CR-21 Landscapes and Irrigation Questions With Complete Solutions

CR-21 Landscapes and Irrigation Questions With Complete
Solutions


What procedure should be used to install a flagstone patio?

A. Start in the middle and work toward edges

B. Start at the edges and work toward the middle

C. Start at one end and work towards other end

D. Start at the high point and work toward the low point
B. Start at the edges and work toward the middle
You have 2 BCY of sand, after compaction you will have?

A. 1.96 CCY

B.2.24 CCY

C. 3 CCY

D. 1.75 CCY
A. 1.96 CCY

Sand Expansion and Compaction unit is .98
Multiply .98 by 2 BCY to get 1.96 CCY

,What causes a pop up riser to rise?

A. Suction

B. Timer

C. Water Pressure

D. Electric current
C. Water Pressure
Which of the following causes of water hammer is NOT of
concern in a typical irrigation system that uses a well as a water
source?

A. Trapped air in long pipe runs

B. Reverse flow when the pump stop s

C. Uncontrolled flow velocity in empty pipes

D. Valve closure
A. Trapped air in long pipe runs
How many cubic feet of concrete are need for a 4 inch pad that
measures 8x20 foot?

A. 640

,B. 53.28

C. 160

D. 1.97
B. 53.28
When a specific depth of soil is removed on a site, what is this
called?

A. Leveling

B. Banking

C. Cutting

D. Filling
C. Cutting
What is the maximum allowable crack in an expansion joint?

A. 1/4 inch

B. 1/16 inch

C. 3/8 inch

D. 1/2 inch
C. 3/8 inch

, What should be added to the soil if it has a high PH level?

A. Limestone

B. Sodium Nitrate

C. Ammonia

D. Sulfur
D. Sulfur
Given: The composition of chemical fertlizers is written on the
package by three numbers representing percentages of the
elements in the total package. What chemical are in a fertlizer
23-6-3?

A. 23% nitrogen, 6% Phosphoric acid, 4% potash

B. 23% Phosphoric acid, 6% Nitrogen 4% Potash

C. 23% nitrogen 6% potash 4% phosphoric acid

D. 23% nitrogren 6%lime 4% potash
A. 23% nitrogen, 6% Phosphoric acid, 4% potash

ALWAYS SHOWS AS NITROGEN - PHOSPHORIC ACID-
POTASH