Surveying Multiple Choice Questions on “Theodolite Traversing – Errors”.
1. Which of the following errors can be eliminated by a method of repetition?
i) errors due to eccentricity.
ii) errors due to in adjustments of line of collimation.
iii) error due to inaccurate graduations.
iv) error due to inaccurate bisection of the object.
a) i only
b) i and ii
c) i, ii and 3
d) i, ii, iii and iv
Answer: d
Clarification: By a method of repetition the following errors can be eliminated. They are errors due to eccentricity, errors due to in adjustments of line of collimation, error due to inaccurate graduations, error due to inaccurate bisection of the object etc.
2. Sources of errors in transit work are broadly classified into ______ types.
a) 2
b) 3
c) 4
d) 5
Answer: b
Clarification: Sources of error in theodolite work are 3 types. They are instrumental, personal and natural.
3. Error due to imperfect adjustment of plate levels comes under ________ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: c
Clarification: Instrumental errors are due to the imperfect adjustment of an instrument, structural defects in the instrument and imperfections due to wear.
4. Error due to structural defects in the instrument comes under ________ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: c
Clarification: Instrumental errors are due to imperfect adjustment of an instrument, structural defects in the instrument and imperfections due to wear.
5. Error due to imperfections due to wear comes under ________ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: c
Clarification: Instrumental errors are due to imperfect adjustment of an instrument, structural defects in the instrument and imperfections due to wear.
6. Error due to the line of collimation not being perpendicular to the horizontal axis comes under ________ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: c
Clarification: Instrumental errors are due to imperfect adjustment of an instrument, structural defects in the instrument and imperfections due to wear. Error due to the line of collimation not being perpendicular to the horizontal axis also comes under instrumental error.
7. Error due to in accurate centering comes under ________ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: a
Clarification: The personal errors may be due to errors in manipulation, errors in sighting and reading. Inaccurate centering comes under errors in manipulation.
8. Inaccurate levelling comes under ______ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: a
Clarification: The personal errors may be due to errors in manipulation, errors in sighting and reading. Inaccurate levelling comes under errors in manipulation.
9. Slip comes under _____ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: a
Clarification: The personal errors may be due to errors in manipulation, errors in sighting and reading. Slip comes under errors in manipulation.
10. Manipulating wrong tangent screw comes under _____ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: a
Clarification: The personal errors may be due to errors in manipulation, errors in sighting and reading. Manipulating wrong tangent screw comes under errors in manipulation.
11. Parallax comes under _____ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: a
Clarification: The personal errors may be due to errors in manipulation, errors in sighting and reading. Parallax comes under errors due to sighting and reading.
12. Inaccurate bisection of points observed comes under _____ error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: a
Clarification: The personal errors may be due to errors in manipulation, errors in sighting and reading. Inaccurate bisection of points observed comes under errors due to sighting and reading.
13. Un equal atmospheric refraction due to high temperature comes under which sources of errors?
a) Personal
b) Natural
c) Instrumental
d) Personal and natural
Answer: b
Clarification: Un equal atmospheric refraction due to high temperature comes under natural errors. Unequal settlement of tripod, wind vibrations etc., also comes under the same category.
14. Unequal settlement of tripod comes under ____ source of error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: b
Clarification: Un equal atmospheric refraction due to high temperature comes under natural errors. Unequal settlement of tripod, wind vibrations etc., also comes under the same category.
15. Unequal expansion of parts of telescope comes under _____ source of error.
a) personal
b) natural
c) instrumental
d) personal and natural
Answer: b
Clarification: Un equal atmospheric refraction due to high temperature comes under natural errors. Unequal expansion of parts of telescope also comes under a natural source of error.