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Test 14

I. Identify the one underlined word or phrase that must be changed in order for the sentence to be correct:

1. When an arched dam becomes so slender that it can no longer act as a

A B C

gravity dam it must be regard as an arch dam.

D

2. A number of buttress dams was built in the USA in the 1960’s when

A B

the ratio of labour cost to materials cost was comparatively low.

C D

3. The most important types of buttress dams is considered to be the flat

A B C D

slab and the multiple arch dams.

4. These dams differ in that the water-supporting member in one case is

A B

a series of flat reinforcing concrete decks, while in the other it is a wider

C D

spacing of buttresses.

5. The civil engineers must to adapt the form of their dams to the

A B C

topography of the sites.

D

6. It should be noted that the arch-gravity dam resists the water pressure

A B C

from its weight.

D

II. Choose the one word or phrase that best completes the sentences:

1. Sloping membrane of the buttress dam … used to transmit the water load to series of buttresses.

a) being; b) is;

c) were; d) be.

2. The experts came to the conclusion that few arch dams …, in comparison with the more numerous failures of other types of dams.

a) have failed; b) are failed;

c) are failing; d) had failed.

3. Buttress dams … less concrete than gravity dams.

a) are required; b) requires;

c) were required; d) require.

4. A research work … in Ukraine and abroad for improving designs of existing dams.

a) conducted; b) are conducted;

c) is conducting; d) is being conducted.

5. No structure … endure without an adequate foundation.

a) couldn’t; b) can;

c) can’t; d) could be.

6. The supporting soil, the foundation, and the body of dam form one single unit and … as a whole.

a) are considering; b) has been considered;

c) should be considered; d) have been considering.

III. Complete the sentences matching the words from the column to the sentence gaps:

1. Arch dams are built in … … .

1. buttresses

2. The sidewalls of the canion are capable of … the arch forces.

2. increased formwork

3. The water load is transmitted to series of … at right angles to the axis of the dam.

3. gravity dams

4. In principle, … … aren’t used at sites which are narrow and deep.

4. resisting

5. The arch and … … resist jointly the horizontal component of the water load.

5. narrow emplacement

6. Buttress dams require … … and reinforcement steel.

6. cantilever action

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