Surveying MCQs Set-4

Page 1 of 4

1. Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

none of these

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

western side of the true meridian

none of these

southern side of the true meridian

eastern side of the true meridian

3. Three point problem can be solved by

all of these

Lehman's method

Tracing paper method

Bessels method

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

hillock

depression

none of these

plain surface

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

is lighter than chain

6. The allowable length of an offset depends upon the

method of setting out the perpendiculars and nature of ground

degree of accuracy required

scale of plotting

all of these

7. Contour interval is

the horizontal distance between two consecutive contours

the vertical distance between two points on same contour

the horizontal distance between two points on same contour

the vertical distance between two consecutive contours

8. A building is an obstacle to

neither chaining nor ranging

ranging but not chaining

both chaining and ranging

chaining but not ranging

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

335°

205°

S 25° E

295°

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

three

four

one

two

Page 2 of 4

11. 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

12. Contour interval is

directly proportional to the flatness of ground

inversely proportional to the scale of the map

larger for accurate works

larger if the time available is more

13. The correction for sag is

always additive

always zero

sometimes additive and sometimes subtractive

always subtractive

14. The length of a chain is measured from

outside of one handle to inside of other handle

inside of one handle to inside of other handle

centre of one handle to centre of other handle

outside of one handle to outside of other handle

15. The rise and fall method

is less accurate than height of instrument method

is not suitable for levelling with tilting levels

quicker and less tedious for large number of intermediate sights

provides a check on the reduction of intermediate point levels

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

none of these

remains unaffected

increases

decreases

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

10m

5m

20m

2m

18. Normal tension is that pull which

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

neutralizes the effect due to pull and sag

19. 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

all of these

straightening the links

closing the joints of the rings if opened out

20. For a line AB

both are correct

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

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

none of them is correct

Page 3 of 4

21. The maximum tolerance in a 20m chain is

±2mm

±3mm

±8mm

±5mm

22. Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

presence of magnetic substances near the instrument

loss of magnetism of the needle

friction of the needle at the pivot

23. Benchmark is established by

barometric levelling

trigonometrical levelling

hypsometry

spirit levelling

24. Dumpy level is most suitable when

all of these

the instrument is to be shifted frequently

fly levelling is being done over long distance

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

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

azimuth

declination

local attraction

magnetic bearing

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

45°

30°

60°

90°

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

more accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

less accurate than rise and fall method

none of these

28. Theodolite is an instrument used for

measurement of both horizontal and vertical angles

measurement of vertical angles only

measurement of horizontal angles only

tightening the capstan-headed nuts of level tube

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

tacheometric method

square method

direct method

cross-sections method

30. 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

true R.L

none of these

more than true R.L

Page 4 of 4

31. 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°

20°

230°

32. Subtense bar is an instrument used for

levelling

measurement of horizontal distances in undulated areas

measurement of angles

measurement of horizontal distances in plane areas

33. Agate cap is fitted with a

cross staff

chain

prismatic compass

level

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

trigonometrical levelling

plane table surveying

tacheometry

theodolite surveying

35. 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

36. A series of closely spaced contour lines represents a

gentle slope

plane surface

steep slope

uniform slope

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

building

river

none of these

hillock

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

cross staff

steel tape

line ranger

optical square

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

backsight only

foresight and intermediate sight

foresight and backsight

foresight only

40. The prismatic compass and surveyor's compass

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

both give QB of a line

both give WCB of a line

Surveying MCQs Set-4

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