Surveying MCQs Set-4

Page 1 of 4

1. A series of closely spaced contour lines represents a

uniform slope

gentle slope

steep slope

plane surface

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

increasing the viscosity of liquid

decreasing the length of bubble

decreasing the radius of curvature of tube

increasing the diameter of the tube

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

eastern side of the true meridian

southern side of the true meridian

none of these

western side of the true meridian

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

5m

2m

20m

10m

5. 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

6. For a line AB

both are correct

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°

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

trigonometrical levelling

plane table surveying

tacheometry

theodolite surveying

8. 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

less than true R.L

none of these

9. The length of a chain is measured from

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

outside of one handle to outside of other handle

10. Normal tension is that pull which

neutralizes the effect due to pull and sag

makes the correction due to pull equal to zero

makes the correction due to sag equal to zero

is used at the time of standardising the tape

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11. A building is an obstacle to

neither chaining nor ranging

chaining but not ranging

both chaining and ranging

ranging but not chaining

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

hillock

depression

none of these

plain surface

13. The maximum tolerance in a 20m chain is

±2mm

±8mm

±5mm

±3mm

14. Theodolite is an instrument used for

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

measurement of vertical angles only

measurement of horizontal angles only

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

205°

335°

295°

S 25° E

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

none of these

decreases

remains unaffected

increases

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

steel tape

cross staff

optical square

line ranger

18. Subtense bar is an instrument used for

measurement of angles

measurement of horizontal distances in undulated areas

measurement of horizontal distances in plane areas

levelling

19. Contour interval is

larger if the time available is more

directly proportional to the flatness of ground

larger for accurate works

inversely proportional to the scale of the map

20. 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

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21. 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 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

22. Cross staff is an instrument used for

setting out right angles

none of these

measuring approximate horizontal angles

measuring bearings of the lines

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

three

one

four

two

24. 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

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

backsight only

foresight only

foresight and intermediate sight

foresight and backsight

26. Agate cap is fitted with a

chain

prismatic compass

level

cross staff

27. Three point problem can be solved by

all of these

Bessels method

Tracing paper method

Lehman's method

28. 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

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

none of these

building

hillock

river

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

is lighter than chain

is easier to handle

can be easily repaired in the field

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

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

azimuth

declination

magnetic bearing

local attraction

32. Contour interval is

the vertical distance between two points on same contour

the vertical distance between two consecutive contours

the horizontal distance between two consecutive contours

the horizontal distance between two points on same contour

33. Benchmark is established by

barometric levelling

trigonometrical levelling

spirit levelling

hypsometry

34. The rise and fall method

provides a check on the reduction of intermediate point levels

is not suitable for levelling with tilting levels

is less accurate than height of instrument method

quicker and less tedious for large number of intermediate sights

35. The correction for sag is

always zero

sometimes additive and sometimes subtractive

always subtractive

always additive

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

60°

90°

30°

45°

37. The allowable length of an offset depends upon the

scale of plotting

all of these

method of setting out the perpendiculars and nature of ground

degree of accuracy required

38. 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

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

direct method

cross-sections method

tacheometric method

square method

40. 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°

20°

160°

230°

Surveying MCQs Set-4

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