Surveying MCQs Set-4

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1. Which of the following methods of contouring is most suitable for a hilly terrain?

cross-sections method

direct method

square method

tacheometric method

2. The type of surveying which requires least office work is

tacheometry

plane table surveying

trigonometrical levelling

theodolite surveying

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

none of these

river

hillock

building

4. If the fore bearing of a line AB is 35° and that of line BC is 15, then the included angle between the lines is

160°

20°

230°

50°

5. Dumpy level is most suitable when

fly levelling is being done over long distance

many readings are to be taken from a single setting of the instrument

all of these

the instrument is to be shifted frequently

6. The following sights are taken on a "turning point"

foresight only

backsight only

foresight and backsight

foresight and intermediate sight

7. For a line AB

both are correct

the fore bearing of AB and back bearing of AB differ by 180°

the fore bearing of AB and back bearing of BA differ by 180°

none of them is correct

8. With the rise of temperature, the sensitivity of a bubble tube

remains unaffected

increases

decreases

none of these

9. Three point problem can be solved by

all of these

Tracing paper method

Bessels method

Lehman's method

10. The prismatic compass and surveyor's compass

both give QB of a line

give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively

both give WCB of a line

both give QB of a line and WCB of a line

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11. The suitable contour interval for a map with scale 1: 10000 is

5m

10m

2m

20m

12. Subtense bar is an instrument used for

measurement of horizontal distances in undulated areas

measurement of horizontal distances in plane areas

levelling

measurement of angles

13. The length of a chain is measured from

centre of one handle to centre of other handle

outside of one handle to inside of other handle

inside of one handle to inside of other handle

outside of one handle to outside of other handle

14. The correction for sag is

always additive

sometimes additive and sometimes subtractive

always subtractive

always zero

15. The sensitivity of a bubble tube can be increased by

increasing the viscosity of liquid

decreasing the radius of curvature of tube

decreasing the length of bubble

increasing the diameter of the tube

16. Contour interval is

the vertical distance between two points on same contour

the horizontal distance between two consecutive contours

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

17. If the staff is not held vertical at a leveling station, the reduced level calculated from the observation would be

more than true R.L

none of these

less than true R.L

true R.L

18. Local attraction in compass surveying may exist due to

loss of magnetism of the needle

presence of magnetic substances near the instrument

incorrect levelling of the magnetic needle

friction of the needle at the pivot

19. Contour interval is

larger if the time available is more

larger for accurate works

inversely proportional to the scale of the map

directly proportional to the flatness of ground

20. If the quadrantal bearing of a line is N25°W, then the whole circle bearing of the line is

S 25° E

205°

295°

335°

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21. Benchmark is established by

spirit levelling

barometric levelling

hypsometry

trigonometrical levelling

22. Cross staff is an instrument used for

none of these

measuring bearings of the lines

measuring approximate horizontal angles

setting out right angles

23. Which of the following is not used in measuring perpendicular offsets?

cross staff

line ranger

steel tape

optical square

24. Closed contours, with higher value inwards, represents a

depression

plain surface

none of these

hillock

25. A negative declination shows that the magnetic meridian is to the

western side of the true meridian

southern side of the true meridian

eastern side of the true meridian

none of these

26. A building is an obstacle to

chaining but not ranging

ranging but not chaining

neither chaining nor ranging

both chaining and ranging

27. Normal tension is that pull which

makes the correction due to sag equal to zero

makes the correction due to pull equal to zero

neutralizes the effect due to pull and sag

is used at the time of standardising the tape

28. The horizontal angle between the true meridian and magnetic meridian at a place is called

magnetic bearing

azimuth

declination

local attraction

29. The allowable length of an offset depends upon the

all of these

scale of plotting

degree of accuracy required

method of setting out the perpendiculars and nature of ground

30. The angle of intersection of the two plane mirrors of an optical square is

60°

30°

90°

45°

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31. If the length of a chain is found to be short on testing, it can be adjusted by

closing the joints of the rings if opened out

all of these

straightening the links

removing one or more small circular rings

32. Theodolite is an instrument used for

measurement of horizontal angles only

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

measurement of vertical angles only

33. In the prismatic compass

the magnetic needle moves with the box

the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

the line of the sight does not move with the box

the magnetic needle and graduated circle do not move with the box

34. Height of instrument (H.I) method of levelling is

more accurate than rise and fall method

less accurate than rise and fall method

none of these

quicker and less tedious for large number of intermediate sights

35. For accurate work, the steel band should always be used in preference to chain because the steel band

is easier to handle

can be easily repaired in the field

is lighter than chain

is practically inextensible and is not liable to kinks when in use

36. The number of horizontal cross wires in a stadia diaphragm is

two

three

one

four

37. Agate cap is fitted with a

chain

cross staff

level

prismatic compass

38. The rise and fall method

quicker and less tedious for large number of intermediate sights

is not suitable for levelling with tilting levels

provides a check on the reduction of intermediate point levels

is less accurate than height of instrument method

39. A series of closely spaced contour lines represents a

plane surface

uniform slope

steep slope

gentle slope

40. The maximum tolerance in a 20m chain is

±2mm

±8mm

±3mm

±5mm

Surveying MCQs Set-4

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