산림기사 2025년 1회 2차 필답기출문제 해설 - 임투수 산림기사 , 필답형 기출문제 해설, 필답문제해설

Forestry Engineer Exam 2025, 1st Written Exam, Past Questions and Answers - 1st Exam, 2nd Test, Written Exam, Past Questions and Answers Question 1) Write and explain the four types of tree size. Dimension = Stands with a crown occupancy ratio of 50% or more for trees less than 6 cm in diameter at breast height. Small-diameter trees = Stands with a crown occupancy ratio of 6-16 cm in diameter at breast height. Medium-diameter trees = Stands with a crown occupancy ratio of 18-28 cm in diameter at breast height. Large-diameter trees = Stands with a crown occupancy ratio of 50% or more for trees greater than 30 cm in diameter at breast height. Question 2) Given a forest area of ​​100 ha, a total forest road length of 2 km, and a forest road efficiency of 10, calculate the forest road density and average tree cover distance. Road density? 2,000/100 = 20. Average tree cover distance? 10/20 = 0.5 km Question 3) List four limitations of multi-process forestry machinery (pelle bunchers, harvesters). Because they are highly affected by terrain, they must be installed on equipment with good maneuverability. Steep slopes are restricted and can only be operated on uniform forest land. Speedless repairs are difficult in the event of a breakdown, requiring skilled workers. Because they are expensive, careful planning is essential for economical operation. Question 4) The actual forest stock is 450 m^3 per ha, while the legal stock according to harvest tables is 350 m^3 per ha. If the legal harvest rate for this forest is 7 m^3 per ha, calculate the standard harvest rate using the Hundeshagen method. Describe two types of cross-cutting methods. Hundes = 450 x (7/350) = 9 m^3 Crossroads Kalguksu restaurant = Crossroads law = Crossroads law Crossroads law = Camera taxation method, Karl method, Heyer method Question 5) If the forest land was worth 200,000 won 20 years ago, annual improvements cost 30,000 won, management costs 15,000 won, future thinning profits are 170,000 won, and the interest rate is 5%, what is the forest land cost? (1.05^20 = 2.6532) Forest land cost? The present value of the net cost of assessing the forest land to a suitable condition for afforestation and other forest management after acquisition is the sum of the following: Forest land cost = 200,000"(1.05^20)+[〖(30,000+15,000)(1.05)^20−1)]/0.05]−170,000 = 530,640+1,487,880-170,000=1,848,520 won Question 6) Describe the four types of logging ages. Afforestation logging age Artisan logging age Maximum monetary profit logging age Maximum net land profit logging age Question 7) Write and explain the formula for calculating average flow velocity using the Chezy and Manning formulas. Question 8) Describe the methods for evaluating forests in ghost forests, medium-aged forests, under-logged forests, and over-logged forests. Ghost Forest Cost Method: The cumulative actual cost is used as the valuation (average of purchase costs). Cost Value Method: The post-tax sum of the net costs incurred in growing the tree up to the mth year of its life. Medium-aged forests: The Glaser method, a method intermediate between the cost value method and the estimated value method, is used. Long-aged forests below the cut-off point. Estimated estimated value method: Used to value trees close to the cut-off point. Income Capitalization Method (selected cut-off). Above the cut-off point. Valuation is based on the market value method. Question 9) Calculate the soil volume of the land parceled as follows: [(0.3+1+1)/3]*10=7.6 [(1+1.5+1)/3]*10=11.6 [(1+1+1)/3]*10=10 [(1+1+1)/3]*10=10 [(1.5+1+1.3)/3]*10=12.6 [(1.5+1+1.3)/3]*10=12.6 [(1.5+1+2)/3]*10=15 [(1+1+2)/3]*10=13.3 [(1+2+0.5)/3]*10=11.6 Total of 9 blocks = 104m^3 Question 10) If the volume of a 30-year-old pine tree is 80m^3 and 100m^3 at 35 years old, then the Pressler formula What is the growth rate? Question 11) Write and explain four prerequisites for a linear programming model. Question 12) Write four purposes for line segmentation. Question 13) Describe the advantages and disadvantages of forest road construction. Question 14) Calculate the minimum curve radius for a forest road with a design speed of 40 km/hr and a slope of 6%. (Friction coefficient: 0.15) Question 15) Define the slope lattice frame method and provide two materials. #ForestEngineer #ForestEngineerStudy #ForestEngineerWrittenTest #ForestEngineerPracticalTest #ForestEngineer1stTest #ForestEngineer2ndTest #ForestEngineerStudyMethod #ForestEngineerOutlook #ForestEngineerEasyMemorization #ForestEngineerMemorizationTechniques #ForestEngineerBasics