PE Civil Engineering Exam Prep

Category - Civil Engineering

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What is the amount of tension that should be applied to the spring balance of the end of a steel tape to yield the proper tension to the 75-ft increment? (Assume the final measurement in the line of tape is 75 ft and the normal 100-foot tape tension is 10 lbs.)

7.5 lbs
10 lbs
75 lbs
None of the above

Explanation

Answer: A - 7.5 lbs of tension should be applied to the 75-ft increment of tape.

Solution: Use the steel tape correction factor applied to the length of measurement

Tension = 10 lbs / 100 ft = 0.1 lb/ft

Correction = 0.1 lb/ft x 75 ft = 7.5 lbs

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