Brown and red colors in subsurface horizons are caused by ________ in the soil
A) aluminum oxides
B) organic matter
C) manganese
D) clay
E) iron oxides
E
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In an insulated concrete block wall, a _____ should be applied to seal off the joint.
A. center bed joint B. head joint C. sled runner joint D. closure block
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The symptom that most likely indicates the thermostatic element of a TXV has lost its charge is _____.
a. a very low suction pressure b. a very high suction pressure c. constant liquid flood-back d. insufficient subcooling
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For most soils, plowing and harrowing every year improves soil tilth in the long run
Indicate whether the statement is true or false
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A counter whose MOD < 2N will have a 50% duty cycle
Indicate whether the statement is true or false
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