GATE 2023 Surveying Quiz 56

A survey opens an old map plotted to a 10 m to 1 cm scale. He used a planimeter to find the plan's area and measure it as 124 cm². If he further realized that the plan or sheet had shrunk, a line 20 cm long now measured 19.04 only. Then the true area of the survey on the ground is ______ m².

Reconnaissance survey for determining feasibility and estimation of scheme falls under the classification based on the.

In general, the CORRECT sequence of surveying operations is

In one of the principles of survey, i.e., working from whole to part, larger measurement (base line) are taken first with………..

A steel tape was exactly 30m long at 20°C when supported throughout its length under a pull of 10 kg. A line was measured with this tape under a pull of 15kg and at a mean temperature of 32°C and found to be 780m long. The cross-sectional area of the tape = 0.03 cm². And its total weight = 0.693 kg, α for steel = 11 × 10^–6 per °C and E for steel = 2.1 × 10⁶ kg/cm². Compute the actual length measured by the tape (up to two decimal places) if it was supported at every 30m during measurement, in meters).

The length of a survey line was measured with a 20 m chain and was equal to 1200m. As a check, the length was again measured with a 25m chain and was found to be 1212 m. On compassing the 20m chain with test gauge- length, it was 1 decimeter too long.

The 25 m chain was ______ cm too short (Round of to 1 decimal places)