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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. 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

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2. 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 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

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3. Contour interval is

the horizontal distance between two consecutive contours

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

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

increasing the viscosity of liquid

decreasing the length of bubble

increasing the diameter of the tube

decreasing the radius of curvature of tube

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5. Cross staff is an instrument used for

measuring approximate horizontal angles

measuring bearings of the lines

none of these

setting out right angles

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6. The prismatic compass and surveyor's compass

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 WCB of a line

both give QB of a line

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7. 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

the instrument is to be shifted frequently

all of these

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

less accurate than rise and fall method

none of these

quicker and less tedious for large number of intermediate sights

more accurate than rise and fall method

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9. The correction for sag is

always zero

sometimes additive and sometimes subtractive

always additive

always subtractive

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10. Normal tension is that pull which

makes the correction due to sag equal to zero

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

Page 2 of 4

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11. For a line AB

none of them is correct

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

both are correct

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

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

theodolite surveying

trigonometrical levelling

plane table surveying

tacheometry

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13. Benchmark is established by

hypsometry

trigonometrical levelling

barometric levelling

spirit levelling

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

azimuth

local attraction

magnetic bearing

declination

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15. Contour interval is

directly proportional to the flatness of ground

larger for accurate works

larger if the time available is more

inversely proportional to the scale of the map

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16. 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

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

60°

45°

30°

90°

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

foresight and intermediate sight

backsight only

foresight and backsight

foresight only

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

river

none of these

hillock

building

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

is easier to handle

is lighter than chain

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

hillock

depression

plain surface

none of these

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22. 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

outside of one handle to inside of other handle

centre of one handle to centre of other handle

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

straightening the links

closing the joints of the rings if opened out

removing one or more small circular rings

all of these

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24. Three point problem can be solved by

Bessels method

all of these

Lehman's method

Tracing paper method

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

three

four

two

one

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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

20°

50°

230°

160°

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27. The maximum tolerance in a 20m chain is

±8mm

±5mm

±3mm

±2mm

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28. Theodolite is an instrument used for

measurement of horizontal angles only

measurement of both horizontal and vertical angles

measurement of vertical angles only

tightening the capstan-headed nuts of level tube

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

cross staff

line ranger

steel tape

optical square

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30. The allowable length of an offset depends upon the

method of setting out the perpendiculars and nature of ground

degree of accuracy required

all of these

scale of plotting

Page 4 of 4

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

increases

decreases

remains unaffected

none of these

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32. A building is an obstacle to

chaining but not ranging

ranging but not chaining

neither chaining nor ranging

both chaining and ranging

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

direct method

cross-sections method

square method

tacheometric method

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

295°

S 25° E

205°

335°

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35. 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 not suitable for levelling with tilting levels

is less accurate than height of instrument method

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36. Agate cap is fitted with a

cross staff

chain

level

prismatic compass

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

5m

10m

20m

2m

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38. 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

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

southern side of the true meridian

eastern side of the true meridian

none of these

western side of the true meridian

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40. A series of closely spaced contour lines represents a

plane surface

gentle slope

steep slope

uniform slope

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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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