Surveying MCQs Set-4

Page 1 of 4

1. Subtense bar is an instrument used for

measurement of horizontal distances in plane areas

measurement of angles

levelling

measurement of horizontal distances in undulated areas

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

all of these

removing one or more small circular rings

closing the joints of the rings if opened out

straightening the links

3. Three point problem can be solved by

Tracing paper method

Bessels method

all of these

Lehman's method

4. A building is an obstacle to

both chaining and ranging

neither chaining nor ranging

ranging but not chaining

chaining but not ranging

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

335°

S 25° E

205°

295°

6. The prismatic compass and surveyor's compass

both give WCB 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

both give QB of a line

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

trigonometrical levelling

theodolite surveying

plane table surveying

tacheometry

8. The correction for sag is

always subtractive

always additive

sometimes additive and sometimes subtractive

always zero

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

2m

10m

5m

20m

10. The length of a chain is measured from

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

centre of one handle to centre of other handle

Page 2 of 4

11. 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°

160°

20°

230°

12. Cross staff is an instrument used for

setting out right angles

measuring bearings of the lines

none of these

measuring approximate horizontal angles

13. 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

more than true R.L

true R.L

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

river

building

none of these

hillock

15. Agate cap is fitted with a

cross staff

prismatic compass

chain

level

16. Dumpy level is most suitable when

fly levelling is being done over long distance

all of these

the instrument is to be shifted frequently

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

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

30°

45°

60°

90°

18. Benchmark is established by

trigonometrical levelling

spirit levelling

barometric levelling

hypsometry

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

depression

hillock

none of these

plain surface

20. 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 and graduated circle do not move with the box

the line of the sight does not move with the box

the magnetic needle moves with the box

Page 3 of 4

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

square method

cross-sections method

direct method

tacheometric method

22. The maximum tolerance in a 20m chain is

±8mm

±2mm

±3mm

±5mm

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

optical square

cross staff

line ranger

steel tape

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

increases

none of these

decreases

remains unaffected

25. Theodolite is an instrument used for

measurement of horizontal angles only

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

measurement of vertical angles only

26. 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 lighter than chain

is easier to handle

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

27. The rise and fall method

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

provides a check on the reduction of intermediate point levels

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

foresight and intermediate sight

foresight and backsight

foresight only

backsight only

29. 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

30. Local attraction in compass surveying may exist due to

friction of the needle at the pivot

loss of magnetism of the needle

presence of magnetic substances near the instrument

incorrect levelling of the magnetic needle

Page 4 of 4

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

quicker and less tedious for large number of intermediate sights

less accurate than rise and fall method

more accurate than rise and fall method

none of these

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

southern side of the true meridian

eastern side of the true meridian

western side of the true meridian

none of these

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

azimuth

declination

local attraction

magnetic bearing

34. 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

35. Contour interval is

the vertical distance between two points on same contour

the vertical distance between two consecutive contours

the horizontal distance between two points on same contour

the horizontal distance between two consecutive contours

36. 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

37. 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

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

two

four

one

three

39. A series of closely spaced contour lines represents a

plane surface

steep slope

gentle slope

uniform slope

40. Contour interval is

larger if the time available is more

inversely proportional to the scale of the map

larger for accurate works

directly proportional to the flatness of ground

Surveying MCQs Set-4

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Surveying MCQs Set-4

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection