Explain how a wet-bulb thermometer works.
What will be an ideal response?
?Wet-bulb temperature is measured by a thermometer with a wick on the end that is soaked with distilled water. Both the wet-bulb and dry-bulb temperature readings are obtained at the same time by using an instrument referred to as a psychrometer. Some psychrometers are referred to as sling psychrometers that require that the thermometers be spun in an airstream. The wet-bulb thermometer will get cooler than the dry-bulb thermometer because of the evaporation of the distilled water. If the surrounding air is very dry, the moisture will evaporate quickly, causing the wet-bulb temperature to drop lower.
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Name an additional benefit of the tower-mounted web-based camera(s) on a construction site, other than providing 24×7 imagery of the construction progress.
What will be an ideal response?
In which of the following conditions is EGR NOT commanded?
A) Cold engine B) Idle C) Wide open throttle D) All of these are correct
Which of the following statements is true about these systems?
A) The R410a system can operate at half the suction line pressure as the R-22 system. B) The R-22 system can operate at twice the suction line pressure as the R-410a system. C) The R-410a system can operate at twice the suction line pressure as the R-22 system. D) The R-22 system can operate at the same suction line pressure as the R-410a system.
____ is provided at the end of the note.
A. The pitch diameter B. The depth of internal threads C. The length of external threads D. both b and c E. none of the above