Surveying MCQs Set-4

Page 1 of 4

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

none of these

river

building

hillock

2. 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

3. The allowable length of an offset depends upon the

scale of plotting

degree of accuracy required

method of setting out the perpendiculars and nature of ground

all of these

4. Cross staff is an instrument used for

measuring approximate horizontal angles

none of these

setting out right angles

measuring bearings of the lines

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

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

is easier to handle

is lighter than chain

can be easily repaired in the field

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

none of these

eastern side of the true meridian

southern side of the true meridian

western side of the true meridian

7. 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

8. 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

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

square method

direct method

tacheometric method

cross-sections method

10. Benchmark is established by

barometric levelling

spirit levelling

hypsometry

trigonometrical levelling

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

line ranger

cross staff

steel tape

optical square

12. Contour interval is

larger for accurate works

larger if the time available is more

directly proportional to the flatness of ground

inversely proportional to the scale of the map

13. The rise and fall method

is less accurate than height of instrument method

is not suitable for levelling with tilting levels

quicker and less tedious for large number of intermediate sights

provides a check on the reduction of intermediate point levels

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

one

two

three

four

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

230°

50°

160°

20°

16. A series of closely spaced contour lines represents a

steep slope

uniform slope

plane surface

gentle slope

17. Subtense bar is an instrument used for

measurement of horizontal distances in plane areas

levelling

measurement of horizontal distances in undulated areas

measurement of angles

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

increases

none of these

decreases

remains unaffected

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

plane table surveying

tacheometry

trigonometrical levelling

theodolite surveying

20. Normal tension is that pull which

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

makes the correction due to sag equal to zero

Page 3 of 4

21. Theodolite is an instrument used for

tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

measurement of vertical angles only

measurement of both horizontal and vertical angles

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

205°

295°

S 25° E

335°

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

45°

60°

90°

30°

24. Agate cap is fitted with a

prismatic compass

level

chain

cross staff

25. 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

26. The maximum tolerance in a 20m chain is

±2mm

±3mm

±8mm

±5mm

27. 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

28. The correction for sag is

always additive

sometimes additive and sometimes subtractive

always zero

always subtractive

29. 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

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

local attraction

magnetic bearing

declination

azimuth

Page 4 of 4

31. 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°

32. Contour interval is

the horizontal distance between two points on same contour

the horizontal distance between two consecutive contours

the vertical distance between two consecutive contours

the vertical distance between two points on same contour

33. 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

outside of one handle to outside of other handle

inside of one handle to inside of other handle

34. In the prismatic compass

the line of the sight does not move with the box

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

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

35. 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

more than true R.L

none of these

true R.L

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

hillock

plain surface

none of these

depression

37. Three point problem can be solved by

Bessels method

all of these

Lehman's method

Tracing paper method

38. A building is an obstacle to

ranging but not chaining

neither chaining nor ranging

chaining but not ranging

both chaining and ranging

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

5m

2m

10m

20m

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

backsight only

foresight and intermediate sight

foresight only

foresight and backsight

Surveying MCQs Set-4

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