Surveying MCQs Set-4

Page 1 of 4

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

building

none of these

river

hillock

2. 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

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

three

one

four

two

4. Agate cap is fitted with a

prismatic compass

chain

level

cross staff

5. The allowable length of an offset depends upon the

all of these

method of setting out the perpendiculars and nature of ground

degree of accuracy required

scale of plotting

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

western side of the true meridian

southern side of the true meridian

eastern side of the true meridian

none of these

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

backsight only

foresight only

foresight and intermediate sight

foresight and backsight

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

magnetic bearing

declination

local attraction

azimuth

9. Contour interval is

directly proportional to the flatness of ground

larger if the time available is more

larger for accurate works

inversely proportional to the scale of the map

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

increasing the viscosity of liquid

decreasing the radius of curvature of tube

increasing the diameter of the tube

decreasing the length of bubble

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11. 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°

20°

160°

50°

12. 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

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

30°

45°

60°

90°

14. Normal tension is that pull which

neutralizes the effect due to pull and sag

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

15. 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

16. Dumpy level is most suitable when

all of these

fly levelling is being done over long distance

the instrument is to be shifted frequently

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

17. Subtense bar is an instrument used for

measurement of angles

levelling

measurement of horizontal distances in undulated areas

measurement of horizontal distances in plane areas

18. 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°

19. The maximum tolerance in a 20m chain is

±2mm

±5mm

±8mm

±3mm

20. Contour interval is

the horizontal distance between two consecutive contours

the horizontal distance between two points on same contour

the vertical distance between two consecutive contours

the vertical distance between two points on same contour

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21. 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

true R.L

less than true R.L

22. The correction for sag is

always additive

always zero

sometimes additive and sometimes subtractive

always subtractive

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

cross-sections method

tacheometric method

direct method

square method

24. Cross staff is an instrument used for

measuring bearings of the lines

setting out right angles

none of these

measuring approximate horizontal angles

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

2m

5m

20m

10m

26. The rise and fall method

quicker and less tedious for large number of intermediate sights

is less accurate than height of instrument method

is not suitable for levelling with tilting levels

provides a check on the reduction of intermediate point levels

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. Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument

incorrect levelling of the magnetic needle

loss of magnetism of the needle

friction of the needle at the pivot

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

none of these

hillock

plain surface

depression

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

trigonometrical levelling

tacheometry

theodolite surveying

plane table surveying

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31. 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

32. A building is an obstacle to

ranging but not chaining

neither chaining nor ranging

both chaining and ranging

chaining but not ranging

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

remains unaffected

none of these

increases

decreases

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

cross staff

steel tape

optical square

line ranger

35. Benchmark is established by

hypsometry

trigonometrical levelling

barometric levelling

spirit levelling

36. 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

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

more accurate than rise and fall method

none of these

less accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

38. A series of closely spaced contour lines represents a

uniform slope

steep slope

gentle slope

plane surface

39. Three point problem can be solved by

Tracing paper method

Bessels method

all of these

Lehman's method

40. 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

Surveying MCQs Set-4

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