Why is it often common to use bar charts and precedence diagrams to depict schedules on the same construction project?
What will be an ideal response?
Bar charts are an ideal way to communicate with a universal audience. Bar
charts are clear representations of when activities are to Occur. If projects were built
as they were originally scheduled, there would be little need to use any other
scheduling tools. Unfortunately, schedules are rarely exact portrayals of how projects
are actually completed. Updating is almost always a scheduling requirement as some
activities are delayed and others run ahead of schedule. Changes are also commonly
made to projects and these must also be reflected in the schedule. Precedence
diagrams are a convenient way of incorporating changes in the schedule and they are
also a convenient way of updating the schedule.
Also, since most scheduling software easily toggles between precedence diagrams
and bar charts, it is very convenient to use the format of the schedule that is most
applicable at the time. As a result, it is easy to use bar charts for one purpose and
quickly convert the schedule to a precedence diagram for another purpose.
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What two functions does the evaporator of a domestic refrigerator perform?
A. Filters and cools the air. B. Absorbs and dissipates heat. C. Humidifies and cools the air. D. Dehumidifies and cools the air.
A synchronous motor is rated at 100 kVA. The motor is connected to an infinite bus of 5 kV. The synchronous reactance of the motor is 0.1 ?. The motor is running at a no-loading condition (real power output is zero). All losses can be ignored. Calculate the equivalent field voltage Ef that operates the motor as a synchronous condenser delivering 100 kVAR to the infinite bus. Draw the phasor diagram. (A synchronous condenser produces reactive power and no real power.)
What will be an ideal response?
A marketing manager samples 150 people and finds that 87 of them have made a purchase on the internet within the past month.
a. Estimate the proportion of people who have made a purchase on the internet within the past month, and find the uncertainty in the estimate. b. Estimate the number of people who must be sampled to reduce the uncertainty to 0.03.
Each branch in a four-branch parallel circuit carries 10 mA. If one of the branches opens, then the current in each of the other three branches equals ________
A) 10 mA B) 13.33 mA C) 0 A D) 30 mA