Civil engineering survey objective question and answer

MULTIPLE-CHOICE QUESTIONS

I. Select the appropriate/correct option/options from the following questions.

1. Which of the following scale is the largest?

(a) 1 cm = 10 m

(b) 1 cm = 50 m

(d) RF =

Ans-A

2. The length of equatorial axis and polar axis of the earth are respectively

(a) 12713.80 km and 12756.75 km

(b) 12756.75 km and 12713.80 km

(d) 1275.675 km and 1271.380 km

Ans-B

3. The survey in which earth’s curvature is considered is known as

(a) plane surveying

(b) trigonometric surveying

(d) geodetic surveying

Ans-D

4. The difference in length of an arc and the straight line on the earth’s mean surface is only 1 mm in

distance of

(a) 1.2 km

(b) 2.4 km

(d) 4.8 km

Ans-A

5. The sum of the interior angles of a geometrical figure laid on the surface differs from the

corresponding plane figure to the extent on 1 second for about ______ square kilometer area.

(a) 50

(b) 100

(d) 200

Ans-D

6. In a diagonal scale only

(a) units can be shown

(b) units, tenths can be shown

(d) units, tenths, hundredths and thousandths can be shown

Ans-c

8. If n number of divisions on vernier scales coincide with n + 1 divisions on the main scale, the

vernier is known as

(a) direct vernier

(b) retrograde vernier

(d) extended vernier

Ans-B

9. If n divisions on vernier coincide with 2n – 1 divisions on the main scale, the vernier is known as

(a) direct vernier

(b) retrograde vernier

(d) extended vernier

Ans-D

10. If two points are already fixed, with respect to them any number of points may be located by

(a) two linear measurements

(b) a linear measurement

(d) any of the above

Ans-d

11. In surveying principle ‘work from whole to part is recommended’since

(a) it is easy to use measurements for plotting

(b) there is no chance of omitting any required measurement

(d) it leads to errorless maps

Ans-C

12. In a survey A and B are two points already located with respect to A and B point C is located by

taking two readings and then line CD is measured, where D is a point on AB. Then line CD is

known as

(a) base line

(b) check line

(d) additional line

Ans-c

13. The headquarters of Survey of India is located at

(a) New Delhi

(b) Mumbai

(d) Dehradun

Ans-D

14. When the length of chain used in measuring distance is shorter than the standard length, the error

in measured length is

(a) positive error

(b) negative error

(d) none of these

Ans-a

15. Marking the end of a chain length is an example of

(a) positive error

(b) negative error

(d) compensating error

Ans-d

16. Pick up the correct feature of accidental error in surveying

(a) positive and negative errors will occur with equal frequency

(b) small errors occur more frequently

(d) all the above

Ans-d

17. Significant figure in the number 0.0044 is

(a) 5

(b) 4

(d) 2

Ans-D

18. To minimize rounding off errors, as per the rule the numbers 28.425 and 28.435 are rounded off as

(a) 28.42, 28.43

(b) 28.43, 28.43

(d) 28.43, 28.44

Ans-c

19. In approximate measurement of a line by pacing, a step length of a normal man is taken as

(a) 0.7 m

(b) 0.75 m

(d) 0.85 m

Ans-c

20. A watch-like instrument carried in the shirt pocket to count the number of steps taken to measure a

line approximately is called

(a) passometer

(b) pedometer

(d) speedometer

Ans-A

21. The instrument which is attached to the wheel of a cycle to record the number of revolutions made

for the purpose of approximate measurement is known as

(a) passometer

(b) pedometer

(d) speedomete

Ans-c

22. In a 20 m chain the brass tally with two teeth indicates the ______ distance from the nearest end

of the chain

(a) 2 m

(b) 4 m

(d) 8 m

Ans-B

23. Metallic tapes are made with

(a) varnished linen

(b) varnished linen with steel wires

(d) invar

Ans-b

24. The line to be measured accurately in a chain survey is

(a) main line

(b) base line

(d) detail line

Ans-B

25. If W is the weight of tape per span length, P is the pull applied, the length L measured with a tape

is to be corrected by

(a)

(b)

