What chemical family is the basic building block for most modern refrigerants?
What will be an ideal response?
Ans: Hydrocarbons, specifically methane and ethane
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The ____ pressure switch is interchangeable with existing electromechanical pressure switches.
a. sealed piston b. Bourdon tube c. diaphragm d. solid state
Technician A says that a clutch must engage completely, all at once. Technician B says that the clutch must slip slightly during engagement. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Even though our agricultural system is marvelously efficient, it will have to become even more efficient to meet the demands of a growing population
Indicate whether the statement is true or false
Most HVACR systems operate on:
A) Modulating current (MC). B) Direct current (DC). C) Alternating current (AC). D) Natural current (NC).