6) What is the name of the level that does not require any protection from the sun?

7) What is the name of the staff used while the sights are long and the reading viewed through instrument?

8) What is the name of the staff 3m long and the band fitted is graduated in mm used for precise levelling?

9) What is the smallest graduated division in levelling staff?

10) What is the message to indicate the movement of leftarm over 90 Degree?