Answer to Question #247726 in Civil and Environmental Engineering for AYSANEW

Question #247726

the standard length of the tape was known to be 30.015 at 25 c and 50 N tensions whose normal length is 30m. the tap was is used to measure a base line suspending it between supports and the following measurement were recorded:-

measured length =92.441

elevation difference between the two extreme ends = 4.482m

mean temperature =23 degree C

Cross- sectional area of the tape 1.7mm squire

Tension applied =25 N

weight of the tape = 3.4N

calculate the corrected horizontal distance of the base line if young's modulus of the tape material is 2*100000N/mm squire AND THE coefficient of thermal expansion of the tape is 1.12*1000000/C degree so/N

Expert's answer

A 30 m tape weighing 8.9 N and has a cross sectional area of 2.58 mm2 was standardized and found to be 30.005 m at 20" C with 52 N tension at fully supported condition. This tape was used for mearsuring the distances at contant temperature of 31.2" C and pull applied 110 N. The tape was supported at 0 and 30 m end.

The corrected horizontal observed distance will be 630 m

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