What is the type of gas that is created as a byproduct of other manufacturing processes?
A) Manufactured gas B) Natural gas C) Liquid petroleum D) Propane
A
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Evaporative cooling systems work by:
A) Evaporating refrigerant inside a component called an evaporator. B) Evaporating HFC refrigerants into the air, which reduces the temperature. C) Evaporating the heat out of the air which makes the heat disappear. D) Evaporating water, which reduces the temperature of the air.
Answer the following statement(s) true (T) or false (F)
1. Time is a fundamental dimension and plays an important role in our daily life in describing events, processes, and many occurrences in our surroundings. 2. Most engineering problems may be divided into two broad areas: steady and unsteady. 3. The problem is said to be steady when the value of a physical quantity under investigation changes over time. 4. Because it takes the earth 24 hours to complete one revolution about its axis, every 15 degrees longitude corresponds to 1 hour.
The box-like container in which a sand mold is prepared is called a ____________________.
Fill in the blank(s) with the appropriate word(s).
A counter is required to keep track of information produced by an __________ optical encoder.
A. incremental B. absolute