F3 - Site Layout

Question 1

What is the difference in elevation between grade stakes if a 2% grade is desired and the stakes are set 23’-4” apart?

Answer 1

5 5/8”

Question 2

What does the abbreviation FG stands for in regards to site plans?

Answer 2

finished grade

Question 3

What does the term “grade” mean?

Answer 3

surface of the ground, or slope of the ground

Question 4

Why are test pits sometimes dug early in the excavation process?

Answer 4

to determine soil type and water table.

Question 5

Which of the following is the strongest naturally occurring material for bearing foundations?

Answer 5

sound rock

Question 6

In the classification of sand for bearing purposes, which is the hardest?

Answer 6

compact

Question 7

How would clay that cannot be indented by thumb pressure be classified?

Answer 7

stiff

Question 8

What is the bearing capacity of dense silt?

Answer 8

100 Kpa

Question 9

Which of the following has the smallest particle size?

Answer 9

clay

Question 10

With regards to back filling, what is a “lift”?

Answer 10

layer of fill

Question 11

What is the term given to placing a deeper concrete foundation at spaced intervals beneath an existing foundation?

Answer 11

leg and leg

Question 12

What is the term for putting a new foundation under an existing foundation?

Answer 12

underpinning

Question 13

How or where is a needle beam placed?

Answer 13

through a hole in a wall

Question 14

Below what depth must excavations be shored?

Answer 14

1.2 m

Question 15

What is the ratio H: V when trench walls are sloped?

Answer 15

3:4

Question 16

How far above the grade must shoring uprights (soldiers) extend?

Answer 16

300 mm

Question 17

Uprights in a shore can be how high from the bottom of the trench?

Answer 17

600 mm

Question 18

Over what depth of excavation is the supervision of a professional engineer required?

Answer 18

20 ft.

Question 19

What is Type B soil?

Answer 19

likely to crack or crumble

Question 20

What is the maximum trench depth in which 3/4” thick plywood can be used to replace uprights?

Answer 20

9

Question 21

If a 2 M wide trench, 3.6 M deep, is to be sloped to the WCB minimum angle, what would be the distance across the top of the excavation?

Answer 21

7.4 M

Question 22

Trenches need not be shored if their sides are sloped. What is the minimum horizontal distance of the sloped area for an 8 foot (2400 mm) deep trench?

Answer 22

6 feet (1800 mm)

Question 23

How far out of plumb can trench shoring may be installed?

Answer 23

15°

Question 24

How many cross braces are required for trenches 12’ to 15’ deep?

Answer 24

3

Question 25

What is the term used to describe soil or rock anchors beyond the excavation to support sheet piling around an excavation?

Answer 25

the tie-back system

Question 26

When a wall of a building is supported by a sloping shore, what is placed above the shore?

Answer 26

a waler

Question 27

What is the term used for a boxlike form, which is made by driving sheet piling close together?

Answer 27

cofferdam

Question 28

What is the term used for the wall made when a tremie pipe delivers concrete to displace a mixture of water and bentonite?

Answer 28

concrete slurry wall

Question 29

What is the name of the steel H beams used in a concrete slurry wall?

Answer 29

soldiers

Question 30

How or where are heavy wood planks placed when steel soldier piles are installed in a retaining wall?

Answer 30

horizontally between the flanges

Question 31

When should shores on excavations be checked?

Answer 31

all of the above

Question 32

How deep must an excavation be before a ladder is required for workers who enter it?

Answer 32

1.2 m

Question 33

What is the maximum slope of planks used for a walkway?

Answer 33

600 mm in 3 m

Question 34

In what part of the Occupational Health and Safety Regulations are regulations regarding blasting found?

Answer 34

21

Question 35

What is the required minimum inside height of a covered walkway?

Answer 35

2.5 m

Question 36

A covered walkway is required if the construction project is closer than to a public right of way.

Answer 36

2 m

Question 37

How deep must polyethylene gas lines be buried?

Answer 37

460 mm

Question 38

Why does the gas line surface before entering the building?

Answer 38

So that leaks in trench will vent outside.

Question 39

How deep are steel pipe gas lines usually buried?

Answer 39

305 mm