When work is completed under the original estimate, the major problem is _____
a. material costs are not accurate
b. poor historical data
c. bids are not competitive
d. profits are limited
c
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Which of the following is true of the refrigerant exiting the condenser in an A/C circuit?
A. exits cooler than it entered and in a gaseous state B. exits warmer than it entered and in a gaseous state C. exits cooler than it entered and in a liquid state D. exits warmer than it entered and in a gaseous state
The elapsed time between the instant a deviation of the controlled variable occurs in a closed-loop, and when the corrective action begins is referred to as the __________.
A. time lag B. pure lag C. dead time
We need not only physical dimensions to describe our surroundings but also some way to scale or divide these physical dimensions.
a. True b. False
What is the purpose of cooling tower fill material?
A) provides a growing surface for algae and plants that help clean the water B) increases the rigidity of the cooling tower structure C) slows the falling water and increases the surface exposure for evaporation D) filters out dirt and debris from the cooling tower water