1. Choose the correct variant

1. Concrete is considered to be

a) a universally used material

b) a frequently used material

2. Various kinds of concrete are used

a) for a limitless number of building purposes

b) only for some building purposes

3. The main property of concrete is

a) its relatively low cost

b) that it can be formed into monolithic slabs

4. Concrete is known to be

a) fire-resistant

b) fire- and decay-resistant

5. Concrete is produced

a) by combining coarse and fine aggregates

b) by combining coarse and fine aggregates, Portland cement, and water

6. There exist(s)

a) only one way of producing concrete

b) many different ways of producing concrete

7. The only disadvantage of concrete is

a) that it has no form of its own

b) that it does not possess tensile strength

8. Concrete is frequently combined

a) with steel and iron

b) with copper

9. The main good qualities of prestressed concrete are

a) its high strength and durability

b) its buildability and low cost

10. a) High-grade concrete

b) Nailable concrete

11. Ferro-concrete is widely used

a) for construction of girders and beams

b) for construction of foundations, girders, beams, and dock walls

12. Silica concrete belongs to

a) comparatively old types of concrete

b) comparatively new types of concrete

13. Decrease in weight leads to

a) a considerable increase in

b) considerable decrease

14. Foamy and cellular types of concrete

a) possess heavy weight

b) possess light weight

15. The quality of the cover zone is important for

a) providing concrete durability

b) providing concrete fire-resistance

16. Increasing workability of the mix is achieved

a) by pouring additional water into the mix

b) by evaporating water from the mix

17. Additional water produces

a) concrete’s reinforcement corrosion and cracking

b) concrete’s reinforcement corrosion-resistance

18. a) The use of CFRP plate bonding was considered to be useful

b) The use of steel plate bonding for strengthening the tower

19. Mixing wires with enlarged ends into concrete

a) decreases the concrete’s strength and hardness

b) increases its strength and hardness

20. For repairs of the pipe storage

a) polypropylene fibres are mixed with soil

b) polypropylene fibres are mixed with gravel

21. The urban storm-water pollution filter cleans the stormy water

a) before it enters the drain system

b) after it enters the drain system

22. Solid pollutants are collected

a) in an internal basket of the filter

b) in an external basket of the filter

23. Composite materials

a) are rarely used

b) have a wide range of application

24. The fibre reinforced polymer bridge deck

a) is highly resistant to corrosion

b) is highly resistant to corrosion and fatigue

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