Surveying MCQs Set-4

Page 1 of 4

1. In the prismatic compass

the line of the sight does not move with the box

the magnetic needle and graduated circle do not move with the box

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

2. Three point problem can be solved by

Bessels method

Lehman's method

all of these

Tracing paper method

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

three

one

two

four

4. Contour interval is

larger for accurate works

inversely proportional to the scale of the map

directly proportional to the flatness of ground

larger if the time available is more

5. Subtense bar is an instrument used for

levelling

measurement of horizontal distances in plane areas

measurement of angles

measurement of horizontal distances in undulated areas

6. 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

7. Contour interval is

the horizontal distance between two consecutive contours

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

the vertical distance between two points on same contour

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

30°

45°

90°

60°

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

declination

azimuth

local attraction

magnetic bearing

10. Benchmark is established by

trigonometrical levelling

hypsometry

spirit levelling

barometric levelling

Page 2 of 4

11. A building is an obstacle to

ranging but not chaining

both chaining and ranging

neither chaining nor ranging

chaining but not ranging

12. Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

none of these

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

205°

335°

S 25° E

295°

14. 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

15. A series of closely spaced contour lines represents a

uniform slope

gentle slope

steep slope

plane surface

16. Agate cap is fitted with a

level

chain

cross staff

prismatic compass

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

hillock

depression

plain surface

none of these

18. The maximum tolerance in a 20m chain is

±5mm

±3mm

±2mm

±8mm

19. 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

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

increasing the diameter of the tube

increasing the viscosity of liquid

decreasing the radius of curvature of tube

decreasing the length of bubble

Page 3 of 4

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

true R.L

none of these

more than true R.L

less than true R.L

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

cross staff

optical square

steel tape

line ranger

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

direct method

tacheometric method

square method

cross-sections method

24. The rise and fall method

quicker and less tedious for large number of intermediate sights

is not suitable for levelling with tilting levels

is less accurate than height of instrument method

provides a check on the reduction of intermediate point levels

25. The prismatic compass and surveyor's compass

both give QB of a line

both give QB of a line and WCB of a line

both give WCB of a line

give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively

26. Theodolite is an instrument used for

measurement of vertical angles only

measurement of horizontal angles only

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

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

building

river

hillock

none of these

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

more accurate than rise and fall method

less accurate than rise and fall method

none of these

quicker and less tedious for large number of intermediate sights

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

decreases

none of these

increases

remains unaffected

30. The length of a chain is measured from

inside of one handle to inside of other handle

outside of one handle to outside of other handle

centre of one handle to centre of other handle

outside of one handle to inside of other handle

Page 4 of 4

31. The correction for sag is

always zero

always additive

always subtractive

sometimes additive and sometimes subtractive

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

20m

10m

5m

2m

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

foresight only

foresight and intermediate sight

backsight only

foresight and backsight

34. Normal tension is that pull which

is used at the time of standardising the tape

makes the correction due to sag equal to zero

neutralizes the effect due to pull and sag

makes the correction due to pull equal to zero

35. For a line AB

none of them is correct

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

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

both are correct

36. 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

37. 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°

230°

160°

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

theodolite surveying

plane table surveying

tacheometry

trigonometrical levelling

39. If the length of a chain is found to be short on testing, it can be adjusted by

all of these

closing the joints of the rings if opened out

removing one or more small circular rings

straightening the links

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

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

is easier to handle

can be easily repaired in the field

is lighter than chain

Surveying MCQs Set-4

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