Surveying Questions (S4)

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

1. Arrange the following field works in a working order.

   
   

   1. Marking and fixing survey stations
   2. Reconnaissance
   3. Running survey lines

   
   

   1. (i) (ii) (iii)
   2. (ii) (i) (iii)
   3. (iii) (i) (ii)
   4. (iii) (ii) (i)

   View Answer

   Answer: b



2. Which of the following instruments is used to set out both $45^\circ$ and $90^\circ$ angles?

   
   

   1. Open Cross Staff
   2. French Cross Staff
   3. Optical Square
   4. Prism Square

   View Answer

   Answer: b
   Open cross-staff, Optical square and Prism square can be used to set only $45^\circ$ angle.



3. Which of the following obstacle to chaining but not ranging?

   
   

   1. A building
   2. A river
   3. A pond
   4. Both (b) and (c)

   View Answer

   Answer: d
   A building is an obstacle to both chaining and ranging.



4. What the following symbol represents?

   
   
   
   
   
   
   
   
   
   
   
   
   

   1. Sand Pit
   2. Rocks
   3. Pond
   4. None of the above

   View Answer

   Answer: a



5. If the reduced bearing of a line is $N 32^\circ W$, what will be its whole circle bearing?

   
   

   1. $32^\circ$
   2. $212^\circ$
   3. $328^\circ$
   4. $N328^\circ W$

   View Answer

   Answer: c
   Since the Quadrant is NW, WCB = 360 - RB = 360 - 32 = 328



6. What is the difference between the Fore bearing and Back bearing?

   
   

   1. $360^\circ$
   2. $180^\circ$
   3. $90^\circ$
   4. $45^\circ$

   View Answer

   Answer: b
   The fore bearing and back bearing differ exactly by $180^\circ$



7. If the fore bearing of a Line AB is $197^\circ$, What will be the back bearing of BA?

   
   

   1. $17^\circ$
   2. $180^\circ$
   3. $197^\circ$
   4. Can not be determined

   View Answer

   Answer: c
   If we go from A to B then the fore bearing of line AB is $197^\circ$, but if we go from B to A then the fore bearing of BA will be $17^\circ$ and since the difference between FB and BB is always $180^\circ$, the BB of BA will be $197^\circ$
   

   



8. What will be the internal angle ABC, if the fore bearing of AB is $21^\circ$ and that of BC is $109^\circ$?

   
   

   1. $111^\circ$
   2. $130^\circ$
   3. $87^\circ$
   4. $92^\circ$

   View Answer

   Answer: d



9. What will be the back bearing of $S 68^\circ 2' W$?

   
   

   1. $N 68^\circ 2' E$
   2. $68^\circ 2'$
   3. $248^\circ 2'$
   4. $S 68^\circ 2' E$

   View Answer

   Answer: a



10. What is the sum of the internal angles of a polygon of 'n' sides?

    
    

    1. $(n-4)90^\circ$
    2. $(2n-4)90^\circ$
    3. $(n+4)90^\circ$
    4. $(2n+4)90^\circ$

    View Answer

    Answer: b



11. Select the incorrect statement.

    
    

    1. The needle used in a compass should be straight and symmetrical.
    2. The needle should be sensitive
    3. The CG of the needle should be as near the pivot as possible
    4. The needle is the only magnetic material in a compass

    View Answer

    Answer: c
    For stability, the CG of the needle should be as far below the pivot as possible.



12. The angle which magnetic lines of force make with the surface of the earth is called ___.

    
    

    1. Dip
    2. Magnetic Declination
    3. Magnetic Bearing
    4. None of the above

    View Answer

    Answer: a



13. What is the angle of Dip at the Equator?

    
    

    1. $180^\circ$
    2. $90^\circ$
    3. Zero
    4. Always varies

    View Answer

    Answer: c
    It is $90^\circ$ at the magnetic poles



14. Which of the following compass has "Edge bar" type needle?

    
    

    1. Prismatic Compass
    2. Surveyor's Compass
    3. Wild B3 Precision Compass
    4. All of the above

    View Answer

    Answer: b

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