b)combined method – due to technical parameters and characteristics of road performance;

c)consumers’ properties.

5. Additional operation at road reconstruction consists of:

а) removal of soil vegetation layer;

b)right of way clearance;

c)all kinds of communication carrying on and reorganization;

d)traffic management scheme.

6.During road reconstruction road – building organization should supply traffic speed not less than:

а) 20 km/h;

b)30 km/h;

c)40 km/h.

7.At unfavorable soil conditions and increased moisture there are constructed the following:

а) detour parallel to reconstructed road;

b)profiled subgrade along the whole reconstructed road with prefabricated blanket placement;

c)traffic movement along the half of the road.

8.What method of geometrical parameters does not refer to subgrade reconstruction:

а) slop leveling;

b)double sided or one sided widening;

c)change of old subgrade by new one.

9.To provide reliable trimming of added soil with existing subgrade there are cut berms in the following cases:

а) at embankment height up to 2 meters;

b)slop steepness from 1:3 up to 1:5;

c)at embankment more than 2-х meters and slop steepness up to 1:3.

10.In embankment from sandy soil berms slop is:

а) to road axis;

b)from rod axis;

c)perpendicularly to road axis.

11. At subgrade widening it is not allowed to use:

а) loamy soil;

b)sand;

c)silty soil.

12. At embankment height and excavation depth up to 4 meters slop is leveled by:

а) motor grader;

б) excavator – dragline or excavator with telescope jip; в) bulldozer with add on equipment.

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13.Which measures are necessary to be applied to escape frost heaps:

а) road base reinforcement;

b) road base water regime soil properties; c) change of existing road base by new one.

14.Soils according to the grade of heaving are devided into

а) four groups; b) five groups; c) six groups.

15. Into lower part of widening part it is recommended to place sandy soil with rate of filtration:

а) 1 m/day and height of capillary raising up to 35 cm;

b) less than 1 m/ day and height of capillary raising up to 45cm; c) more than 1 m/day and height of capillary raising up to 25 cm;

16. Value of compaction ratio at layerwise embankment widening should be:

а) 0,95; b) 1,0; c) 0,98.

17. Which component does not suitable for working mixture content for slop soling by the method of hydro sowing

а) perennial grass seed mixture;

b)fertilizer;

c)mulch material;

d)Portland cement;

e)film-forming material;

f)water.

18.Which factors influence on frost heaves?

а) presence of heaving soils;

b)intensive frost accumulation;

c)slow and deep frost penetration under road base more than 0,5 m;

d)simultaneous combination of factors a),b) and c).

19.For regulation of warm regime of subgrade:

а) increase embankment height;

b)arrange heat insulating interlayer or upper part of embankment;

c)arrange drainages;

d)arrange frost protection layers.

20. Trench drainage structure:

а) crushed stone - pipe;

b)without pipes;

c)without joints.

21. Cross drainages of shallow foundation on the sections with longitudinal

slops:

а) 20 - 40‰; b) 40 - 80‰;

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c) more than 80‰.

22. At widening of road base on 2,0m and more to the direction of road

side:

а) cut off the subgrade from widen side up to the bottom of existing road base;

b)make trench dig along the existing road base;

c)arrange dike dig along the existing road base.

23.What for leveling layer is constructed at one side widening of road

base?

а) for leveling of road surface; б) for road axis replacement;

в) for the same cross slops conservation.

24. Margin course can be:

а) from prefabricated slabs;

б) as the type of main road base; в) from monolithic concrete.

25. At the partial dismounting of road base, for removal of asphalt concrete blanket there is applied:

а) rippers;

б) excavators; в) cutters;

г) motor concrete crows.

26. Materials after removal of asphalt concrete blanket is called:

а) “phresan”;

б) asphatogranulyant (asphalt concrete chip); в) granulyat (chip);

г) kroshka (granulated material).

27. For hot regeneration there is used:

а) Remixer; б) cutter;

в) heater of ДЭ-234 type and , and heat mixer of ДЭ-232 type.

28. For cold regeneration there is used:

а) remixer; б) cutter;

в) heater of ДЭ-234 type and heat mixer of ДЭ-232 type.

29. Rehabilitation of road base with cement concrete blanket can be fulfilled by the following methods:

а) arrangement of reinforced layers from asphalt concrete mixtures over old cement concrete blanket without destruction of its integrity;

б) the same with preliminary crushing of old cement concrete blanket ad carefully compaction of received by the same way foundation material;

в) arrangement of reinforced layer from continuous reinforced concrete over cement concrete blanket.

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