CR-21 Landscapes and Irrigation Questions And Answers Rated A+ New Update Assured Satisfaction

What thickness in millimeters of pavers is used for residences? A. .6 B. .5 C. .75 D. 63.5 Brick (paving brick, pavers). Rectangular fired clay brick with typical dimensions of 4 inches x 8 inches x 2.5 inches thick. Available in a range of colors, paving bricks have no mortar holes and an average strength of approximately 5,000 PSI. What is the length of a standard concrete block including the mortar joint? A. 8 inches B. 10 inches C. 12 inches D. 16 inches Sizes are usually given in their nominal dimensions.A unit measuring 7 5/8" wide, 7 5/8" high, and 15 5/8"long is known as an 8" x 8" x 16" unit. The mortar jointis intended to be 3/8" to fit the modular design basedon a 4" module.When should you seal the bottom of a piece of wood fencing? A. If water pools under them B. when within 5 feet of a sprinkler head C. If there is less than 2 inches of clearance from the ground. D. If it touches the earth If the boards have to touch the earth, seal the board ends before you install them. How is transplant shock avoided? A. NEED HELP WITH THIS CHOICE B. Anti transpirants C. increase water D. Fertilize Antitranspirants, also called antidesiccants, are chemicals that reduce the amount of water plants lose through transpiration. Antitranspirants are useful because excessive water loss can result in transplant shock. They normally act either to induce closing of the stomata or to cover the stomata with a water-impermeable coating. A trench has been prepared for a gray water irrigation lines, according to the International Residential Code, what shall be the minimum depth of the filter material beneath the perforated line?A. 12 inches B. 3 inches C. 8 inches D. 6 inches Not less than 6 inches in depth of aggregate, ranging in size from 1/2 to 2-1/2 inches (12.7 mm to 64 mm), shall be laid into the trench below the distribution piping elevation. A CR-21 licensee may install residential misting systems under what PSI? A. 1000 psi B. 120 psi C. 90 psi D. 500 psi HARDSCAPING AND IRRIGATION SYSTEMS This classification allows the licensee to install, alter, and repair: Residential outdoor misting systems. Free standing or attached to existing appurtenance, not more than 1000 PSI. Blue Stake uses orange to mark which of the following? A. GasB. Electric C. Fiber Optics, Cable, Phone D. Sewer Electric Power Distribution - Safety Red Gas, Oil Distribution - High Visibility Safety Yellow Telephone, Cable, Fiber Optics - Safety Alert Orange Water Systems - Safety Precaution Blue Sanitary Sewer Systems - Safety Green Reclaimed Water - Purple What color is used to mark an area for locating utilities prior to excavations? A. Green B. White C. Blue D. Pink All of the following will not decrease the water pressure in a long run of irrigation pipe except? A. A pipe going down hill B. Going from a larger pipe to a smaller pipe C. Less Sprinklers on a run D. Going from a smaller piper to a larger pipeHow is total surge pressure calculate? A. Surge pressure caused by an opening valve plus working pressure in the pipe line B. Water hammer plus static pressure in the pipe line C. Surge pressure caused by a closing valve plus working pressure in the pipeline D. Working water pressure in the pipeline plus static pressure Pressure caused by closing a valve on pressured water When is a good time to transplant? A. Summer B. NEED HELP C. Late Spring D. Early Fall What kind of screw resists rusting? A. Fine thread B. Steel C. PhillipsD. Brass A footing for a fence is 2 Ft deep, 1 Ft wide, and 40 Ft length, how many cubic yards of concrete will we need? A. 2.96 CY B. 80 CY C. 16 CY D. 8.88 CY Reason: Use Formula LxWxD in order to find solution, in this case it is 2x1x40. Then you divide answer by 27 (amount of cubic feet in a yard) to get answer 2.96