### Civil Engineering - Surveying MCQs Part 5

1. The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called

A.

brightness of telescope

brightness of telescope

B.

magnification of telescope

magnification of telescope

C.

resolving power of telescope

resolving power of telescope

D.

none of these.

none of these.

**Answer Option C**

2. Bergchrund is a topograhical feature in

A.

plains

plains

B.

water bodies

water bodies

C.

hills

hills

D.

glaciated region

glaciated region

**Answer Option D**

3. To orient a plane table at a point P roughly south of the mid-point of two inaccessible conical hill stations A and B in the plains, a point C is selected in line with AB and table is oriented at C by bringing ab in line with AB. A ray is then drawn towards P and at P the table is oriented by back ray method. The orientation so obtained, is

A.

unique and correct

unique and correct

B.

incorrect

incorrect

C.

manifold and correct

manifold and correct

D.

not reliable.

not reliable.

**Answer Option C**

4. Which one of the following statements is correct ?

A.

when the axes of rotation of the graduated circle and the verniers are not coincident, the instrument possesses eccentricity

when the axes of rotation of the graduated circle and the verniers are not coincident, the instrument possesses eccentricity

B.

the mean of the readings of the two verniers gives correct reading free from the eccentricity

the mean of the readings of the two verniers gives correct reading free from the eccentricity

C.

one vernier may be used if the readings of two verniers differ by a constant

one vernier may be used if the readings of two verniers differ by a constant

D.

all the above.

all the above.

**Answer Option D**

5. Pick up the correct statement from the following

A.

1 second of arc corresponds to a displacement ratio of 1:206, 300

1 second of arc corresponds to a displacement ratio of 1:206, 300

B.

1 degree of arc corresponds to a displacement ratio of 1:57

1 degree of arc corresponds to a displacement ratio of 1:57

C.

the angular errors tend to propagate themselves along a traverse as the square root of the number of stations

the angular errors tend to propagate themselves along a traverse as the square root of the number of stations

D.

the errors arising from the linear measures tend to be roughly proportional to the lengths of the lines

the errors arising from the linear measures tend to be roughly proportional to the lengths of the lines

E.

all the above.

all the above.

**Answer Option E**

6. The chaining on sloping ground is

A. easier along the falling gradient

B. easier along the up gradient

C. equally convenient along falling as well as up gradient

D. all the above.

**Answer Option A**

7. Profile levelling is usually done for determining

A. contours of an area

B. capacity of a reservoir

C. elevations along a straight line

D. boundaries of property

**Answer Option C**

8. The conventional sign shown in below figure represents a

A. road bridge

B. railway bridge

C. canal bridge

D. aquaduct.

**Answer Option A**

9. For indirect ranging, number of ranging rods required, is

A. 1

B. 2

C. 3

D. 4

E. 5

**Answer Option D**

10. Correction per chain length of 100 links along a slope having a rise of 1 unit in n horizontal units, is

A.

B. 100 n2

C.

D. .

**Answer Option A**

11. The operation of resection involves the following stepsrough orientation of the plane tablethe three lines form a triangle of errordrawing lines back through the three control pointsselect a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwisethe points obtained by three rays is the correct location. The correct sequence is

A. 1, 3, 2, 4, 5

B. 1, 2, 3, 4, 5

C. 1, 4, 3, 2, 5

D. 1, 4, 2, 3, 5

**Answer Option A**

12. The ratio of the length of long chord and the tangent length of a circular curve of radius R deflecting through angle Δ, is

A. sin

B. cos

C. tan

D. 2 sin

E. 2 cos .

**Answer Option E**

13. To avoid large centering error with very short legs, observations are generally made

A. to chain pins

B. by using optical system for centering the theodolite

C. to a target fixed on theodolite tripod on which theodolite may be fitted easily

D. all the above.

**Answer Option C**

14. During secular variation of magnetic meridian at different places

A. range of oscillations is constant

B. period of oscillation is constant

C. range and period of oscillation both vary

D. period of oscillation only varies.

**Answer Option C**

15. Designation of a curve is made by :

A. angle subtended by a chord of any length

B. angle subtended by an arc of specified length

C. radius of the curve

D. curvature of the curve.

**Answer Option C**

16. If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs, the accuracy of the traverse may be improved by

A. taking short legs

B. making repeated observations of angular and linear measurements

C. making a subsidiary traverse to determine the length of a long leg

D. all the above.

**Answer Option C**

17. Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to

A. shift

B. twice the shift

C. thrice the shift

D. four times the shift.

**Answer Option D**

18. Rankine's deflection angle in minutes is obtained by multiplying the length of the chord by

A. degree of the curve

B. square of the degree of the curve

C. inverse of the degree of the curve

D. none of these.

**Answer Option A**

19. The approximate formula for radial or perpendicular offsets from the tangent, is

A.

B.

C.

D.

**Answer Option B**

20. The line of collimation method of reduction of levels, does not provide a check on

A. intermediate sights

B. fore sights

C. back sights

D. reduced levels.

**Answer Option A**

21. If L is the specified length of a tape, L1 its actual length and S the measured distance, then, the true distance is given by the formula,

A.

B.

C.

