Range Forest Officer recruitment (state exams) · India · State Public Service Commissions and state forest departments (e.g. MPPSC, UKPSC, UPPSC)
Original practice questions written to the published syllabus · not past papersMeasuring and mapping forest land: chain, compass and plane-table survey, levelling and contouring, area computation, GNSS and the reading of topographic maps. General surveying is covered in the Agricultural Engineering track (surveying-levelling); this subject applies it to forest boundaries and compartments.
In the exams: IFoS Forestry Paper II Section A (surveying and forest engineering); PRC Forest Engineering and Utilization (survey); state Range Forest Officer exams
How our questions for Range Forest Officer recruitment spread across the units of Forest Surveying & Mapping. Difficulty: 18 easy, 6 medium, 0 hard.
| Chain and tape survey | 4 | |
| Levelling and contouring | 4 | |
| Computation of areas and volumes | 4 | |
| Compass survey: bearings, declination, closing error | 3 | |
| Plane-table survey | 3 | |
| Topographic maps and map reading | 3 | |
| Demarcation of forest boundaries and compartments | 2 | |
| National mapping agencies and systems | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
Which error accumulates over a long taped line rather than tending to cancel?
C. Using a tape of incorrect length
Systematic (cumulative) errors such as wrong tape length build up with distance; random errors tend to compensate.
Further reading: See the manual sources: Punmia et al.; Bannister et al.; Ghilani and Wolf; Iliffe and Lott; NSSDA 1998
Which simple hand instrument is used in forests to measure slope angles for road gradients?
D. Abney level
The Abney level (or a clinometer) gives slope angles or percentages.
Further reading: See the manual sources: Punmia et al.; Bannister et al.; Ghilani and Wolf; Iliffe and Lott; NSSDA 1998
On a 1:50,000 map, what ground area does 1 cm² represent?
A. 25 ha
1 cm = 500 m; 500 × 500 = 250,000 m² = 25 ha. Multiplying by the scale only is a common error.
Further reading: See the manual sources: Punmia et al.; Bannister et al.; Ghilani and Wolf; Iliffe and Lott; NSSDA 1998
At a scale of 1:25,000, how much ground distance does 4 cm on the map represent?
A. 1 km
4 cm × 25,000 = 100,000 cm = 1 km.
Further reading: See the manual sources: Punmia et al.; Bannister et al.; Ghilani and Wolf; Iliffe and Lott; NSSDA 1998
On most topographic maps, brown lines usually show:
C. Contours
Brown commonly shows relief; blue water; black or red cultural features.
Further reading: See the manual sources: Punmia et al.; Bannister et al.; Ghilani and Wolf; Iliffe and Lott; NSSDA 1998
A permanent point of known elevation used as reference for levelling is a:
C. Bench mark
Bench marks carry reduced levels relative to the national height datum.
Further reading: See the manual sources: Punmia et al.; Bannister et al.; Ghilani and Wolf; Iliffe and Lott; NSSDA 1998
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