The average fuel economy of a semi truck is between 5 and 7 mpg when loaded.
Covering the truckbed of a pickup truck has been shown to increase the aerodynamics of the truck. Thus with the bed covered you will have better fuel efficiency.
A fuel pump siphons the fuel through hoses.
4-8mpg of diesel depending on the year, condition, and modifications to the truck.
You don't. The fuel system draws from both tanks concurrently.
Impossible to answer ! That would depend on the weight of the truck, road conditions, weather, engine efficiency... etc.
Who invented the Semi-truck?
There hasn't really been a brand of semi trucks recognized as the most fuel efficient. Since they run on diesel a more efficient fuel, semi trucks already are more fuel efficient than cars in terms of size and power.
No. Recent advance in technology do not require idling of a semi.
No manufacturer claims their truck to be the most fuel efficient, because there are too many factors affecting this. Such claims are made in regards to the engines, but not to the trucks themselves. Detroit Diesel motors have been traditionally known for their fuel efficiency. Volvo makes a similar claim with their D series motors, although they only seem to live up to those expectations solely under ideal conditions.
If the semi truck knocked on the garbage truck, yes.
You don't put gas in a semi truck - they use diesel.If it's a company owned truck, the company pays for the fuel. Lease/operators and owner/operators who lease on with a company to run under their operating authority pay for their own fuel.
Each tank can be 50 - 150 gallons, depending on customer specifications.