An engine dynamometer measures torque (lb-ft), not mechanical energy (ft-lb); and an engineâs âtimeâ is expressed in revolutions per minute (rpm). Since 6.28 ft-lb of work is about equal to 1 lb-ft of torque, you can substitute the eqautions in Figure 2.
DEF weighs approximately 9 lbs per gallon. Compared to diesel fuel at approx 7.05 lbs and gasoline at an average of 6.19 lbs, DEF is a relatively heavy product.ow much DEF can I haul? With DEF weighing in at around 9lbs per gallon, we estimate that with a tandem axle truck tank you will be able to haul just over 3000 gallons in most states. For trailers the capacity will be around 5,000 gallons.
How much does a gallon of sand weigh?   Answer     I weighed a cup of sand which equalled 12.45 ounces (used 12.5 ounces for computing purposes). So, 1 gallon of sand (16 cups) equals 200 ounces or dâ¦ivided by 16 ounces/pound, equals 12.5 pounds/gallon. Making the world better, one answer at a time.