(c)

(d)

26. The correction to be applied for length L measured along a sloping ground with angle q to

horizontal is

(a) L(1 – sin q)

(b) L(1 – cos q)

(d) L(1 – cot q)

Ans-b

27. In chain survey, as far as possible main triangles should have angles close to

(a) 40°

(b) 50°

(d) 70°

Ans-c

28. In chain survey a triangle with any angle less than ______ is considered as ill conditioned

triangle

(a) 25°

(b) 30°

(d) 40°

Ans- b

29. Which one of the following is not used in setting perpendicular

(a) line ranges

(b) cross staff

(d) prism square

Ans-A

30. The bearing S 25° W means ______ in whole circle bearing

(a) 155°

(b) 205°

(d) 335°

Ans-b

31. The horizontal angle between the true meridian and magnetic meridian is known as

(a) magnetic dip

(b) declination

(d) magnetic bearing

Ans-b

32. At a place magnetic dip is 15° and declination is 10°E. If the magnetic bearing of a line is 75°, the

true bearing is

(a) 60°

(b) 65°

(d) 90°

Ans-c

33. In whole circle bearing system, the back bearing of N 20 W line is

(a) 160°

(b) 200°

(d) 20°

Ans- A

34. Forebearing of line AB is 60° and that of BC is 130°, then angle B is

(a) 50°

(b) 190°

(d) none of the above

Ans-c

35. Forebearing of line AB is 80°. Included angle B is 100°. Then forebearing of BC is

(a) 160°

(b) 180°

(d) 240°

Ans-A

36. The following bearings were observed while traversing with a compass.

Line FB BB

AB 80° 260°

BC 90° 269°

CD 120° 301

DA 319° 140

Ans-C

Which stations are affected by local attraction?

(a) A and B

(b) B and C

(d) D and A

37. Which one of the following is a wrong statement about plane table surveying

(a) it avoids missing of any measurement required for plotting

(b) it is an accurate method

(d) it is commonly used for filling details in small or medium scale mapping

Ans-b

38. Which one of the following is not an accessary of plane table?

(a) Plumbing fork

(b) Trough compass

(d) Prismatic compass

Ans-d

39. Which one of the following is not a method of plane tabling?

(a) Orientation

(b) Radiation

(d) Resection

Ans-A

40. Three-point problem in plane tabling may be solved by

(a) tracing paper method

(b) graphical method

(d) all of the above

Ans-d

41. Trial and error method of solving three-point problems in plane tabling is also known as

(a) tracing paper method

(b) Bessel’s method

(d) all the above

Ans- c

42. Which one of the following is wrong about level surface?

(a) It is a horizontal plane.

(b) It is a surface parallel to mean spheroid of earth.

Ans- a

(d) It is normal to plumb line at all points.

43. In India mean sea level used for fixing reduced levels is at

(a) Goa

(b) Mumbai

(d) Karachi

Ans-d

44. Which one of the following is not a self-reading staff?

(a) Solid staff

(b) Folding staff

(d) Target staff

Ans-D

45. In external focussing telescope for focussing

(a) eyepiece is moved

(b) objective tube is moved

(d) neither eyepiece nor objective piece is moved

Ans-c

46. In levelling height of instrument means

(a) height of telescope from the ground where instrument is set

(b) level of the point with respect to assumed datum

(d) none of the above

Ans-c

47. After setting a level, the first sight to be taken is

(a) foresight

(b) back sight

(d) any of the above

Ans- b

48. The point on which both foresight and back sights are taken is

(a) change point

(b) first station point in the traverse

(d) the point where level is to be set

Ans- A

49. If d is horizontal distance and R is radius of the earth, curvature correction is

(a)

(b)

(c)

(d)

50. Correction for refraction is approximately

(a) curvature correction

(b) curvature correction

(d) curvature correction

Ans- D

51. By balancing back sight and foresight the errors eliminated are

(a) errors due to non-parallelism of line of collimation and axis of bubble tube

(b) error due to curvature and refraction

(d) none of (a) and (b)

