Technician a says that diesel fuel has more heat energy than gasoline. technician b says that grade #2 is the grade recommended for normal service in which technician is correct?

The statement uttered by technician A is correct.

Explanation:

The amount of heat energy produced by the diesel fuel is approximately 11 percent more than that produced by gasoline. Also, the amount of carbon dioxide produced after burning diesel in the engine chambers is more by 11 percent than the gasoline. Though the diesel fuel produces more heat than gasoline does, it is not considered to be as efficient as gasoline as the calorific value of diesel is less than gasoline

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.