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

foresight and backsight

backsight only

foresight only

foresight and intermediate sight

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

tacheometric method

cross-sections method

square method

direct method

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

cross staff

optical square

steel tape

line ranger

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4. Contour interval is

the vertical distance between two consecutive contours

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

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5. The correction for sag is

sometimes additive and sometimes subtractive

always zero

always additive

always subtractive

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6. Agate cap is fitted with a

level

prismatic compass

chain

cross staff

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

60°

90°

45°

30°

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8. A building is an obstacle to

both chaining and ranging

ranging but not chaining

chaining but not ranging

neither chaining nor ranging

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

remains unaffected

increases

decreases

none of these

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

depression

hillock

none of these

plain surface

Page 2 of 4

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

building

hillock

river

none of these

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12. A series of closely spaced contour lines represents a

plane surface

steep slope

uniform slope

gentle slope

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

quicker and less tedious for large number of intermediate sights

none of these

less accurate than rise and fall method

more accurate than rise and fall method

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

increasing the viscosity of liquid

decreasing the length of bubble

decreasing the radius of curvature of tube

increasing the diameter of the tube

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

three

four

two

one

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16. 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

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17. Dumpy level is most suitable when

all of these

the instrument is to be shifted frequently

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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18. 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

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

azimuth

local attraction

declination

magnetic bearing

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

tacheometry

theodolite surveying

plane table surveying

trigonometrical levelling

Page 3 of 4

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21. Three point problem can be solved by

Bessels method

Lehman's method

Tracing paper method

all of these

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22. 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

closing the joints of the rings if opened out

all of these

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23. Benchmark is established by

barometric levelling

hypsometry

spirit levelling

trigonometrical levelling

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24. Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

loss of magnetism of the needle

friction of the needle at the pivot

presence of magnetic substances near the instrument

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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

230°

20°

50°

160°

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26. The prismatic compass and surveyor's compass

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

both give QB of a line

both give WCB of a line

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

20m

2m

10m

5m

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28. Subtense bar is an instrument used for

measurement of horizontal distances in plane areas

measurement of horizontal distances in undulated areas

levelling

measurement of angles

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

less than true R.L

none of these

more than true R.L

true R.L

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30. 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 4 of 4

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31. Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

none of these

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32. Theodolite is an instrument used for

tightening the capstan-headed nuts of level tube

measurement of both horizontal and vertical angles

measurement of vertical angles only

measurement of horizontal angles only

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33. The length of a chain is measured from

outside of one handle to outside of other handle

centre of one handle to centre of other handle

outside of one handle to inside of other handle

inside of one handle to inside of other handle

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34. The allowable length of an offset depends upon the

all of these

method of setting out the perpendiculars and nature of ground

scale of plotting

degree of accuracy required

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35. The rise and fall method

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

provides a check on the reduction of intermediate point levels

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36. Normal tension is that pull which

is used at the time of standardising the tape

makes the correction due to sag equal to zero

neutralizes the effect due to pull and sag

makes the correction due to pull equal to zero

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37. Contour interval is

inversely proportional to the scale of the map

larger for accurate works

larger if the time available is more

directly proportional to the flatness of ground

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

295°

S 25° E

335°

205°

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

is lighter than chain

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

can be easily repaired in the field

is easier to handle

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40. The maximum tolerance in a 20m chain is

±2mm

±3mm

±5mm

±8mm

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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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