In zoning systems with multiple stages of cooling, which of the following is most likely to determine when
the second stage begins to operate?
a. The amount of superheat in the suction gas returning to the condensing unit.
b. The amount of subcooling in the liquid leaving the condensing unit.
c. The difference between the supply and return air temperatures.
d. The length of time the first stage has operated without satisfying the space.
d
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Technician A says electronic transmissions control shifts by directing the shift solenoid output pressure to the bands and clutches. Technician B says electronic transmissions control shifts by directing the shift solenoid output pressure to the shift valves. Who is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Which of the following best describes the function of a converter dolly?
A. converts a full trailer to a semi-trailer B. converts a semi-trailer to a full trailer C. allows trailer payload to be increased D. usually couples a trailer directly to a tractor
A family of logic devices designed for extremely high speed applications is called
A) PMOS. B) NMOS. C) TTL. D) ECL.
It is important to provide employees with training in the proper use of the eye protection devices.