What personal protective equipment (PPE) is specifically required when cutting cast iron soil pipe?
A. hardhat
B. safety glasses
C. steel toe boots
D. safety harness
Answer: B
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Soil stabilization is the process of preparing sub-base soils to provide a _____.
a. softer soil base b. consistent color and texture c. higher loadbearing capacity d. pozzolan mixture in the soil base
A bushing is the simplest type of bearing.
Answer the following statement true (T) or false (F)
A fluid level switch may fail by sticking in either the open or closed position
Indicate whether the statement is true or false
Why is it necessary to have controls for maintaining a minimum high-side pressure on outdoor air-cooled condensers?
A) Compressors will not operate correctly if the compression ratio is too low. B) The chemical components in the refrigerant will separate if the pressure is allowed to drop below the normal minimum operating pressure. C) The refrigerant will not condense if it is excessively cooled. D) Refrigeration metering devices require a minimum pressure drop to operate.