**On This Page**

This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on Surveying Set 3

Q1 | Which of the following errors can be neutralised by setting the level midwaybetween the two stations ?

- error due to curvature only
- error due to refraction only
- error due to both curvature and re-fraction
- none of the above

Q2 | Height of instrument method of levelling is

- more accurate than rise and fall method
- less accurate than rise and fall method
- quicker and less tedious for large number of intermediate sights
- none of the above

Q3 | The rise and fall method

- is less.accurate than height of instrument method
- is not suitable for levelling with tilting levels
- provides a check on the reduction of intermediate point levels
- quicker and less tedious for large number of intermediate sights

Q4 | If the staff is not held vertical at a level¬ling station, the reduced level calculatedfrom the observation would be

- true R.L.
- more than true R.L.
- less than true R.L.
- none of the above

Q5 | The difference between a level line and a horizontal line is that

- level line is a curved line while hori-zontal line is a straight line
- level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
- horizontal line is normal to plumb line while level line may not be normal to the plumb line
- both are same

Q6 | The sensitivity of a bubble tube can be increased by

- increasing the diameter of the tube
- decreasing the length of bubble
- increasing the viscosity of liquid
- decreasing the radius of curvature of tube

Q7 | With the rise of temperature, the sensitivity of a bubble tube

- decreases
- increases
- remains unaffected
- none of the above

Q8 | Refraction correction

- completely eliminates curvature correction
- partially eliminates curvature correction
- adds to the curvature correction
- has no effect on curvature correction

Q9 | The R.L, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is on the ceiling is 2.745 m, the R.L. of point B will be

- 94.80 m
- 99.71 m
- 100.29 m
- 105.20 m

Q10 | As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be

- 98.7
- 100
- 102.3
- 103.3

Q11 | If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to

- d
- 1/d
- d2
- 1/d2

Q12 | Sensitiveness of a level tube is designated by

- radius of level tube
- length of level tube
- length of bubble of level tube
- none of the above

Q13 | Which of the following statements is in-correct ?

- Error due to refraction may not be completely eliminated by reciprocal levelling.
- Tilting levels are commonly used for precision work.
- The last reading of levelling is always a foresight.
- All of the above statements are incorrect.

Q14 | Dumpy level is most suitable when

- the instrument is to be shifted frequently
- fly levelling is being done over long distance
- many readings are to be taken from a single setting of the instrument
- all of the above

Q15 | The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be

- equidistant from A and B
- closer to the higher station
- closer to the lower station
- as far as possible from the line AB

Q16 | Contour interval is

- inversely proportional to the scale of the map
- directly proportional to the flatness of ground
- larger for accurate works
- larger if the time available is more

Q17 | An imaginary line lying throughout the surface of ground and preserving aconstant inclination to the horizontal is known as

- contour line
- horizontal equivalent
- contour interval
- contour gradient

Q18 | The suitable contour interval for a map with scale 1 : 10000 is

- 2 m
- 5m
- 10 m
- 20 m

Q19 | Select the correct statement.

- A contour is not necessarily a closed curve.
- A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour.
- Two contours of different elevations do not cross each other except in case of an overhanging cliff.
- All of the above statements are correct.

Q20 | A series of closely spaced contour lines represents a

- steep slope
- gentle slope
- uniform slope
- plane surface

Q21 | Direct method of contouring is

- a quick method
- adopted for large surveys only
- most accurate method
- suitable for hilly terrains

Q22 | In direct method of contouring, the process of locating or identifying pointslying on a contour is called

- ranging
- centring
- horizontal control
- vertical control

Q23 | In the cross-section method of indirect contouring, the spacing of cross-sections depends uponi) contour intervalii) scale of planiii) characteristics of groundThe correct answer is

- only (i)
- (i)and(ii)
- (ii) and (iii)
- (i), (ii) and (iii)

Q24 | Which of the following methods of con-touring is most suitable for a hillyterrain ?

- direct method
- square method
- cross-sections method
- tacheometric method

Q25 | Select the correct statement.

- Contour interval on any map is kept constant.
- Direct method of contouring is cheaper than indirect method.
- Inter-visibility of points on a contour map cannot be ascertained.
- Slope of a hill cannot be determined with the help of contours.