Muffler (silver) and exhaust pipe on a Ducati 695 motorcycle. A muffler (silencer in English) is a device for reducing the amount of noise emitted by the exhaust of an internal combustion engine.
Quick Answer. Normal blood sugar levels should be  less than 100 mg/dL when fasting and less than 140 mg/dL two hours after eating, according to WebMD. People without diabetes tend to have blood sugar levels of around 60 to 90 mg/dL before eating.
A normal blood glucose level is less than 6.1 mmol/L, when measured after a fast. In general, a normal glucose would be less than 7.8 mmol/L if taken about 2 hours after eating.Within 3 hours of eating, the glucose should be under 6.1 again. normal blood glucose level is less than 6.1 mmol/L, when measured after a fast. In general, a normal glucose would be less than 7.8 mmol/L if taken about 2 hours after eating.