The substance in refrigerants that is primarily responsible for damaging the ozone layer is _____.
a. fluorine
b. hydrogen
c. chlorine
d. bromine
c. chlorine
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When using datum targets to establish a complete datum reference frame, which three requirements should be met?
What will be an ideal response?
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What are the visible indicators of a properly cleaned shop?
What will be an ideal response?
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To avoid freezing the water in the chiller during recovery:
A) Add nitrogen to the chiller. B) Turn off the condenser water pumps. C) Circulate the chiller water. D) Operate the chiller.
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A given 4-bit digital to analog converter has a reference voltage of 15 volts and a binary input of 0101. What is the proportionality factor?
A) 15 V B) 1 V C) 5 V D) 1.5 V
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