Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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The weight of a steel bar that is 12'6" long and weighs 40 lbs is most nearly:

2.5 lbs
3.2 lbs
3.5 lbs
4.0 lbs

The correct answer is: 3.2 lbs

To determine the weight of the steel bar in relation to its length, it’s essential to consider the weight per foot or per unit of measurement. The steel bar in question measures 12 feet and 6 inches, which can be converted into decimal feet. Knowing that 6 inches is half a foot, the length becomes 12.5 feet. Now, if the total weight of this bar is 40 pounds and it measures 12.5 feet, we can compute the weight per foot. Dividing the total weight (40 lbs) by its length (12.5 feet) gives: 40 lbs ÷ 12.5 ft = 3.2 lbs/ft This means the steel bar weighs approximately 3.2 lbs for each foot of its length. The correct answer correctly identifies that weight as 3.2 lbs, which aligns with the calculated weight per foot for the specified length of the bar. Understanding this calculation is crucial for estimations of material weights in various applications, particularly in engineering and industrial contexts where precise measurements are important for safety and functionality.