Discuss what the conversion of farm land to nonfarm use implies about the erosion problem
What will be an ideal response?
As many as 8,000 acres of U.S. farmland is converted to nonagricultural use daily. Construction on such sites
increases the magnitude of the erosion problem. Paved areas present severe runoff problems unless the more expensive
porous paving asphalt is used
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Which of the following is used to measure the current flowing through the circuit to help determine the approximate load condition of a motor or the operating load of a circuit?
a. ohmmeter b. voltmeter c. ammeter d. thermocoupl
You are asked by the city engineer to estimate the AADT on a highway using short term volume counts and data from a nearby continuous count station (using the data in Tables 4.6, 4.7, and 4.8). The city engineer gives you results of a three-hour study conducted the previous June, and asks you to combine this data with a new three-hour count you just conducted. Estimate the AADT for this road using all the available data below.
Collected on a Tuesday in June 7:00–8:00 a.m. 605 8:00–9:00 a.m. 755 9:00–10:00 a.m. 952 Collected on a Thursday in September 1:00–2:00 p.m. 1,714 2:00–3:00 p.m. 1,820 3:00–4:00 p.m. 1,844 What will be an ideal response?
Which of the following best characterizes the field capacity of a soil?
A) soil with water potential of -1500 kPa B) maximum capacity of a soil to hold water C) a wetted soil prior to the removal of the gravitational water D) water content of a soil with water potential of about -10 kPa E) the total capillary water in a soil
The term open and closed are used to describe switch positions. When a switch is closed
A) Voltage can be read from one side of the switch to the other B) Current may pass through the switch C) It is no longer part of the circuit D) Current may not pass through the switch