Ans- C

52. Sensitivity of a bubble tube can be increased by

(a) increasing the length of the tube

(b) increasing the diameter of the tube

(d) any of the above

Ans- D

53. The rise and fall method of levelling provides a complete check on

(a) back sight

(b) foresight

(d) all of the above

Ans-d

54. The reading taken from an instrument station on a bench mark of 100.00 RL is 1.2 and the reading

taken on next station is 1.70. Then RLof next station is

(a) 98.8 m

(b) 98.30 m

(d) 100.50 m

Ans-c

55. The reading taken from an instrument station on a benchmark of RL 100.00 is 1.4 and on a chejja

reading taken with inverted staff is 2.8 m. Then RLof chejja is

(a) 104.2 m

(b) 101.40 m

(d) none of the above

Ans-A

56. If height of sight is h metres above mean sea level, then the distance d of visible horizon is

(a)

(b)

(c)

(d)

57. Contour interval selected is

(a) directly proportional to flatness of ground

(b) larger if the purpose of contouring is for earthwork calculation

(d) directly proportional to time and fund available.

Ans-c

58. Direct method of contouring is suitable for

(a) small areas

(b) large areas

(d) hilly areas

Ans-A

59. Method of square is suitable for contouring

(a) hilly terrain

(b) forest

(d) plains

Ans- D

60. Pick up the correct statement given below:

In cross-section method of contouring

(a) spacing of cross section depends upon the nature of ground

(b) cross sections need not be always at 90° to main line

(d) all the above

Ans- D

61. For hilly region the ideal method of contouring is

(a) direct method

(b) method of squares

(d) radial line method

Ans-D

62. For the purpose of linear interpolation of contour one can use

(a) estimation

(b) arithmetic calculations

(d) all the above

Ans-D

63. Contour maps are useful for

(a) determining intervisibility between two points

(b) determining catchment area

(d) all the above

Ans- d

64. An imaginary line joining the point of intersection of the cross-hairs of the diaphragm and the

optical centre of the object glass is known as

(a) axis of telescope

(b) axis of level tube

(d) horizontal axis

Ans- c

65. The process of turning the telescope through 180° in vertical plane is known as

(a) transiting

(b) plunging

(d) any one of the above

Ans- A

66. The process of rotating the telescope of a theodolite in a horizontal plane is known as

(a) transiting

(b) plunging

(d) any of the above

Ans-c

67. A theodolite is considered to be in proper condition, if

(a) the axis of the plate is perpendicular to the vertical axis

(b) the trunnion axis is perpendicular to the vertical axis

(d) all the above

Ans- D

68. If the least count of instrument is 20″ , by measuring the horizontal angle n times repeatedly, the

accuracy achieved is

(a)

(b)

(d) none of the above

Ans-b

69. By method of repetition in measuring horizontal angle the error that is not eliminated is

(a) due to inaccurate graduation

(b) due to the line of sight and trunnion axis being out of adjustment

(d) due to non-verticality of vertical signal

Ans-d

70. Trigonometric levelling is used when

(a) base of the object is accessible

(b) base of the object is not accessible

(d) in none of the above two case

Ans- b

71. If the base of the object is inaccessible, in trigonometric levelling method to be used is

(a) single plane method

(b) double plane method

(d) none of (a) and (b)

Ans- b

72. Two-peg test is conducted to check the following permanent adjustment of dumpy level

(a) axis of bubble tube is perpendicular to the vertical axis

(b) horizontal cross-hair lie in a plane perpendicular to the vertical axis

(d) all the above

Ans- c

73. Spire test is to check the following permanent adjustment of theodolite

(a) plate level axis is perpendicular to vertical axis

(b) horizontal axis is perpendicular to vertical axis

(d) the axis of altitude level is parallel to the line of sight

Ans- B

74. If a, b, c are the sides of a triangle and s = , the area of the triangle is

(a) A = s(s – a) (s – b) (s – c)

(b) A =

(d) A = s(s + a) (s + b) (s + c)

Ans- b

75. According to Simpson’s rule, if there are n number of segments each of width d, in terns of

ordinates area of the figure is

(a) A = [(O1 + On

) + 4(O2 + O4 + … + On – 1

) + 2(O3 + O5 + … + On – 2

)]

