Surveying MCQs Set-4

Page 1 of 4

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

60°

90°

30°

45°

2. Three point problem can be solved by

Bessels method

Lehman's method

all of these

Tracing paper method

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

foresight and backsight

foresight and intermediate sight

backsight only

foresight only

4. For a line AB

both are correct

none of them is 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°

5. Local attraction in compass surveying may exist due to

friction of the needle at the pivot

presence of magnetic substances near the instrument

loss of magnetism of the needle

incorrect levelling of the magnetic needle

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

increases

decreases

remains unaffected

none of these

7. 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

8. The maximum tolerance in a 20m chain is

±3mm

±2mm

±8mm

±5mm

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

205°

S 25° E

295°

335°

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

three

four

two

one

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11. 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

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

none of these

river

hillock

building

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

can be easily repaired in the field

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

is easier to handle

is lighter than chain

14. Benchmark is established by

spirit levelling

hypsometry

trigonometrical levelling

barometric levelling

15. A building is an obstacle to

chaining but not ranging

ranging but not chaining

both chaining and ranging

neither chaining nor ranging

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

cross staff

steel tape

line ranger

optical square

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

theodolite surveying

trigonometrical levelling

plane table surveying

tacheometry

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

magnetic bearing

declination

azimuth

local attraction

19. The prismatic compass and surveyor's compass

both give QB of a line

both give WCB of a line

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

both give QB of a line and WCB of a line

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

less accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

none of these

more accurate than rise and fall method

Page 3 of 4

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

all of these

straightening the links

closing the joints of the rings if opened out

removing one or more small circular rings

22. Normal tension is that pull which

makes the correction due to sag equal to zero

is used at the time of standardising the tape

makes the correction due to pull equal to zero

neutralizes the effect due to pull and sag

23. Dumpy level is most suitable when

all of these

fly levelling is being done over long distance

the instrument is to be shifted frequently

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

24. A series of closely spaced contour lines represents a

gentle slope

uniform slope

steep slope

plane surface

25. Subtense bar is an instrument used for

levelling

measurement of horizontal distances in plane areas

measurement of angles

measurement of horizontal distances in undulated areas

26. 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

50°

20°

160°

230°

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

cross-sections method

tacheometric method

direct method

square method

28. Agate cap is fitted with a

prismatic compass

cross staff

level

chain

29. Cross staff is an instrument used for

measuring approximate horizontal angles

measuring bearings of the lines

setting out right angles

none of these

30. 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

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31. In the prismatic compass

the line of the sight does not move with the box

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

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

the magnetic needle moves with the box

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

20m

10m

2m

5m

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

eastern side of the true meridian

southern side of the true meridian

none of these

western side of the true meridian

34. Theodolite is an instrument used for

measurement of vertical angles only

measurement of horizontal angles only

measurement of both horizontal and vertical angles

tightening the capstan-headed nuts of level tube

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

decreasing the radius of curvature of tube

increasing the viscosity of liquid

increasing the diameter of the tube

decreasing the length of bubble

36. The rise and fall method

is less accurate than height of instrument method

quicker and less tedious for large number of intermediate sights

provides a check on the reduction of intermediate point levels

is not suitable for levelling with tilting levels

37. The length of a chain is measured from

inside of one handle to inside of other handle

centre of one handle to centre of other handle

outside of one handle to inside of other handle

outside of one handle to outside of other handle

38. The correction for sag is

always subtractive

always additive

sometimes additive and sometimes subtractive

always zero

39. The allowable length of an offset depends upon the

method of setting out the perpendiculars and nature of ground

degree of accuracy required

all of these

scale of plotting

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

hillock

plain surface

none of these

depression

Surveying MCQs Set-4

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