D. .

**Answer Option A**

22. The method of reversal

A. is usually directed to examine whether a certain part is truly parallel or perpendicular to another

B. makes the erroneous relationship between parts evident

C. both (a) and (b)

D. neither (a) nor (b).

**Answer Option C**

23. You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the method of

A. repetition

B. reiteration

C. double observations

D. exactness.

**Answer Option A**

24. If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for

A. horizontal sights

B. inclined sights upward

C. inclined sight downward

D. none of these.

**Answer Option A**

25. If the whole circle bearing of a line is 180°, its reduced bearing is

A. S 0° E

B. S 0° W

C. S

D. N.

**Answer Option C**

26. The chord of a curve less than peg interval, is known as

A. small chord

B. sub-chord

C. normal chord

D. short chord.

**Answer Option B**

27. Mistakes which may produce a very serious effect upon the final results arise due to

A. in attention

B. in experience

C. carelessness

D. all of these.

**Answer Option D**

28. A well conditioned triangle has no angle less than

A. 20°

B. 30°

C. 45°

D. 60°.

**Answer Option B**

29. Contour lines of different elevations can unite to form one line, only in the case of

A. a vertical cliff

B. a saddle

C. a water shed line

D. a hill top.

**Answer Option A**

30. The line of sight is kept as high above ground surface as possible to minimise the error in the observed angles due to

A. shimmering

B. horizontal refraction

C. vertical refraction

D. both shimmering and horizontal refraction.

**Answer Option D**

31. The smaller horizontal angle between the true meridian and a survey line, is known

A. declination

B. bearing

C. azimuth

D. dip.

**Answer Option C**

32. The distance between terminal points computed from a subsidiary traverse run between them, is generally known, as

A. traverse leg

B. a base

C. traverse base

D. all the above.

**Answer Option C**

33. For locating a distant object visible from two transit stations, the method usually preferred to, is

A. Angles and distances from transit stations

B. Angles from two transit stations

C. distance from two transit stations

D. Angle from one transit station and distance from the other.

**Answer Option B**

34. Accidental or compensating errors of length L are proportional to

A. L

B. L

C.

D. 1/L.

**Answer Option B**

35. Tacheometric formula for horizontal distances using horizontal sights can also suitable be employed for inclined sights through θ by multiplying

A. the constants by sin2 θ

B. the constants by cos2 θ

C. the constants by cos θ

D. the constants by sin θ

E. the multiplying constant by cos2 θ and additive constant by cos θ.

**Answer Option E**

36. Number of subdivisions per metre length of a levelling staff is

A. 100

B. 200

C. 500

D. 1000

**Answer Option B**

37. A lemniscate curve between the tangents will be transitional throughout if the polar deflection angle of its apex, is

A.

B.

C.

D.

E.

**Answer Option E**

38. Pick up the wrong statement from the following :

A. the diaphragm is placed between the eyepiece and the objective but nearer to the former

B. the diaphragm is placed between the eyepiece and the objective but nearer to the later

C. the outer component of the objective is a double-convex lens of crown glass

D. the inner component of the objective is a flint glass, convexo-concave

E. all the above.

**Answer Option B**

39. Prolongation of chain line across an obstruction in chain surveying, is done by

A. making angular measurements

B. drawing perpendiculars with a chain

C. solution of triangles

D. all the above.

**Answer Option B**

40. Check lines (or proof lines) in Chain Surveying, are essentially required

A. to plot the chain lines

B. to plot the offsets

C. to indicate the accuracy of the survey work

D. to increase the out-turn

**Answer Option C**

41. While measuring the distance between two points along upgrade with the help of a 20 m chain, the forward end of the chain is shifted forward through a distance

A. 20 (sin θ - 1)

B. 20 (cos θ - 1)

C. 20 (sec θ - 1)

D. 20 (cosec θ - 1).

**Answer Option C**

42. Subtense tacheometry is generally preferred to if ground is

A. flat

B. undulating

C. mountaineous

D. deserts.

**Answer Option B**

43. For high sensivity of the bubble tube

A. a liquid of low viscosity is used

B. a liquid of low surface tension is used

C. the bubble space should be long

D. the bubble tube should not be too narrow

E. all the above.

**Answer Option E**

44. Short offsets are measured with

A. an ordinary chain

B. an invar tape

C. a metallic tape

D. a steel tape.

**Answer Option A**

45. The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known

A. levelling

B. centering

C. orientation

D. setting.

**Answer Option C**

46. There are two stations A and B. Which of the following statements is correct :

A. the fore bearing of AB is AB

B. the back bearing of AB is BA

C. the fore and back bearings of AB differ by 180°

D. all the above.

**Answer Option D**

47. Chain surveying is well adopted for

A. small areas in open ground

B. small areas with crowded details

C. large areas with simple details

D. large areas with difficult details.

**Answer Option A**

48. In a closed traverse, sum of south latitudes exceeds the sum of north latitudes and the sum of east departures exceeds the sum of west departures, then, the closing line will lie in

A. north-west quadrant

B. north east quadrant

C. south-east quadrant

D. south-west quadrant.

**Answer Option A**

49. A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is

A. 208.75 m

B. 202.75 m

C. 206.75 m

D. 211.75 m

**Answer Option C**

50. The Huygen's telescope eye piece

A. is aplanatic

B. achromatic

C. both (a) and (b)

D. neither (a) nor (b).

**Answer Option C**

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