Bu basic CH14

Question 1

1. What size is a typical PEB structure? (Page 14-4)

Answer 1

40x100 feet

Question 2

2. How are the component parts of a prefabricated structure shipped? (Page 14-5)

Answer 2

Knocked Down (KD)

Question 3

3. What are one of the first temporary things to be constructed at an advanced base? (Page 14-22)

Answer 3

Human waste disposal facilities

Question 4

4. What is a braced framework of timbers, piles, or steel members? (Page 14-46)

Answer 4

trestle

Question 5

5. What type of bents are used in soft or marshy ground, or where the water is so deep or the current so swift that the use of trestle bents is impossible? (Page 14-46)

Answer 5

pile

Question 6

6. What is the ground support at each of the extreme ends of a trestle superstructure? (Page 14-46)

Answer 6

abutment

Question 7

7. What are the timbers used to brace a trestle bent called? (Page 14-47)

Answer 7

transverse bracing

Question 8

8. What is the uppermost transverse horizontal structural member of a bent? (Page 14-47)

Answer 8

cap

Question 9

9. What is the structure laid on the girders to form the roadway across the trestle? (Page 14-47)

Answer 9

decking

Question 10

10. What is the bottom transverse horizontal structural member of a trestle bent on which the posts are anchored? (Page 14-47)

Answer 10

sill

Question 11

11. What is a single story bent or a multi story bent and the support framework or substructure of a trestle? (Page 14-48)

Answer 11

trestle bent

Question 12

12. Girder stock is usually in how many foot lengths? (Page 14-48)

Answer 12

14

Question 13

13. What is the minimum width for a single lane trestle? (Page 14-49)

Answer 13

14 feet

Question 14

14. Steel is best suited for use as bearing piles where piles must be driven longer than how many feet? (Page 14-53)

Answer 14

80 feet

Question 15

15. Concrete piles more than how many feet long can be cast, but are usually too heavy for handling without special equipment? (Page 14-53)

Answer 15

100

Question 16

16. What is the term to indicate that the pile vibrates too much laterally? (Page 14-58)

Answer 16

springing

Question 17

17. When a pile reaches a level where 6 blows of a drop hammer or how many blows of a steam or air hammer do not drive it more than an average of 1/8 inch per blow the pile has either hit an obstruction or has been driven to refusal? (Page 14-59)

Answer 17

20

Question 18

18. What works to direct and confine a current or tidal flow into a selected channel? (Page 14-62)

Answer 18

jetty

Question 19

19. What is the stone protecting the shoreline against erosion called? (Page 14-64)

Answer 19

riprap

Question 20

20. What are the most typical forms of wharfage structures? (Page 14-68)

Answer 20

moles and jetties

Question 21

21. What are long pipes thrust into the ground down to the level at which the water must be excluded? (Page 14-68)

Answer 21

well points

Question 22

22. What is a temporary structure, usually built in place, and tight enough so that the water can be pumped out of the structure and kept out while construction on the foundations is in progress? (Page 14-68)

Answer 22

cofferdam

Question 23

23. What material is commonly used for cofferdam construction? (Page 14-69)

Answer 23

steel

Question 24

24. What are boxes or chambers used for construction work underwater? (Page 14-70)

Answer 24

caissons