(b) A = [(O1 + On

) + 3(O2 + O4 + … + On – 1

) + 2(O3 + O5 + … + On – 2

)]

) + 2(O3 + O5 + … + On

)]

(d) A = [O1 + 2(O2 + O4 + … + On – 1

) + 3(O3 + O5 + … + On

)]

Ans-A

76. To apply Simpson’s rule for computation of irregular area, number of segments should be

(a) of equal width and odd number

(b) of equal width and even number

(d) may be even or odd

Ans-b

77. If offsets are taken at irregular interval to a boundary from a line the area may be calculated from

the equation

(a) A =

(b) A =

(d) A =

Ans- A

78. If coordinates of stations A, B, C and D are (x1

, y1

), (x2

, y2

), (x3

, y3

) and (x4

, y4

) respectively, the

area of ABCD is

(a) A = [y1

(x4 – x2

) + y2

(x1 – x3

) + y3

(x2 – x4

) + y4

(x3 – x1

)]

(b) A = [y1

(x1 – x2

) + y2

(x2 – x3

) + y3

(x3 – x4

) + y4

(x4 – x1

)]

(x2 – x3

) + y2

(x3 – x4

) + y3

(x4 – x1

) + y4

(x3 – x2

)]

(d) none of the above

Ans-A

79. Which one of the following methods is superior in finding area of map?

(a) Give and take rule.

(b) Subdivision into squares.

(d) Using a planimeter.

Ans- d

80. Which one of the following methods estimates best the area of an irregular curved boundary?

(a) Midordinate method

(b) Average ordinate method

(d) Simpson’s method

Ans-d

81. While measuring the area of a plan using a planimeter the following readings were taken. If the

anchor point was outside the plan and zero mark of disc crossed the index in clockwise direction,

the area of map is ______.

Given Multiplying constant = 100 cm2

Initial reading = 8.378

Final reading = 1.436

(a) 2694.2 cm2

(b) 1305.8 cm2

(d) none of the above.

Ans-b

82. If L is length of tracing arm, a is the distance of wheel from hinge and R is length of anchor arm,

the radius of zero circle of the planimeter is equal to

(a) zero

(b)

(c)

(d)

83. If A1

, A2 … An are the cross-sectional area of a canal at distances d, 2d,…, then volume of

earthwork involved in making the canal as per trapezoidal rule is

(a) d[A1 + A2 + … + An

]

(b)

(c)

(d)

84. According to prismoidal rule, the volume of earthwork in terms of cross-sectional area A1

, A2 …

taken at distances d is

(a)

(b)

(c)

(d)

85. If the depth of excavation of block A at corners a, b, c and d is ha

, hb

, hc and hd

, the volume of pit

(a)

(b)

(c)

(d)

86. The instrument used for reducing a plan is known as

(a) clinometer

(b) planimeter

(d) sextant

Ans-c

87. The minor instrument used not only to take horizontal sights but also inclined sights are known as

(a) clinometer

(b) sextant

(d) planimeter

Ans-a

88. Minor instruments, which make use of optical principle to measure an angle in a single

observations is known as

(a) clinometer

(b) sextant

(d) pantograph

Ans-b

89. If f is focal length, i is stadia hair interval and d is the distance between the optical centre of the

object lense, the multiplying constant is

(a)

(b) f + d

(c)

(d) f + id

90. In Question 89, the additive constant is

(a)

(b) f + d

(c)

