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CR-21 Landscaping and Irrigation Systems (Residential/Commercial) (2016-03-04)

C-21 Scope
Preparation and alteration of land for horticulture and arboriculture. Installation of irrigation systems and controls. Carpentry is limited to decorative fences and screens, planter boxes, and plant tubs common to the industry. Excluded are retaining walls over 3 feet, decorative walls or fences over 6 feet, perimeter walls, fences, and load bearing slabs and walkways. If necessary, a new circuit may be added to the existing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel. This scope includes all C-21R subclassifications.

A21 Scope
Treat, condition, prepare, and install topsoil. Plant all decorative vegetation. Excavate, trench, bore, backfill and grade as necessary for installation of landscaping and irrigation systems. Landscaping includes installation of non-loadbearing slabs, walkways and areas using concrete, brick, stone, or gravel; wooden decks; decorative garden walls, fences and screens up to 6 feet in height; retaining walls up to 3 feet in height; and all other materials and equipment common to the industry. Excluded are cast-in-place or tilt concrete; load bearing walls for structures; and perimeter fencing along property lines or boundaries. Install, repair, and maintain irrigation systems to distribute water for the purpose of irrigation, dust and soil erosion control using equipment, materials, and fittings common to the industry. This includes electrical control panels and apparatus which are an integral part of the irrigation system. Connections to potable water lines, installation of backflow prevention devices, installation of hose bibs and installation of service lines from source of supply are permitted only when they are an integral part of the irrigation system. Installation of electric wiring and related fixtures of 110 volts or less for landscaping projects is included. All electrical work is limited to exterior use and only that work necessary to complete a landscaping project. If necessary, a new circuit may be added to the existing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

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70% Minimum Passing Score
180 Minutes Time Allowed
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Open Book These books are allowed while taking your test.
Closed Book These books are for pre-test study only and are not available for use during the test.

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    Publication Year: 2012

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    Simplified Irrigation Design

    Publication Year: 1995
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    The Second Edition of this best-selling academic guide to irrigation design has been completely rewritten so you can understand it easily. Created for the irrigation designer and installer, as well as students, Simplified Irrigation Design clearly explains irrigation design and related hydraulics, without the need for interpretation by teachers. Each chapter builds on the other, presenting all the fundamentals of irrigation design before getting into the more complicated aspects of irrigation, such as: * basic hydraulics * pipe sizing * friction loss calculations * determining water pressure. Photos and illustrations show exactly how every concept and piece of equipment works. In addition, you'll learn how to estimate costs and write specifications. Pipe sizes are described according to ASTM to help you fully understand the limits of irrigation pipe use. The expanded Second Edition of this popular guide to landscape irrigation includes all the latest equipment and techniques. Just a few of the new features include: * Methods of conserving water to help you anticipate your clients' environmental concerns * Computerized methods for managing labor and irrigation systems that will help you save money on labor and water costs * Metric values for every Imperial (U.S.) measurement, enabling you to meet federal metric guidelines and better communicate with an international audience. Another bonus: the author has combed the minds of irrigation designers, contractors, and equipment manufacturers to help you avoid costly mistakes that even veterans make. Whether you're just learning or brushing up on the latest technology, you'll want to read the Second Edition of Simplified Irrigation Design from cover to cover.
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