II. Choose the correct word in b and put it into the gap in a.

A	B
1. Survey engineer chooses promising passes in mountain ridges to assess the feasibility of the various possible _____ to be investigated.	a. subgrade
2. Survey in _____ is more stereotyped and depends upon local requirements, towns, villages, buildings, rivers and other country features.	b. routs
3. Having done the preliminary works, the builders are engaged with _____ and culverts construction.	c. gauge
4. _____ involves the entire relaying of rails and ties.	d. easy country
5. A track measuring car examines the width of the _____ .	e. capital repair

III. Choose the only correct answer to the question.

1. What investigation does the surveying involve?

3. geological b) social.

2. What are the rivers behaviour paid much attention to?

3. the problem of high-flood b) the problem of construction.

3. What problems are very important involved in the survey of a new railway line?

3. the problems of straights b) the problems of gradients.

IV. Match these definitions with the words.

1. survey work which is specially important in really difficult country	a. running
2. maps which show planimetry and drainage of the area	b. track measuring
3. a car which is used for providing the safe running of trains	c. topographical
4. repair which involves single replacement of fastenings, local track broaching, doing away with track settlement, single rail relaying, track lining, water discharging, cleaning the track from snow, forcing the choked culverts.	d. preliminary

V. Decide if the sentences are true (t) or false (f).

1. Surveying involves geological investigations.

2. Various operations and activities involved in the survey can be done by an uneducated person.

3. Hydrological investigations are of great importance in the survey.

4. Surveying in the broken country is not difficult.

5. The preliminary work involves cleaning the right-of-way by cutting trees and rooting out stumps.

KEYS to test 1 for self control

I. 1 – j, 2 – d, 3 – g, 4 – e, 5 – b, 6 – c, 7 – h, 8 – f, 9 – a, 10 – i.

II. 1 – c, 2 – a, 3 – b, 4 – e, 5 – d.

III. A – a, B – c, C – b.

IV. 1 – c, 2 – a, 3 – b, 4 – d.

V. 1 – false, 2 – true, 3 – true, 4 – false, 5 – true.

KEYS to test 2 for self control

I. 1–d, 2–k, 3–l, 4–a, 5–j, 6–b, 7–c, 8–m, 9–i, 10–e, 11–f, 12–n, 13–h, 14–g.

II. 1 – b, 2 – a, 3 – c.

III. 1 – d, 2 – c, 3 – e, 4 – a, 5 – b.

IV. a, c, e, g.

V. 1 – d, 2 – a, 3 – e, 4 – c, 5 – b.

VI. 3, 2, 5, 4, 1, 6.

KEYS to test 3 for self control

I. 1 – c, 2 – g, 3 – j, 4 – f, 5 – i, 6 – d, 7 – b, 8 – a, 9 – h, 10 – e.

II. 1 – d, 2 – a, 3 – b, 4 – e, 5 – c.

III. A – a, B – b, C – c.

IV. 1 – c, 2 – b, 3 – a, 4 – e, 5 – d.

V. 1 – false, 2 – true, 3 – false, 4 – true, 5 – true.

KEYS to test 4 for self control

I. 1 – c, 2 – f, 3 – a, 4 – h, 5 – g, 6 – b, 7 – e, 8 – d, 9 – j, 10 – i.

II. 1 – c, 2 – a, 3 – e, 4 – b, 5 – d.

III. a), c), e), f).

IV. 1 – c, 2 – d, 3 – a, 4 – b.

V. 1 – false, 2 – true, 3 – false, 4 – true, 5 – true.

KEYS to test 5 for self control

I. 1 – f, 2 – c, 3 – b, 4 – e, 5 – d, 6 – a, 7 – j, 8 – i, 9 – h, 10 – g.

II. 1 – b, 2 – d, 3 – a, 4 – e, 5 – c.

III. 1 – a, 2 – a, C – b.

IV. 1 – d, 2 – c, 3 – b, 4 – a.

V. 1 – true, 2 – false, 3 – true, 4 – false, 5 – true.

PART II

Tunnels and Bridges