Flow elements are described as:
a. devices designed to transmit a signal
b. devices designed to compare a signal and regulate a final control element.
c. devices designed to simulate a situation that can be measured.
d. devices designed to regulate flow.
c. devices designed to simulate a situation that can be measured.
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What will be an ideal response?There are two commonly used scales but the ____________________ scale is the one that is most often used for mechanical welding drawings.
Fill in the blank(s) with the appropriate word(s).
Technician A says a small-hole gauge is also referred to as a transfer gauge. Technician B says the small-hole gauge is used on valve guides. Who is correct?
A. Technician A B. Technician B C. Both technicians D. Neither technician
On rack system controls, why are compressors “stepped” to stop or start?
a. To match which compressors should be running to the load on the rack. b. To bring on compressors according to the discharger pressure. c. To prevent wearing out all the compressors at one time.