What is the difference between PSI and PSR?
What will be an ideal response?
PSI (present serviceability index) is a value for pavement condition
determined as a surrogate for PSR (present serviceability rating) and is based on
physical measurements. PSR is a number grade given to a pavement section based
on its ability to serve traffic. It is established by observation and requires judgment
by trained personnel. Therefore, PSR is subjective, while PSI is objective.
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How does the mowing height of turfgrass affect the water needs of a lawn?
What will be an ideal response?
Which of the following cells are NOT considered environmentally friendly?
A. NiCad B. NiMH C. Li-Ion D. Ultra-capacitors
The symbol for the period of a wave form is:
A) P. B) W. C) T. D) F.