Surveying MCQs Set-4

Page 1 of 4

1. The length of a chain is measured from

centre of one handle to centre of other handle

outside of one handle to outside of other handle

outside of one handle to inside of other handle

inside of one handle to inside of other handle

2. A building is an obstacle to

neither chaining nor ranging

chaining but not ranging

both chaining and ranging

ranging but not chaining

3. The rise and fall 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

is less accurate than height of instrument method

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

true R.L

more than true R.L

less than true R.L

none of these

5. The maximum tolerance in a 20m chain is

±5mm

±3mm

±2mm

±8mm

6. Three point problem can be solved by

Bessels method

Lehman's method

all of these

Tracing paper method

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

steel tape

line ranger

cross staff

optical square

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

335°

205°

295°

S 25° E

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

none of these

more accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

less accurate than rise and fall method

10. The allowable length of an offset depends upon the

degree of accuracy required

method of setting out the perpendiculars and nature of ground

scale of plotting

all of these

Page 2 of 4

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

none of these

hillock

depression

plain surface

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

two

four

one

three

13. The correction for sag is

always additive

always subtractive

sometimes additive and sometimes subtractive

always zero

14. Local attraction in compass surveying may exist due to

loss of magnetism of the needle

presence of magnetic substances near the instrument

friction of the needle at the pivot

incorrect levelling of the magnetic needle

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

none of these

remains unaffected

decreases

increases

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

90°

30°

45°

60°

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

eastern side of the true meridian

western side of the true meridian

none of these

southern side of the true meridian

18. A series of closely spaced contour lines represents a

gentle slope

plane surface

steep slope

uniform slope

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

straightening the links

removing one or more small circular rings

closing the joints of the rings if opened out

all of these

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

azimuth

magnetic bearing

local attraction

declination

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

tacheometric method

direct method

cross-sections method

square method

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

trigonometrical levelling

plane table surveying

theodolite surveying

tacheometry

23. 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

24. 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°

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

5m

2m

10m

20m

26. Theodolite is an instrument used for

measurement of vertical angles only

measurement of both horizontal and vertical angles

tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

27. Contour interval is

directly proportional to the flatness of ground

larger for accurate works

inversely proportional to the scale of the map

larger if the time available is more

28. 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 WCB of a line

both give QB of a line

both give QB of a line and WCB of a line

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

backsight only

foresight and backsight

foresight only

foresight and intermediate sight

30. 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

Page 4 of 4

31. Agate cap is fitted with a

chain

prismatic compass

level

cross staff

32. 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°

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

is lighter than chain

is easier to handle

can be easily repaired in the field

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

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

none of these

river

building

hillock

35. Benchmark is established by

hypsometry

trigonometrical levelling

spirit levelling

barometric levelling

36. 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

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

increasing the viscosity of liquid

decreasing the length of bubble

decreasing the radius of curvature of tube

increasing the diameter of the tube

38. Contour interval is

the vertical distance between two consecutive contours

the vertical distance between two points on same contour

the horizontal distance between two consecutive contours

the horizontal distance between two points on same contour

39. Cross staff is an instrument used for

none of these

setting out right angles

measuring bearings of the lines

measuring approximate horizontal angles

40. 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

Surveying MCQs Set-4

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