# Surveying Questions and Answers – Levelling – Degree of Precision

This set of Surveying Problems focuses on “Levelling – Degree of Precision”.

1. The degree of precision does not depend upon the type of instrument.
a) true
b) false

Explanation: The degree of precision depends upon the type of instrument, skill of observer, character of country, atmospheric conditions.

2. For a given instrument and atmospheric conditions, the precision depends upon the number of setups.
a) true
b) false

Explanation: For a given instrument and atmospheric conditions, the precision depends upon the number of setups and also upon the length of sights.

3. The precision on plains will be less than that on hills.
a) true
b) false

Explanation: For a given instrument and atmospheric conditions, the precision depends upon the number of setups and also upon the length of sights. Thus, the precision on plains will be less than that on hills.

4. The degree of precision depends upon the skill of an observer.
a) true
b) false

Explanation: The degree of precision depends upon the type of instrument, skill of observer, character of country, atmospheric conditions.

5. What is the error in feet for rough levelling for reconnaissance or preliminary surveys?
a) 0.4×√M
b) 0.1×√M
c) 0.05×√M
d) 0.017×√M

Explanation: According to Indian standards error in feet for rough levelling for reconnaissance or preliminary surveys is given as 0.4×√M.

6. What is the error in feet for ordinary levelling for location and construction surveys?
a) 0.4×√M
b) 0.1×√M
c) 0.05×√M
d) 0.017×√M

Explanation: According to Indian standards the error in feet for ordinary levelling for location and construction surveys is given as 0.1×√M.

7. What is the error in feet for accurate levelling for principal benchmarks or for extensive surveys?
a) 0.4×√M
b) 0.1×√M
c) 0.05×√M
d) 0.017×√M

Explanation: According to Indian standards, the error in feet for accurate levelling for principal benchmarks or for extensive surveys is given as 0.05×√M.

8. What is the error in feet for precise levelling for benchmarks of widely distributed points?
a) 0.4×√M
b) 0.1×√M
c) 0.05×√M
d) 0.017×√M

Explanation: According to Indian standards, the error in feet for precise levelling for benchmarks of widely distributed points is given as 0.017×√M.

9. What is the error in mm for rough levelling for reconnaissance or preliminary surveys?
a) 100 × √K
b) 24 × √K
c) 12.0 × √K
d) 4 × √K

Explanation: According to Indian standards, error in mm for rough levelling for reconnaissance or preliminary surveys is given as 100×√K.

10. What is the error in mm for ordinary levelling for location and construction surveys?
a) 100×√K
b) 24×√K
c) 12.0×√K
d) 4×√K

Explanation: According to Indian standards, error in mm for ordinary levelling for location and construction surveys is given as 24×√K.

11. What is the error in mm for accurate levelling for principal benchmarks or for extensive surveys?
a) 100×√K
b) 24×√K
c) 12.0×√K
d) 4×√K

Explanation: According to Indian standards, the error in mm for accurate levelling for principal benchmarks or for extensive surveys is given as 12.0×√K.

12. What is the error in mm for precise levelling for benchmarks of widely distributed points?
a) 100×√K
b) 24×√K
c) 12.0×√K
d) 4×√K

Explanation: According to Indian standards, the error in mm for precise levelling for benchmarks of widely distributed points is given as 4×√K.

Sanfoundry Global Education & Learning Series – Surveying.

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