Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 46)
46.
The sensitiveness of a level tube decreases if
radius of curvature of its inner surface is increased
diameter of the tube is increased
length of the vapour bubble is increased
both viscosity and surface tension are increased.
Explanation:
No answer description is available. Let's discuss.
Discussion:
16 comments Page 1 of 2.

Meera Krishna said:   3 years ago
I think due to increase in viscosity and surface tension, the length of the bubble decreases (as the liquid tends to become more spherical shape). Since the length of bubble decreases, the sensitivity also decreases. So, option D is correct.
(2)

MJM GCEK said:   3 years ago
Sensitivity is L/R which means it is directly proportional to the length and inversely proportional to the radius of curvature soo A is the correct answer.

Option D is completely wrong as they are directly proportional to sensitivity.
(1)

Oyke mallick said:   8 years ago
Right option is D because we know sensitiveness is also increased by the increase in the length of the bubble and by a decrease of viscosity and surface tension of the liquid in the level tube ref.

Book C. L Kochher page 261.

If surface tention decrease with rise of temperature, and viscosity decrease with rise temperature then why sensitivity of bubble tube get decrease whether it's inversely proportional to viscosity and surface tention?

Actually, all are correct. But viscosity is very important, in bubble tube which others depend on it. So D.

Anil said:   5 years ago
Sensitivity increases with decrease in viscosity of the liquid.

Sensitivity = d|r.

Batman said:   8 years ago
Right @Deepak.

The correct answer is A, as sensitivity is l/r.

Ravi raja said:   7 years ago
In formula, R stand for the radius of curvature of bubble Tube.

Mayank mehra said:   4 years ago