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Neotech Technical Campus Neotech Institute of Technology

Academic Year 2013-14 Semester : 1

Name of Subject: Elements Of Civil Engineering (2110004) Assignment No.: 7 Name Of Faculty: Ruchi P. Barve

Sr. No.

Questions Marks

Q.1 Define: Perpendicular offset and oblique offset

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Q.2 What is ranging? Enumerate various methods of ranging? Explain with neat sketch the procedure for indirect ranging?

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Q.3 Explain and state the uses of Steel arrow & Optical square in linear measurements

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Q.4 A line was measured with a steel tape which was exactly 30m long at 18oC and found to be 452.343m. The temperature during measurement was 32oC. Find the true length of line. Take coefficient of expansion of the tape per oC =0.0000117.

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Q.5 A steel tape was standardized as 30.00m at 18oC temperatures. A line was measured as 480.0m at mean temperature of day as 30oC. Calculate the true length of line, if coefficient of thermal expansion for steel is 0.000012 per oC rise in temperature.

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Q.6 A steel tape was exactly 30.00 m long at 20o C and when supported throughout its length

under a pull of 9 kg. A line was measured with a tape under a pull of 14.00 kg and found to be 1800.00m. The mean temperature during the measurement was 36oC. Assuming the true length of the line, given that cross-section area of the tape =0.05 cm2. The weight of 1 cm2 of tape is 0.0087 kg. The co-efficient of expansion =0.000012 per 1oC and the Modulus of Elasticity = 2.1 x 106 kg/cm2.Find the corrected measured length.

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Q.7 The length of a chain line when measured with a 20m chain was found to be 1432 meters.

But when a 30m chain which was 0.65 meter too short was used for the purpose, the line was found to be 1445 meterlong. Find the error in 20m chain?

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Q.8 What are the corrections required in linear measurement? Explain any one in detail. OR Discuss different types of tape correction by giving its formulas Corrections required in linear measurement are

(1) Chain correction (2) Tape correction

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