Which of the following pull stations require the user to lift a cover or open a door before operating the pull station?
a. Single-action
b. Glass-break
c. Key-operated
d. Double-action
d. Double-action
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What term refers to the release of energy during a chemical reaction?
A) Exothermic B) Endothermic C) Heterogeneous D) Immiscible
If the suction pressure of an R-22 air-conditioning system is 67 psig and the evaporator outlet temperature is 51°F, what is the evaporator superheat?
What will be an ideal response?
EIFS means _____
a. exterior/interior framing stud b. exterior insulation and finish system c. extended/integrated fascia and soffit d. exterior insulation framing system
Before a disposable refrigerant cylinder can be disposed of it:
A. Must be cleaned B. Must be completely emptied of refrigerant C. Must be filled with compressed air D. Must be flushed with water