[2026년 1회] 산림기사 필답 기출문제 정답 복원 & 완벽해설! [임투수]

Solutions and Explanations for the 1st 2026 Forestry Engineer Written Exam Past Questions - Imtusu - 1. Select all correct statements regarding terrace cutting. (Answer: B) A: Applied to areas where unstable soil and rock layers on irregular slopes prevent the implementation of strip sowing or seeding work. B: A foundation construction method that stabilizes and greens the slope by cutting the terraces horizontally after slope trimming and planting vegetation. C: Topsoil is poured into the valley. D: Mitigates the slope of the mountainside to prevent erosion and collapse caused by damming. 2. Calculate the maximum flood flow rate when the area is 3,600 ha, the maximum hourly rainfall is 50 mm/hr, and the runoff coefficient is 0.5. ha = Hourly Rainfall Method CIA/360 = (3,600 * 50 * 0.5) / 360 = 250 2-1) Write down the methods for calculating maximum flood discharge excluding the Hourly Rainfall Method. Types of Maximum Flood Discharge = (Hongbisi-gyop) Flood Trace Method Specific Flow Method Hourly Rainfall Method Rational Formula Method 3) Select all correct types of erosion. A: Rainwater Erosion B: Gravity Erosion C: Coastal Erosion D: Glacial Erosion 3)-1 Select all correct types of soil erosion. A: Trickle erosion B: Sheet erosion (Layered erosion) C: Bend erosion (Right-sided erosion) D: Weathering erosion 4) Select all correct locations for the appropriate installation of transverse drains. (Answers: B, C, D) A: A long section with a steep transverse gradient B: A point of change in the longitudinal slope in the flow direction C: A point where backflow occurs in the side ditch due to a left slope D: The front or back of a structure 5. Select all correct criteria for dividing sub-basins. (Answers: A, B, C) A: The area must be at least 1 ha. Na: Numbers are in a clockwise direction from the downstream of the watershed. Da: Cases where the tree species/forest type/forest type/operation type are different. Da: Cases where the type of operation is different. 6) Select all correct descriptions regarding forest types. (Answer: Ga) A: Classification into natural forests and artificial forests based on the origin of forest formation. B: Coniferous forests, broadleaf forests. Ca: The origin of the forest cannot be determined. Da: The constituent tree species of the forest stand can be identified. 7) Select all correct locations for installing check dams. (B) A: Places without bedrock on both banks. B: Places where the upper part of the dam is wide and the dam section is narrow. Ca: Places with steep slopes. Da: The upstream section of the confluence where two tributaries meet. 8) Select all correct characteristics of cable logging compared to tractor logging. (Answers: A, B, D) A: Less damage to standing trees and timber B: Reduced mobility and low work productivity C: Simple operation and low costs D: Possible to work on low stand density and steep slopes 9) Select all correct characteristics of winter logging compared to summer logging. (Answers: A, B) A: Advantageous for producing hard timber B: Advantageous for minimizing damage from pests and diseases C: Advantageous for peeling and utilizing bark D: Drys easily, making it advantageous for timber collection 10) Select all correct characteristics of mortar stacking and dry stacking. (Answers: A, B, C) A: Wet stone masonry offers high strength and excellent drainage, but is expensive. B: Dry stone masonry involves processing stones to fit them precisely. C: Dry stone masonry is used in cemeteries, traditional buildings, etc. D: Reed stones are used only in dry stone masonry. (Used in all) 11) Calculate the volume of earthwork using the point-elevation method when performing earthwork on the following rectangular land with an area of ​​5 m². Zone A = [(1+2+2+1)/4]*5 = 7.5 Zone B = [(2+1+1+3)/4]*5 = 8.75 Zone C = [(1+2+3+2)/4]*5 = 10 Zone D = [(2+2+2+1)/4]*5 = 8.75 Zone E = [(1+3+2+1)/4]*5 = 8.75 Zone F = [(3+2+1+3)/4]*5 = 11.25 Total 55 m^3 12) Write the appropriate content in the parentheses below. The scale of a plan view is generally ( 1:1,200 ). The vertical axis of a longitudinal section view represents ( distance), and the horizontal axis represents ( altitude or elevation). The scale of the longitudinal section view is horizontal/horizontal (1:1,000), and Vertical. Longitudinal (1:200) The scale of the cross-section is (1:100). 13) Calculate the legal age class area and the number of age classes when the Korean pine forest is 600 ha, the rotation period is 60, and the number of age factors is 10. Legal age class area = (Forest area / Rotation period) x Number of age factors (600/60) x 10 = 100 ha Age class = Forest area / Legal age class area 600/100 = 6 14) Write down the order of preparing forest road design drawings. Preliminary survey - Field survey - Forecast - Measurement - Design drawing preparation - Construction cost calculation (Quantity calculation) - Design A trick que...