The manufacturer of a particular diesel engine recommends when running on heavy fuel for the vanadium content not to exceed 300 ppm. If there are 10 ounces of vanadium per 3125 pounds of fuel just taken on board, which of the following statements is correct?
• Parts per million (ppm) as a ratio or fraction • Converting ounces to pounds to compare like units • Setting up a proportion: amount of vanadium vs. total fuel weight
• How can you express 10 ounces of vanadium as a fraction of 3125 pounds of fuel, making sure both are in the same units? • Once you have that fraction, how do you convert it into parts per million (ppm)? • After finding the ppm, how does it compare to the manufacturer’s 300 ppm recommendation?
• Convert ounces to pounds correctly before doing any ppm calculation. • Check that your ppm value is the ratio (vanadium/total fuel) multiplied by 1,000,000. • Compare your calculated ppm with 300 ppm to decide if it is below, near, or above the recommended limit.
No comments yet
Be the first to share your thoughts!