Surveying MCQs Set-4

Page 1 of 4

1. Theodolite is an instrument used for

measurement of both horizontal and vertical angles

measurement of vertical angles only

tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

2. The rise and fall method

quicker and less tedious for large number of intermediate sights

is less accurate than height of instrument method

provides a check on the reduction of intermediate point levels

is not suitable for levelling with tilting levels

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

none of these

plain surface

depression

hillock

4. Cross staff is an instrument used for

none of these

measuring bearings of the lines

setting out right angles

measuring approximate horizontal angles

5. The maximum tolerance in a 20m chain is

±5mm

±2mm

±3mm

±8mm

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

none of these

decreases

increases

remains unaffected

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

foresight and intermediate sight

foresight only

backsight only

foresight and backsight

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

30°

60°

45°

90°

9. Dumpy level is most suitable when

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

fly levelling is being done over long distance

all of these

the instrument is to be shifted frequently

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

theodolite surveying

trigonometrical levelling

tacheometry

plane table surveying

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11. Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

presence of magnetic substances near the instrument

friction of the needle at the pivot

loss of magnetism of the needle

12. The correction for sag is

always zero

sometimes additive and sometimes subtractive

always subtractive

always additive

13. Agate cap is fitted with a

level

cross staff

chain

prismatic compass

14. A series of closely spaced contour lines represents a

plane surface

uniform slope

gentle slope

steep slope

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

295°

335°

205°

S 25° E

16. Benchmark is established by

barometric levelling

spirit levelling

hypsometry

trigonometrical levelling

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

none of these

less accurate than rise and fall method

more accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

18. The length of a chain is measured from

inside of one handle to inside of other handle

outside of one handle to inside of other handle

centre of one handle to centre of other handle

outside of one handle to outside of other handle

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

2m

10m

20m

5m

20. Subtense bar is an instrument used for

levelling

measurement of angles

measurement of horizontal distances in plane areas

measurement of horizontal distances in undulated areas

Page 3 of 4

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

increasing the diameter of the tube

decreasing the radius of curvature of tube

decreasing the length of bubble

increasing the viscosity of liquid

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

steel tape

optical square

line ranger

cross staff

23. 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

24. Normal tension is that pull which

neutralizes the effect due to pull and sag

makes the correction due to pull equal to zero

makes the correction due to sag equal to zero

is used at the time of standardising the tape

25. In the prismatic compass

the magnetic needle moves with the box

the magnetic needle and graduated circle do 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 line of the sight does not move with the box

26. For a line AB

both are correct

none of them is correct

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

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

27. A building is an obstacle to

ranging but not chaining

chaining but not ranging

both chaining and ranging

neither chaining nor ranging

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

tacheometric method

direct method

cross-sections method

square method

29. The allowable length of an offset depends upon the

method of setting out the perpendiculars and nature of ground

scale of plotting

all of these

degree of accuracy required

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

three

two

one

four

Page 4 of 4

31. Contour interval is

inversely proportional to the scale of the map

larger for accurate works

larger if the time available is more

directly proportional to the flatness of ground

32. Contour interval is

the horizontal distance between two consecutive contours

the vertical distance between two consecutive contours

the vertical distance between two points on same contour

the horizontal distance between two points on same contour

33. 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

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

less than true R.L

none of these

true R.L

more than true R.L

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

removing one or more small circular rings

closing the joints of the rings if opened out

all of these

straightening the links

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

river

hillock

building

none of these

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

declination

magnetic bearing

azimuth

local attraction

38. The prismatic compass and surveyor's compass

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

both give QB of a line

both give WCB of a line

39. Three point problem can be solved by

all of these

Tracing paper method

Lehman's method

Bessels method

40. 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°

Surveying MCQs Set-4

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