25. Draftman Grade I Department Kerala Port

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100 questions
• Q1
The general method of determining the distance of boundaries during reconnaissance survey
Tachcometry
Direct method
Speedometer
Pacing
30s
• Q2
The Bowditch rule is based on the assumption that probable error of closure of a traverse is proportional to : Where l is the length of the line ?
√ l
1√ l
l2
3√ l
30s
• Q3
The methods of plane surveying can be done for an area, not more than:
500 Sqkm
5000 Sqkm
250 Sqkm
1000 Sqkm
30s
• Q4
Which one of the following scales is the smallest
1 cm = 1 km
Imm= 1 m
1:20000
RF = 1/2000
30s
• Q5
The coefficient of linear expansion of invar as compared to that of ordinary steel is about
1/3000
1/30000
1/300
1/30
30s
• Q6
30s
• Q7
30s
• Q8
The term height of instrument (HI) in leveling is
Elevation of line of sight with respect to a datum
Elevation of line of sight with respect to MSI
Elevation of the instrument axis above the staff station
Height of instrument axis above the station point
30s
• Q9
While levelling a steep slope, it is preferable to setup the instrument successively along
Straight line
Zig-Zig line
Curved line
Diagonal line
30s
• Q10
The contour interval is :
Small on hilly area
Directly proportional to the scale of map
Greater on flat ground
Inversely proportional to the scale of map
30s
• Q11
In a vernier theodolite having least count 20”, the value of vernier scale division is
1/60 x 20"
59/60 x 20"
59/ 60 x 20"
59/60 x 20"
30s
• Q12
To measure a vertical angle of an object
Vernier C should set zero
No need of set zero in the vernier
Both verniers C and D should set zero
Vernier D should set Zero
30s
• Q13
The some of the interior angle of a closed traverse is , where ‘N’ is the number of angles,
(2N-4) x 180°
(N-2) x 180°
(2N +4 ) x 180°
(N + 2 ) x 180°
30s
• Q14
The method of tachnometry is generally done by
Movable hair system
Subtense bar system
None of the above
fixed hair system
30s
• Q15
30s

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