Surveying MCQs Set-4

Page 1 of 4

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

southern side of the true meridian

eastern side of the true meridian

none of these

western side of the true meridian

2. 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°

160°

20°

230°

3. The rise and fall 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

is less accurate than height of instrument method

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

closing the joints of the rings if opened out

removing one or more small circular rings

straightening the links

all of these

5. Contour interval is

larger for accurate works

directly proportional to the flatness of ground

inversely proportional to the scale of the map

larger if the time available is more

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

is lighter than chain

can be easily repaired in the field

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

is easier to handle

7. Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument

friction of the needle at the pivot

incorrect levelling of the magnetic needle

loss of magnetism of the needle

8. Three point problem can be solved by

Bessels method

all of these

Lehman's method

Tracing paper method

9. Subtense bar is an instrument used for

measurement of horizontal distances in plane areas

levelling

measurement of angles

measurement of horizontal distances in undulated areas

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

5m

2m

20m

10m

Page 2 of 4

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

trigonometrical levelling

tacheometry

plane table surveying

theodolite surveying

12. Cross staff is an instrument used for

measuring approximate horizontal angles

measuring bearings of the lines

setting out right angles

none of these

13. The length of a chain is measured from

outside of one handle to inside of other handle

outside of one handle to outside of other handle

centre of one handle to centre of other handle

inside of one handle to inside of other handle

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

increasing the diameter of the tube

decreasing the length of bubble

decreasing the radius of curvature of tube

increasing the viscosity of liquid

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

local attraction

declination

magnetic bearing

azimuth

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

depression

plain surface

none of these

hillock

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

none of these

decreases

increases

remains unaffected

18. 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

19. Dumpy level is most suitable when

all of these

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

fly levelling is being done over long distance

the instrument is to be shifted frequently

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

foresight and intermediate sight

foresight and backsight

backsight only

foresight only

Page 3 of 4

21. A series of closely spaced contour lines represents a

gentle slope

plane surface

uniform slope

steep slope

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

direct method

tacheometric method

square method

cross-sections method

23. Benchmark is established by

trigonometrical levelling

spirit levelling

barometric levelling

hypsometry

24. The maximum tolerance in a 20m chain is

±3mm

±5mm

±8mm

±2mm

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

none of these

building

river

hillock

26. The correction for sag is

always additive

sometimes additive and sometimes subtractive

always zero

always subtractive

27. 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°

28. The prismatic compass and surveyor's compass

both give QB of a line

both give QB of a line and WCB 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

29. Agate cap is fitted with a

chain

cross staff

level

prismatic compass

30. 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

Page 4 of 4

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

60°

45°

90°

30°

32. 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

true R.L

none of these

more than true R.L

33. 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 moves with the box

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

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

quicker and less tedious for large number of intermediate sights

none of these

more accurate than rise and fall method

less accurate than rise and fall method

35. Normal tension is that pull which

is used at the time of standardising the tape

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

36. Contour interval is

the vertical distance between two points on same contour

the horizontal distance between two consecutive contours

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

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

three

two

four

one

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

steel tape

optical square

line ranger

cross staff

39. A building is an obstacle to

ranging but not chaining

chaining but not ranging

both chaining and ranging

neither chaining nor ranging

40. The allowable length of an offset depends upon the

degree of accuracy required

method of setting out the perpendiculars and nature of ground

all of these

scale of plotting

Surveying MCQs Set-4

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