Surveying MCQs Set-4

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1. In the prismatic compass

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

the magnetic needle moves with the box

the line of the sight does not move with the box

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

plain surface

depression

hillock

none of these

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

four

one

three

two

4. 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°

230°

20°

5. Cross staff is an instrument used for

measuring approximate horizontal angles

none of these

measuring bearings of the lines

setting out right angles

6. For a line AB

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

none of them is correct

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

both are correct

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

azimuth

declination

magnetic bearing

local attraction

8. 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

more than true R.L

none of these

true R.L

9. 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

all of these

removing one or more small circular rings

straightening the links

10. The rise and fall method

quicker and less tedious for large number of intermediate sights

is not suitable for levelling with tilting levels

provides a check on the reduction of intermediate point levels

is less accurate than height of instrument method

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11. 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

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

tacheometric method

cross-sections method

square method

direct method

13. A building is an obstacle to

chaining but not ranging

ranging but not chaining

both chaining and ranging

neither chaining nor ranging

14. Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

loss of magnetism of the needle

presence of magnetic substances near the instrument

friction of the needle at the pivot

15. The maximum tolerance in a 20m chain is

±5mm

±2mm

±3mm

±8mm

16. Agate cap is fitted with a

cross staff

prismatic compass

chain

level

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

trigonometrical levelling

plane table surveying

theodolite surveying

tacheometry

18. The allowable length of an offset depends upon the

scale of plotting

all of these

degree of accuracy required

method of setting out the perpendiculars and nature of ground

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

is easier to handle

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

is lighter than chain

can be easily repaired in the field

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

none of these

eastern side of the true meridian

western side of the true meridian

southern side of the true meridian

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21. Normal tension is that pull which

neutralizes the effect due to pull and sag

makes the correction due to sag equal to zero

makes the correction due to pull equal to zero

is used at the time of standardising the tape

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

90°

45°

30°

60°

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

20m

2m

10m

5m

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

cross staff

line ranger

optical square

steel tape

25. Theodolite is an instrument used for

measurement of vertical angles only

tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

measurement of both horizontal and vertical angles

26. A series of closely spaced contour lines represents a

uniform slope

gentle slope

plane surface

steep slope

27. 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

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

remains unaffected

decreases

increases

none of these

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

foresight only

backsight only

foresight and backsight

foresight and intermediate sight

30. Dumpy level is most suitable when

all of these

the instrument is to be shifted frequently

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

fly levelling is being done over long distance

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

increasing the viscosity of liquid

increasing the diameter of the tube

decreasing the length of bubble

decreasing the radius of curvature of tube

32. Benchmark is established by

spirit levelling

hypsometry

trigonometrical levelling

barometric levelling

33. 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

34. Three point problem can be solved by

Bessels method

Tracing paper method

Lehman's method

all of these

35. 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

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

hillock

none of these

river

building

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

S 25° E

295°

335°

205°

38. The correction for sag is

always additive

always subtractive

sometimes additive and sometimes subtractive

always zero

39. Contour interval is

larger if the time available is more

larger for accurate works

directly proportional to the flatness of ground

inversely proportional to the scale of the map

40. Contour interval is

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

the horizontal distance between two consecutive contours

the vertical distance between two points on same contour

Surveying MCQs Set-4

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