1 A ratio variable, has all the properties of an interval variable, and also has a clear definition of 0.0. 2  When the variable equals 0.0, there is none of that variable. 3  Variables like height, weight, enzyme activity are ratio variables.4  Temperature, expressed in F or C, is not a ratio variable. A ordinal variable, is one where the order matters but not the difference between values. 2  For example, you might ask patients to express the amount of pain they are feeling on a scale of 1 to 10. 3  A score of 7 means more pain that a score of 5, and that is more than a score of 3.
Also be sure a hole has not been punched in the bellows as this will cause a vacuum leak. The second thing that causes breaker to blow is simply an old worn out electric pump motor, especially in salt water applications. The third cause is that the holding tank is full and the vent line is plugged.
Overfilling the tank can cause vapor lock in the fuel line, damage to the fuel pump, your car's PCM to throw false trouble codes, federally required emissions tests to not be run, and in worst cases, the car to catch fire (due to excess vapors around the tank and/or raw gasoline dripping from the vapor vent).onfidence votes 3.6K. Yes. Five percent of your gas tank's volume is reserved, and required, to allow for gasoline vapors to expand. So if you have a 25 gallon tank, the the most it will hold is 23.75 gallons.