Surveying MCQs Set-4

Page 1 of 4

1. 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°

50°

230°

20°

2. The length of a chain is measured from

outside of one handle to outside of other handle

centre of one handle to centre of other handle

inside of one handle to inside of other handle

outside of one handle to inside of other handle

3. 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

4. Contour interval is

the vertical distance between two points on same contour

the horizontal distance between two consecutive contours

the horizontal distance between two points on same contour

the vertical distance between two consecutive contours

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

river

hillock

building

none of these

6. The correction for sag is

sometimes additive and sometimes subtractive

always zero

always additive

always subtractive

7. The allowable length of an offset depends upon the

degree of accuracy required

scale of plotting

method of setting out the perpendiculars and nature of ground

all of these

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

increases

decreases

remains unaffected

none of these

9. Cross staff is an instrument used for

setting out right angles

none of these

measuring bearings of the lines

measuring approximate horizontal angles

10. 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

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

cross staff

line ranger

steel tape

optical square

12. A series of closely spaced contour lines represents a

steep slope

gentle slope

plane surface

uniform slope

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

tacheometric method

cross-sections method

direct method

square method

14. Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument

friction of the needle at the pivot

incorrect levelling of the magnetic needle

loss of magnetism of the needle

15. Contour interval is

inversely proportional to the scale of the map

larger if the time available is more

directly proportional to the flatness of ground

larger for accurate works

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

205°

S 25° E

295°

335°

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

plane table surveying

tacheometry

theodolite surveying

trigonometrical levelling

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

local attraction

declination

azimuth

magnetic bearing

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

western side of the true meridian

eastern side of the true meridian

southern side of the true meridian

none of these

20. A building is an obstacle to

neither chaining nor ranging

both chaining and ranging

chaining but not ranging

ranging but not chaining

Page 3 of 4

21. 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

removing one or more small circular rings

all of these

straightening the links

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

increasing the diameter of the tube

decreasing the length of bubble

decreasing the radius of curvature of tube

increasing the viscosity of liquid

23. The rise and fall method

is less accurate than height of instrument 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

24. Normal tension is that pull which

neutralizes the effect due to pull and sag

makes the correction due to pull equal to zero

is used at the time of standardising the tape

makes the correction due to sag equal to zero

25. The maximum tolerance in a 20m chain is

±3mm

±8mm

±2mm

±5mm

26. Three point problem can be solved by

Bessels method

Lehman's method

Tracing paper method

all of these

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

20m

2m

5m

10m

28. For a line AB

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

none of them is correct

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

both are correct

29. Benchmark is established by

barometric levelling

trigonometrical levelling

spirit levelling

hypsometry

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

foresight and backsight

backsight only

foresight only

foresight and intermediate sight

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31. In the prismatic compass

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

the line of the sight does not move with the box

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

depression

hillock

plain surface

none of these

33. 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

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

is easier to handle

is lighter than chain

35. Agate cap is fitted with a

cross staff

prismatic compass

chain

level

36. The prismatic compass and surveyor's compass

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

both give QB of a line and WCB of a line

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

30°

60°

90°

45°

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

true R.L

less than true R.L

more than true R.L

none of these

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

one

three

two

four

40. 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

Surveying MCQs Set-4

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