What is meant by the term "blow down"?
What will be an ideal response?
Water constantly drains from the sump of a cooling tower or evaporative condenser to keep the mineral concentration in the sump water to a minimum.
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What does the acronym CAN stand for?
What will be an ideal response?
An SQO sequencer with a 48 bit word length is needed where data starts at N7:20, length is 12, and the least significant output bit is O:1.0/0. Which one of the following statements correctly describes the ladder logic and sequencer configuration used for this application?
A) The three cascaded SQO sequencers would be placed on a single rung in series to link the three 16 bit outputs together. B) The three cascaded SQO sequencers on a single rung would have identical parameter values in the mask, control, length, and position elements. The starting field address for upper 16 bits would be N7:20, the middle 16 bits would be N7:35, and the lower 16 bits would be N7:50. The destination addresses from MSBs to LSBs would be O:1.0, O:2.0, and O:3.0. C) The three cascaded SQO sequencers on a single rung would have identical parameter values in the mask, control, length, and position elements. The starting field address for upper 16 bits would be N7:50, the middle 16 bits would be N7:35, and the lower 16 bits would be N7:20. The destination addresses from MSBs to LSBs would be O:3.0, O:2.0, and O:1.0. D) The three cascaded SQO sequencers on a single rung would have identical parameter values in the field, mask, destination, control, length, and position elements.
List six factors that must be considered in order to establish the proper location for the condensing unit of a split residential central air conditioning system.
What will be an ideal response?
Adding 3/8" (9.5 mm) of Portland cement parging to the exterior side of a wall will _____ proof it.
A. water B. damp C. erosion D. ice