Worldâs first parking meter installed. Share this: The worldâs first parking meter, known as Park-O-Meter No. 1, is installed on the southeast corner of what was then First Street and Robinson Avenue in Oklahoma City, Oklahoma on this day in 1935. The parking meter was the brainchild of a man named Carl C. Magee, who moved to Oklahoma City from New Mexico in 1927.
Check rate of air pressure buildup: When the engine is at operating RPM, the pressure should build from 85 to 100 psi within 45 seconds in dual air systems. (If the vehicle has larger than minimum air tanks, the buildup time can be longer and still be safe.
The relative humidity for an indoor environment should remain at most 60 percent; however, 50 or lower is ideal, according to HVAClean. Humidity levels higher than 60 cause mold to grow inside air ducts.Mold growth potentially leads to respiratory problems and allergies. Running a thermostat constantly in the On position is hard on cooling units. Freon gas cools the evaporator, but with a consistent flow of air the coils are unable to stay cool.umidity levels higher than 60 cause mold to grow inside air ducts. Mold growth potentially leads to respiratory problems and allergies. Running a thermostat constantly in the On position is hard on cooling units.