Surveying Questions (S2)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.



  1. Which of the following is an instrumental error?


    1. Error due to magnetic declination
    2. Error due to inaccurate reading of the instrument
    3. An error caused due to wind
    4. none of the above

    View Answer
    Answer: d
    The instrumental error arises due to imperfect or faulty adjustment of the instrument.
    Option (a) & (c) = Natural Error
    Option (b) = Personal Error.

  2. In a 30 m chain, tallies are provided at every _____.


    1. 2 m
    2. 5 m
    3. 6 m
    4. 3 m

    View Answer
    Answer: b
    In 20 m and 30 m chains, tallies are provided at every 5 m.

  3. How many links are there in a 30 m chain?


    1. 80
    2. 100
    3. 150
    4. 200

    View Answer
    Answer: c

  4. What is the exact length of a Link?


    1. 161 mm
    2. 171 mm
    3. 180 mm
    4. 200 mm

    View Answer
    Answer: a
    As per IS: 1492, Exact length of a Link is 161±1 mm.

  5. What is the length of Gunter's Chain?


    1. 20 ft
    2. 33 ft
    3. 66 ft
    4. 100 ft

    View Answer
    Answer: c
    A Gunter's Chain is 66 ft long and consists of 100 links

  6. What is the difference between the length of Engineer's Chain and Revenue Chain?


    1. 33 ft
    2. 66 ft
    3. 25 ft
    4. 50 ft

    View Answer
    Answer: b
    Length of Engineer's chain = 100 ft; Length of Revenue chain = 33 ft.

  7. Tolerance limit on length for 10 m and 30 m are respectively ...


    1. ±3 mm and ±5 mm
    2. ±5 mm and ±8 mm
    3. ±8 mm and ±5 mm
    4. ±3 mm and ±8 mm

    View Answer
    Answer: d
    As per IS: 1492, Tolerance Limit for 5 m and 10 m chains are ±3 mm, for 20 m chain ±5 mm and for 30 m chain ±8 mm.

  8. Inver Tape is made of an alloy of ...


    1. Nickel and Steel
    2. Copper and Zinc
    3. Copper and Tin
    4. Nickel and Chromium

    View Answer
    Answer: a
    Inver tape is made of an alloy of Nickel (36 %) and Steel.

  9. When very high precision is required, which of the following tape is used?


    1. Metallic Tape
    2. Steel Tape
    3. Inver Tape
    4. Linen Tape

    View Answer
    Answer: c

  10. What is the length of the colour bands in a ranging rod?


    1. 100 mm
    2. 200 mm
    3. 300 mm
    4. 500 mm

    View Answer
    Answer: b

  11. Select the incorrect statement.


    1. Direct ranging is done when the two ends of the chain line are intervisible.
    2. Indirect ranging is done when the two ends of the chain line are not intervisible
    3. A line ranger consists of either two plane mirrors or one right-angled isosceles prism
    4. Indirect ranging is done by selecting two intermediate points

    View Answer
    Answer: c
    A line ranger consists of either two plane mirrors or TWO right-angled isosceles prisms.

  12. After chaining, if the leader has 4 arrows and the follower has 3, then the length of the chain line is?


    1. 7 chains
    2. 1 chain
    3. 3 chains
    4. 4 chains

    View Answer
    Answer: c

  13. Error due to the incorrect counting of tape length is termed as ...


    1. Systematic error
    2. Mistake
    3. Compensating error
    4. Blunder

    View Answer
    Answer: d

  14. Error due to sag is ...


    1. Positive
    2. Negative
    3. Cumulative
    4. Both (a) and (c)
    5. Both (b) and (c)

    View Answer
    Answer: d
    When the chain is stretched above the ground due to undulations or irregular ground, the chain sags and takes the form of a catenary. The measured distance, therefore, is more than the actual distance and hence the error is positive and cumulative.

  15. Abney Clinometer is used to ...


    1. measure vertical angle
    2. measure slope of the ground
    3. trace grade contour
    4. All of the above

    View Answer
    Answer: d





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