Civil engineer objective questions – Survey (Section-3)

51. The permissible limits of error in chaining for measurement on rough or hilly ground is

a) 1:2000

b) 1:1000

c) 1:500

d) 1:250

52. During chaining along a straight line, the leader of the survey party has three arrows and while the follower has five arrows. The distance of the follower from the starting point will be

a) three chains

b) four chains

c) five chains

d) none of the above

53. Invar tapes are made of an alloy of

a) nickel and steel

b) copper and steel

c) tin and steel

d) aluminum and steel

54. Metallic tapes are made of

a) steel

b) invar

c) cloth and wires

d) nickel

55. Chain surveying is used for

a) small areas in open ground

b) small areas with crowded details

c) small areas with simple details

d) large areas with simple details

56. For accurate work, in comparison to chain, the steel band is used because it

a) is light in weight

b) is easy to handle

c) is practically inextensible

d) all of the above

57. The length of an Engineer’s chain is

a) 70 ft

b) 80 ft

c) 90 ft

d) 100 ft

58. It is more difficult to obtain good results while measuring horizontal distance by stepping

a) up-hill

b) down hill

c) in low undulations

d) in plain areas

59. While measuring horizontal distance by stepping method we should follow

a) down hill

b) up hill

c) center

d) all of the above

60. If W is the weight of the chain, L is the span and P is the tension or pull, the sag correction for chain will be

61. If 30 m chain is used to measure on a inclined surface. The measured length is one chain and difference in level between them is D then slope correction is

62. No. of divisions in Gunter chain are

a) 100

b) 150

c) 10

d) all of the above

63. Plumb bob is used for

a) measuring the line

b) transferring the points

c) marking the point

d) all of the above

64. Line ranger is an instrument used for

a) ranging

b) centering

c) transferring

d) measuring

65. Drop arrow is used in

a) conventional chain survey

b) measurements along slopes

c) measurements by methods of stepping

d) measuring with tape

66. Normal tension is that pull which

a) neutralizes the effect due to pull and sag

b) makes sag correction zero

c) makes pull correction zero

d) none of the above

67. If θ is the angle of slope, L is length of slope and H is the difference in elevation between the two ends of the line, then slope correction will be

68. A 30 m long tape was standardized at a temperature 30°C, if at the time of measurement the temperature recorded is 35°C, then the correction for temperature per tape length is (coefficient of thermal expansion =0.0001116/°C)

a) + 0.01674m

b) – 0.001674m

c) + 0.002500m

d) – 0.002500m

69. Chainage is the distance measured

a) along a chain line

b) perpendicular to a chain line

c) perpendicular to a tie line

d) none of the above

70. Limiting length of offset depends upon

a) accuracy desired

b) scale of plotting

c) nature of the ground

d) all of the above

71. The maximum angular error in laying the direction is 3º, if this maximum displacement of the point on paper is same for both sources of error, the accuracy in the offset measurement will be

a) 1 in 18

c) 1 in 25

b) 1 in 19

d) 1 in 30

72. The angle that can be set by French cross staff is

a) 450

b) 90°

c) 45° or 90°

d) none of the above

73. The method of offset laying involving minimum measurement

on the ground is

a) perpendicular offset method

b) oblique offset method

c) tie offset method

d) none of the above

74. The sag correction is always

a) positive

b) negative

c) zero

d) none of the above

75. Open cross staff is used for setting out

a) long offsets

b) short offsets

c) oblique offsets

d) none of the above

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