An absorbing dynamometer acts as a load that is driven by the prime mover that is under test (e.g. Pelton wheel). The dynamometer must be able to operate at any speed and load to any level of torque that the test requires.
While some causes are obvious, such as hurricanes and snow melt, many are not. Heavy Rains: Cresting rivers, backed-up storm drains, or saturated ground can cause significant floods. Heavy rains can contribute to flash floods, which are the number one weather-related killer in the United States. A flash flood is a rapid flooding of low-lying areas in less than six hours. Heavy rains also increase the chance of mudflows, rivers of liquid, and flowing mud.
1 Most natural disasters are caused by weather. 2  Weather disasters can be caused by hurricanes, tornadoes, floods, tsunamis, thunderstorms, wind storms, wildfires, avalanches, and blizzards.3  Some of the weather disasters can be predicted such as hurricanes and blizzards. Some wildfires are caused by lightning, but some are caused by people. 2  Flooding is the worldâs most expensive type of natural disaster because the damage can be so extensive. 3  Earthquakes are the deadliest of all natural disasters. 4  Some kinds of disasters are more common in some places than in others.