To close the control circuit and start a system, a remote bulb thermostat depends on a _____
A) bimetal strip that expands or contracts
B) refrigerant-filled bulb that responds to temperature changes
C) mercury-filled bulb that responds to temperature changes
D) thermocouple that changes its resistance as the temperature changes
Answer: B
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A type of conduit that has a wall thickness less than that of RMC but thicker than EMT is _____.
a. PVC b. HDPE c. IMC d. LFNC
Gasoline fumes are less flammable than liquid gasoline.
Answer the following statement true (T) or false (F)
Not all cost or all benefits can be simply reduced to monetary terms, when calculating ROI
Indicate whether the statement is true or false
Which of the following statements is correct regarding the ozone depletion potential (ODP) of refrigerants?
A. CFC and HFC refrigerants have the same ODP B. HCFC refrigerants have higher ODPs than CFC refrigerants C. CFC refrigerants have higher ODPs than HFC refrigerants D. CFC refrigerants have an ODP of zero