Question

The length of the ‘Engineer Chain’ is
A. 100ft
B. 80ft
C. 20ft
D. None of these

Answer 1

Hint: An engine chain is used to measure the surveyor’s instrument consisting of feet. It is known as a chain.

Complete answer:
A chain 100 feet long consisting of one-foot links. The Surveyor’s chain is also called Gunter’s chain, measuring a device and the arbitrary measurement.
The length of the revenue chain is 33ft long. It consists of 16 links with each link length approximately 2ft.
The metallic tag is fixed at various individual points of that chain to facilitate the quick reading of a chain in surveying the measurement. Metric chains are either of 20m or 30 m in length. The one meter is divided into five links each of the 0.2m. The least count of metric chain is 0.2m
Most commonly used as a 20m chain. Tallies are provided at every 2m of the chain for quick reading. Every link of this type of chain is 0.2m. The total length of the chain is marked on the brass handle at the ends.
American surveyors used this chain of 100m long.

So, the correct answer is “Option A”.

Note: The basic principle of the chain surveying is triangulation. This means that the area to survey is spilled into the number of the small triangles which should be good in condition. In the chain, surveying the side of the triangles is measured directly from the field by chain or that tape and no angular measurements are used.