Surveying MCQs Set-4

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

three

one

two

four

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

foresight only

foresight and intermediate sight

backsight only

foresight and backsight

3. Normal tension is that pull which

is used at the time of standardising the tape

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

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

hillock

building

none of these

river

5. The length of a chain is measured from

outside of one handle to outside of other handle

outside of one handle to inside of other handle

centre of one handle to centre of other handle

inside of one handle to inside of other handle

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

none of these

hillock

plain surface

depression

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

205°

S 25° E

335°

295°

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

cross staff

line ranger

steel tape

optical square

9. In the prismatic compass

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

the magnetic needle moves with the box

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

the line of the sight does not move with the box

10. 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

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

tacheometric method

direct method

square method

cross-sections method

12. Agate cap is fitted with a

level

prismatic compass

cross staff

chain

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

quicker and less tedious for large number of intermediate sights

less accurate than rise and fall method

more accurate than rise and fall method

none of these

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

is lighter than chain

15. 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°

50°

20°

230°

16. Dumpy level is most suitable when

all of these

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

the instrument is to be shifted frequently

fly levelling is being done over long distance

17. Contour interval is

the vertical distance between two points on same contour

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

the horizontal distance between two consecutive contours

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

western side of the true meridian

eastern side of the true meridian

none of these

southern side of the true meridian

19. Three point problem can be solved by

all of these

Lehman's method

Tracing paper method

Bessels method

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

30°

45°

90°

60°

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21. The rise and fall method

is less accurate than height of instrument 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

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

none of these

more than true R.L

less than true R.L

true R.L

23. Benchmark is established by

barometric levelling

hypsometry

spirit levelling

trigonometrical levelling

24. Cross staff is an instrument used for

setting out right angles

none of these

measuring approximate horizontal angles

measuring bearings of the lines

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

all of these

closing the joints of the rings if opened out

straightening the links

removing one or more small circular rings

26. Subtense bar is an instrument used for

levelling

measurement of horizontal distances in undulated areas

measurement of angles

measurement of horizontal distances in plane areas

27. The allowable length of an offset depends upon the

scale of plotting

method of setting out the perpendiculars and nature of ground

all of these

degree of accuracy required

28. A series of closely spaced contour lines represents a

plane surface

gentle slope

uniform slope

steep slope

29. A building is an obstacle to

both chaining and ranging

ranging but not chaining

chaining but not ranging

neither chaining nor ranging

30. Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument

loss of magnetism of the needle

incorrect levelling of the magnetic needle

friction of the needle at the pivot

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31. The correction for sag is

always zero

always additive

sometimes additive and sometimes subtractive

always subtractive

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

increasing the viscosity of liquid

decreasing the radius of curvature of tube

increasing the diameter of the tube

decreasing the length of bubble

33. Theodolite is an instrument used for

measurement of both horizontal and vertical angles

measurement of horizontal angles only

tightening the capstan-headed nuts of level tube

measurement of vertical angles only

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

remains unaffected

decreases

none of these

increases

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

magnetic bearing

local attraction

declination

azimuth

36. The prismatic compass and surveyor's compass

both give QB of a line and WCB of a line

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

37. The maximum tolerance in a 20m chain is

±8mm

±3mm

±5mm

±2mm

38. For a line AB

both are correct

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

none of them is correct

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

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

theodolite surveying

tacheometry

trigonometrical levelling

plane table surveying

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

2m

10m

20m

5m

Surveying MCQs Set-4

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