(d) f + id

91. In a theodolite the multiplying constant for tacheometry is usually

(a) 10

(b) 50

(d) 200

Ans-c

92. In a tacheometry, if intercept taken on a vertically held staff is inclined at q to horizontal, the

horizontal distance is

(a) kS + C

(b) kS cos q + C cos q

2 q + C cos q

(d) kS sin 2q + C sin q

Ans-c

93. In Question 92, vertical distance is

(a) kS + C

(b) kS cos q + C cos q

2 q + C cos q

(d) kS sin 2q + C sin q

Ans-d

94. In the tachemetry, if inclined sight q is taken on a staff held normal to the sight, horizontal distance

(a) (kS + C) cos q + r sin q

(b) (kS + C) sin q

2 q

(d) (kS + C) tan q

Ans-a

95. In Question No. 94, the expression for vertical distance is

(a) (kS + C) cos q + r sin q

(b) (kS + C) sin q

2 q

(d) (kS + C) tan q

Ans-b

96. In external focussing telescope with an anallatic lens, for tacheometric survey additive constant is

(a) zero

(b) 0.1 m

(d) 0.5 m

Ans-A

97. If the focal length of the object glass is 30 cm and the distance form the object glass to the

trunnion axis is 20 cm, the additive constant for telemetry is

(a) 0.5

(b) 0.4

(d) 0.1

Ans- A

98. In the substance bar method of tacheometry, the substance bar is held

(a) vertical

(b) horizontal

(d) any of the above

Ans-B

99. The tangent, which is before the commencement of a curve is called

(a) back tangent

(b) rear tangent

(d) all of the above

Ans- D

100. If the degree of curve is 1, then radius of the curve is

(a)

(b)

(c)

(d)

101 The tangent length of a simple curve of radius R and deflection angle D is

(a) R sin

(b) R cos

(d) R cot

Ans- C

102. The length of long chord of a circular curve of radius R and deflection angle D is

(a) R sin

(b) 2R sin

(d) 2R cos

Ans- b

103. Mid-ordinate of a simple curve of radius R and deflection angle D is

(a)

(b)

(c)

(d)

104. If point of curve is 521.4 m in setting circular curve with 20 m chain, the first point where peg is

to be fixed on the curve is

(a) 540 m

(b) 541.4 m

(d) 551.4 m

Ans- A

105. In linear method of setting out simple circular curves the method to be used is

(a) offset from long chord

(b) successive bisection of chord

(d) any one of the above

Ans- D

106. The radial offset at a distance x from the point of curve in a simple circular curve is

(a)

(b)

(c)

(d)

107. The perpendicular offset at a distance x from the point of curve in a simple curve is

(a)

(b)

(c)

(d)

108. If obstacles are coming in the alignment of a simple circular curve use

(a) transition curve

(b) compound curve

(d) any one of the above

Ans- B

109. As far as possible reverse curves should be avoided. Reason for it is

(a) puts passengers to discomfort

(b) needs cambers on opposite edges

(d) all the above

Ans- D

110. In a reverse curve, the super elevation provided at the point of reverse curvature is

(a) minimum

(b) zero

Ans- B

(d) depends upon the elements of curve

111. If R is radius of curvature and l is the distance from the beginning in a transition curve, then for

ideal transition

(a) l µ R

(b) l µ R

(c)

(d)

112. Which one of the following is not a transition curve?

(a) Cubic spiral

(b) Cubic parabola

(d) Sag curve

Ans- D

113. If the vertical curve connects a 1% upgrade with 1.4% downgrade, and the rate of change of

grade is to be 0.06% per 20 m stations, the length of vertical curve is

(a) 133.3 m

(b) 40 m

(d) 800 m

Ans- D

114. In a sag curve a minimum of stoppage distance is determined with assumptions of head light

______ and beam tilted at an upward angle of ______

(a) 1.0 m and 2°

(b) 0.75 m and 2°

(d) 0.75 m and 1°

Ans- D

115. If D is deflection angle, the chord length of a circular curve is

(a) R sin D

(b) R cos D

(c)

(d)

116. Two theodolite method of setting out a curve involves

(a) linear measurements only

(b) angular measurements only

(d) none of the above

Ans-B

117. The necessary super elevation on railway is

(a)

(b)

(c)

(d)

118. If k is the total distance of the level lime in km, the permissible error in the first order precise

levelling is

(a)

(b) ± 4 k mm

(c)

(d) ± 8 k mm

Ans- A

119. Electromagnetic distance measurements instruments are

(a) microwave instruments

(b) infrared instruments

(d) any of the above

Ans- D

120. Total station is

(a) electronic theodolite

(b) electronic distance meter

(d) integration of all the above

Ans- D

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Civil engineering survey objective question and answer

Civil engineering survey objective question and answer

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