Surveying MCQs Set-4

Page 1 of 4

1. In the prismatic compass

the magnetic needle moves with the box

the line of the sight does not move 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

2. The correction for sag is

sometimes additive and sometimes subtractive

always additive

always subtractive

always zero

3. 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

4. The length of a chain is measured from

centre of one handle to centre of other handle

outside of one handle to outside of other handle

inside of one handle to inside of other handle

outside of one handle to inside of other handle

5. 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

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

backsight only

foresight and backsight

foresight and intermediate sight

foresight only

7. A series of closely spaced contour lines represents a

uniform slope

steep slope

plane surface

gentle slope

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

hillock

building

river

none of these

9. 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

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

plane table surveying

tacheometry

trigonometrical levelling

theodolite surveying

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

plain surface

hillock

depression

none of these

12. A building is an obstacle to

chaining but not ranging

neither chaining nor ranging

both chaining and ranging

ranging but not chaining

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

60°

30°

90°

45°

14. Subtense bar is an instrument used for

levelling

measurement of angles

measurement of horizontal distances in plane areas

measurement of horizontal distances in undulated areas

15. Contour interval is

inversely proportional to the scale of the map

larger if the time available is more

larger for accurate works

directly proportional to the flatness of ground

16. Agate cap is fitted with a

prismatic compass

cross staff

level

chain

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

5m

2m

10m

20m

18. Theodolite is an instrument used for

measurement of horizontal angles only

measurement of vertical angles only

measurement of both horizontal and vertical angles

tightening the capstan-headed nuts of level tube

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

can be easily repaired in the field

is easier to handle

is lighter than chain

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

20. 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

closing the joints of the rings if opened out

all of these

straightening the links

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21. Dumpy level is most suitable when

all of these

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

22. 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

160°

230°

20°

50°

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

three

two

one

four

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

square method

cross-sections method

direct method

tacheometric method

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

none of these

southern side of the true meridian

western side of the true meridian

eastern side of the true meridian

26. 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

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

none of these

decreases

remains unaffected

increases

28. 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 less accurate than height of instrument method

is not suitable for levelling with tilting levels

29. The maximum tolerance in a 20m chain is

±2mm

±8mm

±3mm

±5mm

30. For a line AB

none of them is correct

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

both are correct

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

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31. If the staff is not held vertical at a leveling station, the reduced level calculated from the observation would be

true R.L

more than true R.L

none of these

less than true R.L

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

azimuth

local attraction

declination

magnetic bearing

33. The allowable length of an offset depends upon the

method of setting out the perpendiculars and nature of ground

all of these

scale of plotting

degree of accuracy required

34. Cross staff is an instrument used for

measuring bearings of the lines

measuring approximate horizontal angles

setting out right angles

none of these

35. The prismatic compass and surveyor's compass

both give WCB of a line

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

36. Three point problem can be solved by

Tracing paper method

Lehman's method

Bessels method

all of these

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

less accurate than rise and fall method

none of these

more accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

38. Benchmark is established by

barometric levelling

spirit levelling

trigonometrical levelling

hypsometry

39. 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°

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

optical square

steel tape

cross staff

line ranger

Surveying MCQs Set-4

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