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Question 1 of 15
1. Question
Permanent load restrictions can be used to protect roads with weak bridges.Correct
Incorrect
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Question 2 of 15
2. Question
Temporary load restrictions have to be imposed every year at the same place.Correct
Some of the weakest roads will need load restrictions every year but most roads will only have problems during the most severe winter freeze-thaw cycle periods, or during spring thaw weakening periods.
Incorrect
Some of the weakest roads will need load restrictions every year but most roads will only have problems during the most severe winter freeze-thaw cycle periods, or during spring thaw weakening periods.
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Question 3 of 15
3. Question
CTI s a system that controls the tyre pressures of a truck.Correct
Incorrect
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Question 4 of 15
4. Question
The standard tyre pressure of a truck is 600 KPa and it is designed for trucks traveling fully loaded at 80 km/h.Correct
The standard tyre pressure of a truck is 800 KPa and is designed for trucks traveling fully loaded at 100 km/h.
Incorrect
The standard tyre pressure of a truck is 800 KPa and is designed for trucks traveling fully loaded at 100 km/h.
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Question 5 of 15
5. Question
Different axle configurations are mainly used to prevent Mode 2 rutting.Correct
Mode 1 rutting.
Incorrect
Mode 1 rutting.
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Question 6 of 15
6. Question
Adding new layers on the top of a road is usually suitable for most road structural problems.Correct
This structure can be expensive and inefficient and can cause settlements. The reason of the underlying problems should always be investigated first and, based on the findings, the best solution selected.
Incorrect
This structure can be expensive and inefficient and can cause settlements. The reason of the underlying problems should always be investigated first and, based on the findings, the best solution selected.
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Question 7 of 15
7. Question
A geotextile should be used to separate road structures from the subgrade soil if the soil is soft and frost susceptible.Correct
Incorrect
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Question 8 of 15
8. Question
Mixmilling is the best solution for roads suffering from differential frost heave problems.Correct
Mixmilling does not help with frost heave problems.
Incorrect
Mixmilling does not help with frost heave problems.
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Question 9 of 15
9. Question
Mixmilling improves the grain size distribution of aggregates and helps roads with Mode 1 rutting problems.Correct
In mixmilling the road structure is homogenized and crossfalls can be improved. The improvement of grain size distribution is normally so low that it does not improve resistance against Mode 1 rutting – especially if the pavement is thin.
Incorrect
In mixmilling the road structure is homogenized and crossfalls can be improved. The improvement of grain size distribution is normally so low that it does not improve resistance against Mode 1 rutting – especially if the pavement is thin.
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Question 10 of 15
10. Question
Stabilization improves the properties of a base course against Mode 1 rutting.Correct
Incorrect
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Question 11 of 15
11. Question
A steel grid is a good solution for the treatment of longitudinal cracking problems.Correct
Incorrect
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Question 12 of 15
12. Question
Foamed glass prevents problems related to road widening.Correct
Foamed glass is usually used as insulation material.
Incorrect
Foamed glass is usually used as insulation material.
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Question 13 of 15
13. Question
A new wearing course and drainage improvement is good for road sections suffering spring thaw weakening problems.Correct
This structure can temporarily fix spring thaw problems, but if the road is already suffering from spring thaw weakening problems, a new wearing course and drainage improvement will not help. A good solution is the removal of the old wearing course, followed by a new base course 20-30cm, a new wearing course and a drainage improvement.
Incorrect
This structure can temporarily fix spring thaw problems, but if the road is already suffering from spring thaw weakening problems, a new wearing course and drainage improvement will not help. A good solution is the removal of the old wearing course, followed by a new base course 20-30cm, a new wearing course and a drainage improvement.
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Question 14 of 15
14. Question
It is easy to add new layers on the top of road in a cutting.Correct
It is difficult to add new layers to a road in a cuttings due to the lack of space beside the road and because vertical geometry of the road will be worse (that is why road cut was originally designed). Soil replacement is a more suitable solution.
Incorrect
It is difficult to add new layers to a road in a cuttings due to the lack of space beside the road and because vertical geometry of the road will be worse (that is why road cut was originally designed). Soil replacement is a more suitable solution.
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Question 15 of 15
15. Question
New aggregates can be added in the mixmilling technique and this can improve the grading of a base course.Correct
Incorrect