CFI CFI Post Setting & Foundation Work

Question 1

What is the minimum recommended depth for a fence post in most US soil conditions?

Accepted Answer

One-third of the total post length

Answer

One-quarter of the total post length

Answer

One-half of the total post length

Answer

Two feet regardless of post length

Question 2

Which concrete mix ratio is most commonly used when setting fence posts in the US?

Accepted Answer

1 part cement : 2 parts sand : 3 parts gravel

Answer

1 part cement : 3 parts sand : 5 parts gravel

Answer

1 part cement : 4 parts sand : 6 parts gravel

Answer

2 parts cement : 1 part sand : 2 parts gravel

Question 3

What is the primary purpose of flaring the concrete footing at the bottom of a fence post hole?

Accepted Answer

To increase resistance to frost heave and uplift forces

Answer

To reduce the amount of concrete needed

Answer

To allow water to drain away from the post base

Answer

To make removing the post easier in the future

Question 4

In cold climates, fence posts should be set to what depth relative to the frost line?

Accepted Answer

6 to 12 inches below the frost line

Answer

At the frost line

Answer

6 inches above the frost line

Answer

24 inches below the frost line regardless of frost depth

Question 5

Which tool is used to ensure fence posts are set perfectly vertical?

Accepted Answer

Both B and C are acceptable methods

Answer

Torpedo level on one face only

Answer

4-foot level checked on two adjacent faces

Answer

Plumb bob suspended from the post top

Question 6

What is the recommended minimum diameter of a post hole relative to the post itself?

Accepted Answer

Three times the post diameter

Answer

Equal to the post diameter

Answer

Two times the post diameter

Answer

Four times the post diameter