Surveying MCQs Set-4

Page 1 of 4

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

none of these

more than true R.L

less than true R.L

true R.L

2. Subtense bar is an instrument used for

levelling

measurement of horizontal distances in plane areas

measurement of horizontal distances in undulated areas

measurement of angles

3. The rise and fall method

provides a check on the reduction of intermediate point levels

quicker and less tedious for large number of intermediate sights

is less accurate than height of instrument method

is not suitable for levelling with tilting levels

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

steel tape

cross staff

optical square

line ranger

5. 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

20°

50°

230°

160°

6. A series of closely spaced contour lines represents a

uniform slope

plane surface

steep slope

gentle slope

7. Benchmark is established by

spirit levelling

barometric levelling

hypsometry

trigonometrical levelling

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

two

one

four

three

9. The maximum tolerance in a 20m chain is

±3mm

±5mm

±8mm

±2mm

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

local attraction

magnetic bearing

azimuth

declination

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11. Theodolite is an instrument used for

measurement of horizontal angles only

measurement of vertical angles only

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

12. Agate cap is fitted with a

level

cross staff

chain

prismatic compass

13. For a line AB

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

none of them is correct

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

205°

295°

335°

S 25° E

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

hillock

river

none of these

building

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

tacheometry

theodolite surveying

plane table surveying

trigonometrical levelling

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

western side of the true meridian

southern side of the true meridian

none of these

eastern side of the true meridian

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

depression

hillock

none of these

plain surface

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

decreasing the radius of curvature of tube

increasing the diameter of the tube

decreasing the length of bubble

increasing the viscosity of liquid

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

none of these

increases

decreases

remains unaffected

Page 3 of 4

21. 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

22. Cross staff is an instrument used for

none of these

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

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

less accurate than rise and fall method

quicker and less tedious for large number of intermediate sights

more accurate than rise and fall method

none of these

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

foresight and intermediate sight

foresight only

backsight only

foresight and backsight

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

60°

45°

30°

90°

26. Dumpy level is most suitable when

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

fly levelling is being done over long distance

all of these

the instrument is to be shifted frequently

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

is lighter than chain

can be easily repaired in the field

is easier to handle

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

28. The prismatic compass and surveyor's compass

both give WCB of a line

both give QB 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 and WCB of a line

29. The correction for sag is

always zero

sometimes additive and sometimes subtractive

always subtractive

always additive

30. The allowable length of an offset depends upon the

degree of accuracy required

method of setting out the perpendiculars and nature of ground

scale of plotting

all of these

Page 4 of 4

31. Contour interval is

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

the horizontal distance between two consecutive contours

the vertical distance between two points on same contour

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

5m

20m

10m

2m

33. The length of a chain is measured from

outside of one handle to outside of other handle

outside of one handle to inside of other handle

centre of one handle to centre of other handle

inside of one handle to inside of other handle

34. Three point problem can be solved by

Lehman's method

Bessels method

Tracing paper method

all of these

35. Contour interval is

larger for accurate works

directly proportional to the flatness of ground

larger if the time available is more

inversely proportional to the scale of the map

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

direct method

cross-sections method

square method

tacheometric method

37. Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument

incorrect levelling of the magnetic needle

friction of the needle at the pivot

loss of magnetism of the needle

38. 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

all of these

removing one or more small circular rings

straightening the links

39. A building is an obstacle to

neither chaining nor ranging

chaining but not ranging

both chaining and ranging

ranging but not chaining

40. In the prismatic compass

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

the line of the sight does not move 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 moves with the box

Surveying MCQs Set-4

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