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In an old survey performed in 1965, a line AB had a magnetic bearing of S 75 10' W when the magnetic declination was 4° 30' west. In a new survey performed in 1987, the declination in the same locality changed to 2 50' east. The magnetic bearing of AB in 1987 should be a. S 67 50 W b. S70°40' W c. N 67 50' E

In an old survey performed in 1965, a line AB had a magnetic bearing of S 75 10' W when the magnetic declination was 4° 30' west. In a new survey performed in 1987, the declination in the same locality changed to 2 50' east. The magnetic bearing of AB in 1987 should be a. S 67 50 W b. S70°40' W c. N 67 50' E

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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In an old survey performed in 1965, a line AB had a magnetic bearing of S 75 10' W when the magnetic declination was 4° 30' west. In a new survey performed in 1987, the declination in the same locality changed to 2 50' east. The magnetic bearing of AB in 1987 should be a. S67°50' w b. s70°40' W c. N 67 50' E A 30-m steel tape weighing 1.45 kg is of standard length under a pull of 5 kg, supported for full length. The tape was used in measuring a line 938.55 m long on smooth level ground under a steady pull of 10 kg. Assuming E = 2.0 x10° kg/cm and the unit weight of steel to be 7.9 x1o °kg/cm, determine the correct length of the line measured. a. 948.1 m b. 938.59 m C. 950 m A type of survey which is of wide extent and takes into account the spheroidal shape of the earth is known as a. earth surveying b. plane surveying c. geodetic surveying O O
Transcribed Image Text:In an old survey performed in 1965, a line AB had a magnetic bearing of S 75 10' W when the magnetic declination was 4° 30' west. In a new survey performed in 1987, the declination in the same locality changed to 2 50' east. The magnetic bearing of AB in 1987 should be a. S67°50' w b. s70°40' W c. N 67 50' E A 30-m steel tape weighing 1.45 kg is of standard length under a pull of 5 kg, supported for full length. The tape was used in measuring a line 938.55 m long on smooth level ground under a steady pull of 10 kg. Assuming E = 2.0 x10° kg/cm and the unit weight of steel to be 7.9 x1o °kg/cm, determine the correct length of the line measured. a. 948.1 m b. 938.59 m C. 950 m A type of survey which is of wide extent and takes into account the spheroidal shape of the earth is known as a. earth surveying b. plane surveying c. geodetic surveying O O
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