Question

How many types of bench mark are there?

(a) 3

(b) 2

(c) 5

(d) 4

This question was addressed to me by my college director while I was bunking the class.

I would like to ask this question from Basic Surveying Terms in chapter Basic Surveying of Basic Civil Engineering

Answer 1

Correct choice is (b) 2

For explanation: Bench mark is an object bearing a marked point whose elevation above or below a datum is known. The 2 types are the temporary and permanent bench mark.