As of 2012, NACE reported that mechanical engineers with a master's degree started at an average of $75,700 -- significantly more than the average starting salary of $61,300 reported by mechanical engineers with a bachelor's degree.
How many gallons does a semi truck hold? Quick Answer. Semi truck fuel tanks vary in size, but they hold an average of 125 to 300 gallons of fuel. There is a fuel tank located on each side of the tractor, and fuel is distributed between the two tanks to balance weight.
A good rate of fuel consumption for a loaded semi is around 6 miles per gallon (MPG), so the average semi can run between 1200 and 1800 miles from one fill up.The average fully loaded semi truck weighs 80,000 lbs.Source(s): I own and operate a small trucking company.s for how much fuel they can take on will depend on the size of the fuel tank. I have 2 140gallon tanks which I can use 137 of those gallons. Energy efficent, that I cant answer with certainty but I like to think my truck is.