Answer: 0.4

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Questions

81
If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is

Answer: 0.4

82
For a tacheometer the additive and multi-plying constants are respectively

Answer: 0 and 100

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83
If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is

Answer: 75 m

85
Horizontal distances obtained by thermometric observations

Answer: do not require slope and tension corrections

86
Subtense bar is an instrument used for

Answer: measurement of horizontal distances in undulated areas

87
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations ?

Answer: measuring angles to the point from at least two stations

88
Transit rule of adjusting the consecutive coordinates of a traverse is used where

Answer: angular measurements are more accurate than linear measurements

89
The angle between the prolongation of the preceding line and the forward line of a traverse is called

Answer: deflection angle

90
If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be

Answer: +86.6 m, -50 m

91
If in a closed traverse, the sum of the north latitudes is more than the sum of the south latitudes and also the sum of west departures is more than the sum of the east departures, the bearing of the closing line is in the

Answer: SE quadrant

92
Bowditch rule is applied to

Answer: a closed traverse for adjustment of closing error

93
After fixing the plane table to the tripod, the main operations which are needed at each plane table station are

i) levelling

ii) orientation

iii) centering

The correct sequence of these operations isAnswer: (i), (iii), (ii)

94
The methods used for locating the plane table stations are

i) radiation

ii) traversing

iii) intersection

iv) resection

The correct answer isAnswer: (ii) and (iv)

95
The resection by two point problem as compared to three point problem

Answer: requires more labour

96
The two point problem and three point problem are methods of

Answer: resection and orientation

97
Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ?

Answer: intersection

98
The instrument used for accurate centering in plane table survey is

Answer: plumbing fork

99
The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called

Answer: resection