TGPSC HMWSSB Manager 2015 Paper 2 · Question 2
Question 2 of the TSPSC Manager (Engineering), HMWSSB, 2015: Paper 2 (Civil Engineering) (1 November 2015). Try it first, then open the answer and explanation.
Which one of the following angles can be set out with the help of French cross staff?
- 180°
- 90°
- 45°
- any angle
Show answer
Answer: (3) 45°
A French cross staff is an octagonal tube with sighting slits on all eight faces, so unlike the ordinary open cross staff (which gives only right angles) it can also set out 45° angles. It cannot set out any arbitrary angle; that needs an adjustable cross staff.