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Surveying
0

Surveying MCQs Set-4

March 21, 2021

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Page 1 of 4

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1. Three point problem can be solved by

Bessels method

Tracing paper method

all of these

Lehman's method

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2. The rise and fall method

is less accurate than height of instrument method

provides a check on the reduction of intermediate point levels

quicker and less tedious for large number of intermediate sights

is not suitable for levelling with tilting levels

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

river

building

hillock

none of these

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4. Benchmark is established by

spirit levelling

hypsometry

barometric levelling

trigonometrical levelling

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

steel tape

optical square

line ranger

cross staff

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6. Local attraction in compass surveying may exist due to

presence of magnetic substances near the instrument

loss of magnetism of the needle

incorrect levelling of the magnetic needle

friction of the needle at the pivot

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7. Normal tension is that pull which

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

makes the correction due to pull equal to zero

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

5m

2m

20m

10m

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9. A series of closely spaced contour lines represents a

plane surface

uniform slope

steep slope

gentle slope

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10. For a line AB

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

both are correct

none of them is correct

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

Page 2 of 4

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11. Dumpy level is most suitable when

the instrument is to be shifted frequently

all of these

fly levelling is being done over long distance

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

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12. Contour interval is

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

the horizontal distance between two consecutive contours

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

true R.L

less than true R.L

none of these

more than true R.L

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14. Theodolite is an instrument used for

measurement of both horizontal and vertical angles

measurement of vertical angles only

tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

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15. 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

is lighter than chain

can be easily repaired in the field

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16. The length of a chain is measured from

outside of one handle to inside of other handle

outside of one handle to outside of other handle

inside of one handle to inside of other handle

centre of one handle to centre of other handle

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

eastern side of the true meridian

western side of the true meridian

southern side of the true meridian

none of these

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18. The maximum tolerance in a 20m chain is

±5mm

±8mm

±3mm

±2mm

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19. Subtense bar is an instrument used for

measurement of angles

levelling

measurement of horizontal distances in undulated areas

measurement of horizontal distances in plane areas

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20. The allowable length of an offset depends upon the

scale of plotting

all of these

degree of accuracy required

method of setting out the perpendiculars and nature of ground

Page 3 of 4

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21. Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

none of these

measuring bearings of the lines

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22. 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

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

60°

30°

45°

90°

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24. The prismatic compass and surveyor's compass

both give QB of a line and WCB of a line

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

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25. 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°

160°

230°

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

decreasing the radius of curvature of tube

decreasing the length of bubble

increasing the diameter of the tube

increasing the viscosity of liquid

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27. In the prismatic compass

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

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

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

plain surface

none of these

hillock

depression

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

foresight and intermediate sight

backsight only

foresight only

foresight and backsight

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30. A building is an obstacle to

ranging but not chaining

chaining but not ranging

neither chaining nor ranging

both chaining and ranging

Page 4 of 4

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

295°

205°

335°

S 25° E

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

one

three

two

four

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

cross-sections method

direct method

tacheometric method

square method

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34. The correction for sag is

always additive

always zero

sometimes additive and sometimes subtractive

always subtractive

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35. Agate cap is fitted with a

level

cross staff

prismatic compass

chain

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

straightening the links

removing one or more small circular rings

all of these

closing the joints of the rings if opened out

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

theodolite surveying

tacheometry

plane table surveying

trigonometrical levelling

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

none of these

quicker and less tedious for large number of intermediate sights

more accurate than rise and fall method

less accurate than rise and fall method

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

none of these

increases

decreases

remains unaffected

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

local attraction

azimuth

declination

magnetic bearing

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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