for the second application should be no larger than:

2.

Far too much prime coat has been used on a base course for a hot mix asphalt pavement.  A couple of days later, the contractor inspects the base course and finds that much of the prime coat has not been absorbed by the base course.
The contractor should:

3. Which type of equipment below can be used to drive a batter pile without using a pile cap?

4. Epoxy coated reinforcing bars are hoisted and set into place in a pavement:

5.

Which of the soils below would be the best for pavement subgrades?

6. A subgrade soil will be hauled in by dump trucks. The most important time for the soil to be near optimum moisture content is when the soil is:

7. The soils report shown below for a highway subgrade for a concrete pavement would indicate that the soil:

8. All of a composite sample for an air content test for a concrete pavement has been collected. The test(s) should be started within:

9. A bridge contractor has a scaffold for employees to work on in a very narrow area.  The OSHA Safety and Health Regulations for Construction  (29 CFR 1926) require that guardrails and/or personal fall arrest systems must be used if the scaffold walkway is less than:

10. When consolidating concrete for a pavement, the vibrator should normally be inserted each time for about:

A concrete pavement section will be 24 feet wide, 100 feet long, and 14 inches thick.  The cost of the concrete is $88 per cubic yard, and the cost of additives is $8.27 per cubic yard.  If there is a waste factor of 8% added in for the concrete, how much would the concrete and additives cost?

11. Do not include other costs not stated, such as for labor, overhead, etc.

12. Of the angles listed below, the two legged steel chain sling shown would be able to hold the most weight if the angle at A would be:

13. Flowable fills (soil-cement slurries) are most commonly used as an alternative to:

14. According to the Louisiana Standard Specifications for Roads and Bridges, 2016 Edition, when using a stone backfill for a concrete pipe, a geotextile fabric should be used, the backfill should be placed over the geotextile fabric, and the geotextile fabric should next be:

15. The back of the fill stake as shown indicates that the distance from the centerline of the road to the surveyor’s hub is:

A borrow pit which will supply the fill to be used for a work site is located 1 mile from the work site.  One front-end loader and one dump truck will be used.  The following information is known:
     

Amount of fill needed at the work site:  1,148 cubic yards
Front-end loader:  2.25 cubic yard capacity
Dump truck capacity: 12 cubic yards
The front-end loader can load 28 bank cubic yards per hour in this setup.
The dump truck can make 2 ½ hauls per hour in this setup. 

Cost of equipment = $47 per hour.
Cost of labor = $21.25 per hour.
16. NOTE: For this question, assume that the soil does not swell or shrink.

Using only the costs and amounts above, the total cost of hauling the fill needed will be:

17.

The illustration shows the slow side of each of four slow/stop paddles used by flaggers for traffic control.
Which of the four meets the requirements of the Manual on Uniform Traffic Control Devices for this paddle?

18.

The width of a normal longitudinal line used in roadways is:

19. In the illustration shown, the elevation of the fill at the centerline is about:

20. A base course for a state highway pavement will use recycled Portland cement concrete.  According to the 2016 Louisiana Standard Specifications for Roads and Bridges, the finish rolling for the compaction of this base course may be done using a: