Download CR – 21 LANDSCAPES AND IRRIGATION AZROC and more Exams Land Development in PDF only on Docsity!
What is the minimum thickness of brick for the exterior wall of a fireplace? a) 6 inches b) 8 inchesc) 10 inches d) 9 inches - Correct answer -8 Inches What is 1/2 inch of accumulated organic material in a grassy area called? a) mulchb) ground cover c) stolonsd) thatch layer - Correct answer -Thatch Layer
What should be provided as a cover for the drain tile before installing the pond liner where subdrain isused?
a) 4 inches of pea gravelb) screen with 1/4 inch mesh c) a pool grated) 8 inches of medium sized rock - Correct answer -4 inches of pea gravel
How do you properly plant ground cover? a) in a circular pattern b) in rows, each row staggeredc) in groups of 2
d) 18 inches apart in rows - Correct answer -In rows, each row staggered You are going to pour a concrete pad that is 16 feet by 22 feet and 4 inches thick, how many cubic yardsof concrete are needed?
a) 7.3b) 6. c) 3.3d) 4.3 - Correct answer -4.3 cubic yards 4.3 cubic yards4inches ---> 0.333ft Cubic feet to cubic yards /2716220.333=117. 117.3333/27 = 4.3 cubic yards How wide should the footer be for a CMU wall? a) equal to the width of the blockb) equal to the depth of the frostline c) three times the width of the blockd) twice the width of the block - Correct answer -Twice the width of the block
How does a contractor know how to fill a trench to a certain grade? a) by guessing b) the type of soilc) by available backfill d) the specifications - Correct answer -The specifications
a) 3 feetb) 6 feet c) 9 feetd) 4 feet - Correct answer -4 feet
Which is the most common voltage requirement for the operation of a typical irrigation system remotecontrol valve?
a) 24 volt DCb) 12 volt DC c) 12 volt ACd) 24 volt AC - Correct answer -24 volt AC
All of the following are reasons for pruning plants except to: a) restricted size b) rejuvenate growthc) decrease fruit bearing capacity d) improve flowering - Correct answer -Decrease fruit bearing capacity What type of tree would make a good focal point and screen? a) wide oval shapedb) pyramidal c) spreadingd) vase shaped - Correct answer -Wide oval Shaped
What is necessary to supply power to the electrical source on a water fixture?
a) 12-3 wireb) flexible conduit c) 3 phase motord) schedule 40 conduit - Correct answer -Schedule 40 conduit
What fitting is used for changing directions with a pipe vertically or horizontally? a) reducing 90 degree threaded elbow b) 90 degree slip elbowc) 90 degree threaded elbow d) reducing 90 degree slip elbow - Correct answer -90 degree slip elbow Which of the following should NEVER be done when transplanting a Balled and Burlapped (B&B)evergreen?
a) loosen the burlap around the soil ball b) water deeply when the hole is half fullc) dig the hole 100 percent larger than the soil ball d) apply fertilizer to the soil during conditioning - Correct answer -Apply fertilizer to the soil duringconditioning
What is the minimum distance that a portable heater should be placed away from a wall? a) 24 inches b) 12 inchesc) 18 inches d) 36 inches - Correct answer -12 inches
What is the required slope of the ground immediately adjacent to a residential structure? a) 1 in 12 for min of 12 feet b) 6 inches for a min of 10 feetc) 1 in 12 for a min of 6 feet d) 2 in 12 for a min of 12 feet - Correct answer -6 inches for a minimum of 10 feet What is the benefit of an as-built plan? a) purchase leverageb) shows where the contractor made mistakes or errors c) selling leveraged) to indicate where lines are for future additions or repairs - Correct answer -To indicate where lines are for future additions or repairs What is the maximum size of a bed joint in a masonry wall directly on the foundation? a) 3/8 inchb) 3/4 inch c) 1/2 inchd) 1/4 inch - Correct answer -3/4 inch
How is a post hole dug? a) 3 time wider on the top than the bottom b) about one third larger on the bottom than the topc) about one third larger on the top than the bottom d) same size on the top and bottom - Correct answer -About one third larger on the bottom than the top
A trench has been prepared for a gray water irrigation line, according to the international residentialcode, what shall be the minimum depth of the filter material beneath the perforated line?
a) 3 inchesb) 6 inches c) 12 inchesd) 8 inches - Correct answer -6 inches (IRC P3009.10.5)
What kind of screw resists rusting? a) steel b) Phillipsc) brass d) fine thread - Correct answer -Brass "Weep holes" may be utilized in which of the following methods of change in site grading? a) stone rip rapb) timber cribbing c) retaining wallsd) earth embarkment - Correct answer -Retaining walls
All piping used for gray water shall be marked_____ a) danger-unsafe water b) non-potablec) bad water d) reclaimed water - Correct answer -Danger-Unsafe Water
What is the spacing for metal joint bracing of a masonry wall? a) every 18 inchesb) every 12 inches c) the entire length of the walld) every 6 inches - Correct answer -The entire length of the wall
What effects does higher pressure have on wire size? a) it has no effect b) increases amps neededc) increases voltage needed d) decreases amps needed - Correct answer -increases amps needed Which finish is best used when subject to regular dampness? a) keeness cement finishb) Portland cement plaster finish c) putty finishd) sand finish - Correct answer -Portland cement plaster finish
Fertilizer consists of______ a) nitrogen, phosphoric acid and potassium b) nitrogen, oxygen and carbonc) nitrogen, phosphoric acid and potash d) bone meal, ammonia and organic filler - Correct answer -Nitrogen, phosphoric acid and potash
On a long run over 100 feet from a low voltage transformer, what size wire would be best suitable? a) 18- b) 10-2c) 12- d) 16-2 - Correct answer -12- what is fixed reference point called when doing a survey? a) landmarkb) reference position c) rod positiond) benchmark - Correct answer -benchmark
You have 2 BCY of sand, after compaction you will have? a) 3.0 CCY b) 1.96 CCYc) 1.75 CCY d) 2.24 CCY - Correct answer -1.96CCY of sand is 0. 2*0.95 = 1. What technique is used for planting trees but is not normally used when planting shrubs? a) wateringb) staking c) mulchingd) soil conditioning - Correct answer -staking
c) 12 icnhes d) 18 inches - Correct answer -6 inches What is the purpose of humus? a) to increase water retentionb) to aid in compaction c) to replace sulfurd) to decrease water retention - Correct answer -to increase water retention
When fertilizing the southwestern garden, among chemical fertilizers, the __ analysis is used most often. a) 5-10- b) 20-10-10c) 4-10- d) 4-12-4 - Correct answer -4-12- What would you add to soil to increase its' pH value? a) limeb) sulphate c) chelating agentd) wetting agent - Correct answer -Lime
What is the minimum grade needed for proper drainage? a) less than 1% b) 1% or greaterc) less than 3%
d) 3% or greater - Correct answer -3% or greater Many shrubs are planted for their flowering qualities and must be pruned at the proper time to realizetheir maximum potential for flowering. Spring flowering shrubs should be pruned in____
a) fallb) early spring c) late springd) later summer - Correct answer -early spring
What causes a pop-up riser to rise? a) timer b) electric currentc) suction d) water pressure - Correct answer -Water pressure How long do you need to wait before setting the second course on the base? a) 2 hoursb) 1 hour c) no waitingd) 1 day - Correct answer -1 hour
Refer to the illustration, which of the following shows a 180 degree arc? a) D b) Bc) A
What causes water hammer? a) water coming directly from the main to a valveb) water moving at velocities of over 5 feet per second c) water coming through the valvesd) water moving at velocities of 5 feet per second or less - Correct answer -water moving at velocities of over 5 feet per second What kind of wood does not prevent decay or repel insects? a) treated lumberb) cedar c) redwoodd) pine - Correct answer -Pine
To prevent salt buildup around a plant, wetting patterns are ______ a) misted b) overlappedc) floaded d) subsurfaced - Correct answer -overlapped Which one of the following woods is the best for outdoor use? a) western larchb) eastern white pine c) douglas fird) redwood - Correct answer -Redwood
What is the MINIMUM initial bed joint thickness for placing masonry unit. a) 1/4 inchb) 1/2 inch c) 1 inchd) 3/8 inch - Correct answer -1/4 inch
Which of the following is true about Portland cement? a) it cures best when hot and dry b) it should be kept dry during curingc) it will not cure properly in high humidity d) it should be kept moist during curing - Correct answer -It should be kept moist during curing. What do you use to give a wall strength and stability? a) open pilasterb) sash block c) linteld) channel block - Correct answer -channel block
What should be placed over a drain tile prior to installing a pond liner? a) 4 inches of gravel b) metal gratec) 2 inches of sand d) clean soil - Correct answer -4 inches of gravel
How should the trowel be held against the wall when plastering with Portland cement used for exteriorapplication?
a) 45-degree angle b) flatc) slight angle d)? - Correct answer -Slight angle What is used for drainage in a post hole? a) 6 inches of gravelb) dig a drainage trench c) 4 inches of sandd) cement in the bottom - Correct answer -6 inches of gravel
1/3 = 0. 18 inches x 0.333 = 6 inches What is the minimum required back flow protection? a) pressure vacuum breakerb) reduced pressure principle back flow preventer c) double check valve assemblyd) atmospheric vacuum breaker - Correct answer -atmospheric vacuum breaker
What insect is bad for turf? a) ladybugs
b) miratoad c) fire antsd) scale - Correct answer -scale
What is the minimum PSI of concrete steps exposed to weather? a) 3000 b) 2500c) 3500 d) 1500 - Correct answer -2500 PSI What type of irrigation is the least expensive for covering a small area? a) a fixed systemb) a drip system c) a sprinkler systemd) a portable system - Correct answer -A drip system
How many straps are required on a 4-foot chain link fence? a) 5 b) 2c) 3 d) 4 - Correct answer - Blue stake uses green to mark which of the following? a) Sanitary sewerb) water
