C27 License - C-27 Landscaping Contractor License Site Preparation and Grading Questions and Answers

Question 1

A C-27 contractor is preparing a residential site for a new lawn and patio.
Before starting any excavation or grading, what is the first and most critical step to ensure safety and compliance with California law?

Accepted Answer

Call 811 (Underground Service Alert) to have all underground utilities located and marked.

Answer

Order the landscape materials and have them delivered to the site.

Answer

Begin rough grading to establish the general contours of the design.

Answer

Set up irrigation system markers based on the landscape plan.

Question 2

When grading a landscape to ensure proper surface drainage away from a building's foundation, what is the generally accepted minimum slope?

Accepted Answer

2% (1/4 inch per foot)

Answer

1% (1/8 inch per foot)

Answer

5% (5/8 inch per foot)

Answer

0.5% (1/16 inch per foot)

Question 3

A client's project involves creating a level pad for a shed on a sloped backyard. This requires cutting into the hillside and using the excavated soil to build up the lower side. What is the most important consideration for the fill portion of the graded area?

Accepted Answer

The fill soil must be compacted in lifts (layers).

Answer

The fill soil should be mixed with organic compost.

Answer

The fill soil should be left loose to settle naturally.

Answer

The topsoil should be placed first, followed by the fill.

Question 4

Which of the following is a primary purpose of a 'rough grade' during site preparation?

Accepted Answer

To establish the basic contours and drainage patterns of the site.

Answer

To install plant material and mulch.

Answer

To perfectly level the soil for hardscape installation.

Answer

To test the soil's pH and nutrient levels.

Question 5

During a grading operation on a windy day, what is the contractor's primary responsibility regarding airborne particles?

Accepted Answer

Post signs warning of the dusty conditions.

Answer

Increase the speed of work to finish the job faster.

Answer

Ensure all workers are wearing sunglasses.

Answer

Implement dust control measures, such as periodic watering of the site.

Question 6

According to the CSLB's C-27 examination content outline, 'Construction Preparation' includes which of the following activities?

Accepted Answer

Site planning, erosion control, and grading.

Answer

Project estimating and hardscape design.

Answer

Drainage systems and plant installation.

Answer

Maintenance, repair, and lighting.

A C-27 contractor is preparing a residential site for a new lawn and patio.Before starting any excavation or grading, what is the first and most critical step to ensure safety and compliance with California law?

A C-27 contractor is preparing a residential site for a new lawn and patio.
Before starting any excavation or grading, what is the first and most critical step to ensure safety and compliance with California law?