Surveying Test ...

A 30 m metric chain is found to be 0.1 m too short through out the measurement. If the distance measured is recorded as 300 m, then the actual distance will be

In measuring a round of angles at a station, the third angle ‘c’ closing the horizon is obtained by subtracting the two measured angles a and b from 360°. If angle a has a standard error of ± 2^’’ (seconds) and angle b as a standard error of ± 3^’’(seconds), what is the standard error of angle c (in seconds)?

Match list I (Corrections) with list – II (Name) and select the correct answer using the codes given below the list:

While measuring an angle ‘O’ of the traverse, multiples reading was recorded for obtaining an accurate observation. Following are observed values:

A plot of land 60 m × 20 m is measured by a steel tape. If the standard error of length and width measurements is taken as ± 1 cm, then the standard error of the area of the plot would be

Ashwin conducted linear measurement between two points and found the distance to be 100 m and an area of 100 m² . He marked a scale of 1 cm = 1 m on the map. Later he detected that he used a wrong scale of 1 cm = 50 cm. A new surveyor modified the data and obtained the following results. Which one of the following is/are correct?

A 20 m copper tape was standardized 50 N pull at 77° F. It was suspended in 5 equal spans during measurements. The temperature during the measurement was 95° F, the pull exerted was 75 N. The area of cross-section of tape was 10 mm². The unit weight of tape is 89.6 kN/m², coefficient of thermal expansion (∝) = 9.4 × 10^-6/F, Young’s modulus of elasticity (E) = 128 GPa.

The length of tape available is ________ (in m).

If the value of a smallest division of a circle of a repeating theodolite in 20’. Calculate the number of divisions of vernier so that it can read 5”.

A surveyor opens an old map plotted to a scale of 10 metres to 1 cm. He used the planimeter to found the area of the plan and measures it as 135.6 cm². He further realized that the plan or sheet is found to have shrunk, such that a line 20 cm long now measures 19.1 cm only. Calculate the true area of the survey on the ground. Calculate your answer in m².