This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “Errors in Compass Traversing”.
1. Which of the following is not among the classification of errors in compass surveying?
a) Instrumental errors
b) Personal errors
c) Errors due to the natural cause
d) Surveyor errors
View Answer
Explanation: The errors may be classified as instrumental errors, personal errors, errors due to natural causes. Surveyor errors may come under personal errors.
2. Which of the following is not under instrumental errors?
a) Sluggish needle
b) Blunt pivot joint
c) Inaccurate centring
d) Plane of sight not being vertical
View Answer
Explanation: Instrumental errors are those which arise due to the faulty adjustment of the instruments. They may be due to the following reasons the needle not being perfectly straight, sluggish needle etc.
3. Line of sight not passing through the centres of the right comes under personal errors.
a) True
b) False
View Answer
Explanation: Line of sight not passing through the centres of the right comes under instrumental errors. Instrumental errors are those which arise due to the faulty adjustment of the instruments.
4. Which of the following error comes under personal errors?
a) The needle not being perfectly straight
b) Pivot being bent
c) Plane of sight not being vertical
d) Inaccurate bisection of signals
View Answer
Explanation: Instrumental errors are those which arise due to the faulty adjustment of the instrument e.g the needle not being perfectly straight, sluggish needle etc. Inaccurate centring, Inaccurate levelling of compass box, Inaccurate bisection of signals etc comes under personal errors.
5. Inaccurate levelling of the compass box is a personal error in compass surveying.
a) True
b) False
View Answer
Explanation: Inaccurate centring, Inaccurate levelling of compass box, Inaccurate bisection of signals etc comes under personal errors. Careless in reading and recording also.
6. Local attraction due to the proximity of local attraction forces comes under instrumental errors.
a) True
b) False
View Answer
Explanation: Local attraction due to the proximity of local attraction forces comes under natural errors. Variation in declination, magnetic changes in the atmosphere due to clouds and Strom’s etc also comes under natural errors in compass surveying.
7. Which of the following is not a natural error in compass surveying?
a) Variation in declination
b) Magnetic changes in the atmosphere due to clouds and Strom’s
c) Local attraction due to the proximity of local attraction forces
d) Pivot being bent
View Answer
Explanation: Instrumental errors are those which arise due to the faulty adjustment of the instrument e.g pivot being bent, blunt pivot point etc. Variation in declination, magnetic changes in the atmosphere due to clouds and Strom’s etc also comes under natural errors in compass surveying.
8. Variation in declination is a natural error in compass surveying.
a) True
b) False
View Answer
Explanation: Natural errors are those which are not in over hands or control to adjust. Variation in declination, magnetic changes in the atmosphere due to clouds and Strom’s etc also comes under natural errors in compass surveying.
9. Improper balancing weight comes under instrumental errors in compass surveying.
a) True
b) False
View Answer
Explanation: Instrumental errors are those which arise due to the faulty adjustment of the instrument e.g pivot being bent, blunt pivot point etc.
10. Irregular variation due to magnetic storms is a _______ error.
a) Instrumental errors
b) Personal errors
c) Errors due to the natural cause
d) Surveyor errors
View Answer
Explanation: Natural errors are those which are not in over hands or control to adjust. Variation in declination, magnetic changes in the atmosphere due to clouds and Strom’s etc are some of the examples of natural causes.
Sanfoundry Global Education & Learning Series – Surveying.
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