Surveying MCQs Set-4

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

foresight and intermediate sight

foresight and backsight

foresight only

backsight only

2. 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

straightening the links

removing one or more small circular rings

3. The length of a chain is measured from

inside of one handle to inside of other handle

centre of one handle to centre of other handle

outside of one handle to inside of other handle

outside of one handle to outside of other handle

4. Cross staff is an instrument used for

measuring approximate horizontal angles

none of these

measuring bearings of the lines

setting out right angles

5. In the prismatic compass

the magnetic needle and graduated circle do 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

the line of the sight does not move with the box

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

river

building

hillock

none of these

7. Theodolite is an instrument used for

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

measurement of horizontal angles only

measurement of vertical angles only

8. 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

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

optical square

line ranger

cross staff

steel tape

10. Agate cap is fitted with a

cross staff

level

chain

prismatic compass

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11. 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

12. A series of closely spaced contour lines represents a

uniform slope

plane surface

steep slope

gentle slope

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°

none of them is correct

both are correct

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

one

two

three

four

15. Normal tension is that pull which

is used at the time of standardising the tape

makes the correction due to pull equal to zero

makes the correction due to sag equal to zero

neutralizes the effect due to pull and sag

16. The allowable length of an offset depends upon the

all of these

degree of accuracy required

method of setting out the perpendiculars and nature of ground

scale of plotting

17. Contour interval is

the horizontal distance between two points on same contour

the vertical distance between two points on same contour

the horizontal distance between two consecutive contours

the vertical distance between two consecutive contours

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

tacheometry

plane table surveying

trigonometrical levelling

theodolite surveying

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

tacheometric method

direct method

square method

cross-sections method

20. The correction for sag is

always zero

always subtractive

always additive

sometimes additive and sometimes subtractive

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21. A building is an obstacle to

neither chaining nor ranging

both chaining and ranging

chaining but not ranging

ranging but not chaining

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

none of these

less than true R.L

true R.L

more than true R.L

23. Subtense bar is an instrument used for

measurement of horizontal distances in plane areas

levelling

measurement of horizontal distances in undulated areas

measurement of angles

24. 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

can be easily repaired in the field

is lighter than chain

is easier to handle

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

depression

hillock

none of these

plain surface

26. 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°

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

azimuth

local attraction

magnetic bearing

declination

28. 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

none of these

more accurate than rise and fall method

29. The rise and fall method

is not suitable for levelling with tilting levels

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

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

20m

5m

2m

10m

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

90°

30°

60°

45°

32. The maximum tolerance in a 20m chain is

±3mm

±5mm

±2mm

±8mm

33. Three point problem can be solved by

all of these

Bessels method

Tracing paper method

Lehman's method

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

increasing the diameter of the tube

decreasing the radius of curvature of tube

increasing the viscosity of liquid

decreasing the length of bubble

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

increases

none of these

remains unaffected

decreases

36. 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°

37. Contour interval is

larger for accurate works

directly proportional to the flatness of ground

inversely proportional to the scale of the map

larger if the time available is more

38. Benchmark is established by

hypsometry

barometric levelling

trigonometrical levelling

spirit levelling

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

none of these

eastern side of the true meridian

western side of the true meridian

southern side of the true meridian

40. Dumpy level is most suitable when

all of these

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

fly levelling is being done over long distance

the instrument is to be shifted frequently

Surveying MCQs Set-4

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