Why are electro mechanical control systems often referred to as relay control systems?
What will be an ideal response?
Electromechanical control systems are two position controls that use mechanical switches and magnetically operated devices. Units respond to the presence or absence of 24 volt control power. Relays are common electromechanical controls. When the relay coil receives 24 volts, its contacts close to operate a motor or other controls.
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A. heat from a furnace B. an air-conditioning system C. the vegetable cooling system of a refrigerator D. the freezer section of a refrigerator
Information that explains a specific part of the construction is shown in the _____.
a. revisions b. general notes c. line indexes d. local notes
In an open feedlot, rainfall does not significantly affect runoff
Indicate whether the statement is true or false.
What is the Volvo service information system known as?
A. IMPACT B. TT C. PTT D. EIS