What dimensions should be measured in a datum reference frame?
What will be an ideal response?
ANS:
Only dimensions that are related to a datum reference frame through geometric tolerances should be measured in a datum reference frame. If a dimension is not associated to a datum reference frame with a geometric tolerance and basic dimensions relating the feature or feature of size to the datums, then there is no specification on how to locate the part in the datum reference frame.
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The R-value of a concrete tilt-up wall is 1.20. What is its R-value considering air-to-air heat transfer through it?
What will be an ideal response?
Estimate the re-aeration constant assuming the mean depth of the river is 1.5 meters and the mean velocity is 0.1 m/s.
The Ganges River, shown in Figure 4.66, has an annual average flow rate of 12,105 m3/s. The average temperature of the Ganges River was reported to be 24.6ºC. The Ganges has become contaminated with raw sewerage and industrial waste so that the dissolved oxygen in the river upstream of sewerage discharges is 4.6 mg/L. Suppose that the raw sewerage that is untreated flows into the Ganges at a rate of 460 m3/s, the temperature is 25ºC, and the dissolved oxygen in the sewerage stream is completely depleted (i.e. DO = 0). How would you develop a plan for improving water quality in the Ganges River? What will be an ideal response?
List six of the ten items discussed in a formal training period for delivery persons
What will be an ideal response?
Soot accumulation on the heat exchanger is
A) Not possible with a gas furnace B) Caused by incomplete combustion C) Normal over a period of years D) A natural protective layer for the inside of the heat exchanger