Answer the following statements true (T) or false (F)
1. Livestock have been domesticated for about 20,000 years.
2. In general, only the smartest animals survive in the wild.
3. Many of the traits that are essential for survival in the wild prove disadvantageous in domesticated situations.
4. Livestock evaluation is an art and a science.
5. As society becomes more complex, dual-purpose animals are gaining popularity.
1. True
2. False
3. True
4. True
5. False
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The automatic control of a system is intended to ____.
A. maintain the working conditions of the equipment with a controllable device B. evaluate overloading situations C. maintain stable or constant conditions without excessive human interference D. maintain safe operations for service technicians
_____________ is a chemically pure urea and deionized water solution, approximately 33% urea and 67% pure water, that is injected in a special diesel catalytic converter to reduce NOx emissions.
Fill in the blank(s) with the appropriate word(s).
If the suction pressure of a system is 60 psig and the oil pump outlet is 85 psig, what is the net oil pressure?
A. 60 psig B. 25 psig C. 85 psig D. 145 psig
The symbol for a V-groove weld is 
.
Answer the following statement true (T) or false (F)