Which of the following is a true statement?
a. Since shielding gases are not toxic, they do not represent a hazard of any kind.
b. In confined spaces, pure oxygen is the best choice to ventilate the space and push out hazardous gases.
c. Acetylene is heavier than air and collects in any depressed area when it is released.
d. Manganese is a hazardous material found in stainless steel and in some filler metals.
d
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Years of rigorous testing are required to ensure the safety of _____
a. crops c. pesticides b. wells d. wetlands
If you wanted to choose a site for an irrigation project and were primarily concerned that the slope be less than 2%, but also needed soils with good internal drainage and high water holding capacity, you could feed all the relevant soils data into a ________ to help you choose the best site available
A) T.D.R. B) Thematic Mapper C) G.P.S D) G.I.S. E) G.P.R.
When testing a relay using an ohmmeter, which two terminals should be touched to measure the coil resistance?
A) 86 and 87 B) 87 and 30 C) 86 and 85 D) 87a and 87
To prevent mineral buildup and scale on an ice machine:
A) Use an ultraviolet light. B) Test the pH of the incoming water. C) Clean regularly with a chlorine disinfectant. D) Use a water filter to remove suspended solids.