Surveying MCQs Set-4

Page 1 of 4

1. 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

2. For a line AB

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°

none of them is correct

both are correct

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

30°

45°

60°

90°

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

straightening the links

all of these

closing the joints of the rings if opened out

removing one or more small circular rings

5. The maximum tolerance in a 20m chain is

±3mm

±5mm

±8mm

±2mm

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

theodolite surveying

plane table surveying

trigonometrical levelling

tacheometry

7. Agate cap is fitted with a

chain

prismatic compass

level

cross staff

8. A building is an obstacle to

ranging but not chaining

both chaining and ranging

neither chaining nor ranging

chaining but not ranging

9. 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°

10. Contour interval is

the vertical distance between two consecutive contours

the horizontal distance between two consecutive contours

the horizontal distance between two points on same contour

the vertical distance between two points on same contour

Page 2 of 4

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

depression

plain surface

none of these

hillock

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

one

three

four

two

13. 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 lighter than chain

is easier to handle

can be easily repaired in the field

14. In the prismatic compass

the line of the sight does 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

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

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

295°

335°

S 25° E

205°

16. Subtense bar is an instrument used for

levelling

measurement of horizontal distances in plane areas

measurement of horizontal distances in undulated areas

measurement of angles

17. Three point problem can be solved by

Tracing paper method

Lehman's method

all of these

Bessels method

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

backsight only

foresight only

foresight and intermediate sight

foresight and backsight

19. A series of closely spaced contour lines represents a

uniform slope

gentle slope

plane surface

steep slope

20. The allowable length of an offset depends upon the

degree of accuracy required

scale of plotting

all of these

method of setting out the perpendiculars and nature of ground

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21. Cross staff is an instrument used for

measuring approximate horizontal angles

none of these

setting out right angles

measuring bearings of the lines

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

decreases

none of these

remains unaffected

increases

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

eastern side of the true meridian

none of these

western side of the true meridian

southern side of the true meridian

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

decreasing the length of bubble

increasing the diameter of the tube

increasing the viscosity of liquid

decreasing the radius of curvature of tube

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

quicker and less tedious for large number of intermediate sights

less accurate than rise and fall method

none of these

more accurate than rise and fall method

26. The correction for sag is

sometimes additive and sometimes subtractive

always zero

always subtractive

always additive

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

building

none of these

river

hillock

28. 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

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

square method

direct method

cross-sections method

tacheometric method

30. Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

loss of magnetism of the needle

friction of the needle at the pivot

presence of magnetic substances near the instrument

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31. The prismatic compass and surveyor's compass

both give 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 QB of a line and WCB of a line

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

steel tape

cross staff

optical square

line ranger

33. The length of a chain is measured from

outside of one handle to outside of other handle

inside of one handle to inside of other handle

centre of one handle to centre of other handle

outside of one handle to inside of other handle

34. Benchmark is established by

barometric levelling

trigonometrical levelling

spirit levelling

hypsometry

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

2m

10m

5m

20m

36. 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

37. Normal tension is that pull which

makes the correction due to sag 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 pull equal to zero

38. The rise and fall method

is not suitable for levelling with tilting levels

is less accurate than height of instrument method

provides a check on the reduction of intermediate point levels

quicker and less tedious for large number of intermediate sights

39. Contour interval is

directly proportional to the flatness of ground

inversely proportional to the scale of the map

larger if the time available is more

larger for accurate works

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

declination

local attraction

magnetic bearing

azimuth

Surveying MCQs Set-4

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