SLC 500 ladder logic with two cascaded timers ________
A) Has a time delay equal to one timer's delay multiplied by the other timers delay
B) Has one timer's DN bit enabling another timer's input
C) Places the cascade timers in series on the ladder rung
D) None of the above
D
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Answer the following statement true (T) or false (F)
Where rear access is required to work on nonelectrical parts at the back of enclosed equipment, a minimum working space of ____. horizontally is required.
A. 20 in B. 30 in C. 36 in D. 40 in
When leak testing a low-pressure chiller, the pressure should not be allowed to exceed 10 psig to avoid:
A) Opening the high-pressure cutout and shutting the system down. B) Freezing the chiller bundle. C) Breaking the rupture disk and losing the refrigerant charge. D) High compressor current draw.
When jump starting _________
A) The last connection should be the positive post of the dead battery B) The last connection should be the engine block of dead vehicle C) The alternator must be disconnected on both vehicles D) Both A and C