Question

Answer by stating either “True” or “False” in the space below and provide the correct statement/answer if “False”.

6)A common way to find a right angle is by using the 3-4-5 method.

7)If the reading from the upper hairline of a level telescope is 1.520m and lower hairline reading was 1.360m, then the distance where those readings are located is 14 metres away.

8)If the reading from the Top Hair/Line of a level telescope is 2.716m and Bottom Hair/Line reading was 2.630m, then the middle hairline should be 2.470m.

9)A levelling job with 6 total stations used while collecting level readings, has an allowable error of ±7mm.

10)In earthwork symbols, the sign positive is given where there is filling to do and, the sign negative is given where cutting and removing of earth is required.

Answer 1

6.

3-4-5 method is common way to find right angle

Therefore, given statement is TRUE

7.

Distance,D = KS +C

D = 100{1.52-1.36}+0 = 16 m

Therefore given statement is FALSE.

8.

Middle hair reading = { Top hair reading + bottom hair reading}/2

= {2.716+2.630}/2

=2.673 m

Therefore give statement is FALSE.

9.

Given statement is FALSE.

10.

In earthwork symbols, the sign positive indicates filling , the sign negative indicates cutting and removing of earth.

Hence given statement is TRUE.