Surveying MCQs Set-4

Page 1 of 4

1. A series of closely spaced contour lines represents a

uniform slope

gentle slope

plane surface

steep slope

2. 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

3. A building is an obstacle to

neither chaining nor ranging

both chaining and ranging

ranging but not chaining

chaining but not ranging

4. Dumpy level is most suitable when

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

the instrument is to be shifted frequently

fly levelling is being done over long distance

all of these

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

theodolite surveying

plane table surveying

trigonometrical levelling

tacheometry

6. Normal tension is that pull which

makes the correction due to pull equal to zero

is used at the time of standardising the tape

neutralizes the effect due to pull and sag

makes the correction due to sag equal to zero

7. 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

all of these

closing the joints of the rings if opened out

straightening the links

8. Agate cap is fitted with a

level

chain

prismatic compass

cross staff

9. The rise and fall method

provides a check on the reduction of intermediate point levels

quicker and less tedious for large number of intermediate sights

is not suitable for levelling with tilting levels

is less accurate than height of instrument method

10. For a line AB

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

both are correct

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

none of them is correct

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

plain surface

depression

none of these

hillock

12. Theodolite is an instrument used for

measurement of vertical angles only

measurement of both horizontal and vertical angles

measurement of horizontal angles only

tightening the capstan-headed nuts of level tube

13. The prismatic compass and surveyor's compass

both give QB of a line and WCB 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

14. Contour interval is

directly proportional to the flatness of ground

larger if the time available is more

inversely proportional to the scale of the map

larger for accurate works

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

building

river

hillock

none of these

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

20m

5m

10m

2m

17. 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

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

decreasing the radius of curvature of tube

decreasing the length of bubble

increasing the viscosity of liquid

increasing the diameter of the tube

19. Contour interval is

the horizontal distance between two consecutive contours

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

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

more accurate than rise and fall method

less accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

none of these

Page 3 of 4

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

45°

90°

30°

60°

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

local attraction

declination

azimuth

magnetic bearing

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 practically inextensible and is not liable to kinks when in use

is lighter than chain

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

decreases

increases

none of these

remains unaffected

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

cross-sections method

square method

tacheometric method

direct method

26. 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

27. The maximum tolerance in a 20m chain is

±8mm

±5mm

±3mm

±2mm

28. The correction for sag is

always subtractive

sometimes additive and sometimes subtractive

always zero

always additive

29. Subtense bar is an instrument used for

measurement of horizontal distances in plane areas

measurement of angles

levelling

measurement of horizontal distances in undulated areas

30. In the prismatic compass

the line of the sight does not move with the box

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

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31. The length of a chain is measured from

outside of one handle to outside of other handle

outside of one handle to inside of other handle

centre of one handle to centre of other handle

inside of one handle to inside of other handle

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

four

two

three

one

33. Three point problem can be solved by

Lehman's method

all of these

Tracing paper method

Bessels method

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

optical square

steel tape

cross staff

line ranger

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

S 25° E

335°

295°

205°

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

foresight and backsight

foresight only

backsight only

foresight and intermediate sight

37. Benchmark is established by

trigonometrical levelling

barometric levelling

spirit levelling

hypsometry

38. 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°

230°

160°

20°

39. Cross staff is an instrument used for

measuring bearings of the lines

none of these

setting out right angles

measuring approximate horizontal angles

40. 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

Surveying MCQs Set-4

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