Test II

Match words in columns A and B (synonym match):

A B

1. evaporation a). foundation b). vaporization

c). differentiation d). supportiveness

2. surrounding a). twisting b). covering

c). burning d). neighboring

3. property a). feature b). masonry

c). space d). readiness

4. harmful a). prevalent b). transparent

c). optional d). destructive

5. to retain a). to paint b). to preserve

c). to match d). to contain

6. delay a). assembly b). purpose

c). retention d). choice

7. available a). disposable b). institutional

c). adhesive d). primitive

8. satisfactorily a). practically b). impressively

c). entirely d). adequately

9. to expose a). to compose b). to exhibit

c). to crack d). to strengthen

10. application a). resolution b). improvement

c). accumulation d). use

Test III

Select the best possible answer out of the choices from the list to the statements (multiple choice):

1. The strength and durability of concrete will be fully developed only … .

a. if loss of water by evaporation is prevented.

b. if the amount of mixing water in the concrete at the time of placement is more than required for hydration.

c. if it is properly cured.

d. if curing begins as soon as possible after the casting of concrete.

2. Excessive loss of water by evaporation may … .

a. lead to possible adverse effects on concrete.

b. preclude from obtaining the necessary properties of the concrete.

c. depend on the temperature and humidity of the surrounding air.

d. reduce the amount of retained water below what necessary for development of desired properties.

3. Curing compound should not be used on surfaces … .

a. that are to receive additional concrete, paint, or tile which require a positive bond.

b. covered with such materials as burlap, cotton mats, rugs, etc.

c. which are laid open to strong winds and bright sun's rays.

d. where wet curing is not possible.

4. Curing compound is very suitable for large areas of concrete … .

a. in case of continuous or frequent application of water.

b. when regular supply of potable water for curing is available.

c. if the membrane can be satisfactorily removed before the subsequent application.

d. which are exposed to sunlight, heavy winds and other environmental influences.

5. The potentially harmful effects of evaporation … .

a. will hinder the development of the desired properties of concrete.

b. depend on the temperature, humidity of the surrounding air and on the velocity of wind.

c. must be prevented either by applying water or preventing excessive evaporation.

d.. will lead to the reduction of the strength and durability of concrete.

Test IV

Complete the sentences by filling in the correct word that fits a statement (gap fill). Choose the appropriate words from the word bank given below.

A. durability B. harmful C. possible D. curing

E. delay F. efficient G. incorporated H. surrounding

I. prevented J. consists K. moisture retentive L. excessive

1. The necessity for …… arises from the fact that hydration of cement can take place only in water-filled capillaries.

2. A loss of water by evaporation from the capillaries must be …… .

3. The strength and …… of concrete will be fully developed only if it is properly cured.

4. …… loss of water by evaporation may reduce the amount of retained water below what necessary for development of desired properties.

5. The potentially …… effects of evaporation must be prevented either by applying water or preventing excessive evaporation.

6. Curing by water is one of the most …… ways for curing concrete.

7. Any …… in curing will lead to evaporation of mixing water.

8. Concrete curing compound …… essentially of waxes, natural and synthetic resins and solvents.

9. The compound forms a …… film shortly after being applied on fresh concrete surface.

10. Curing compound ca n be used with advantage where wet curing is not …… .

UNIT 21