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 papersDrying timber without defects and protecting it from decay, insects and fire, by chemical, biological and modified-wood methods.
In the exams: ICAR AIEEA-PG Group 09 (biological and chemical wood preservation); ICAR AICE-JRF 59 Unit 7 (wood seasoning and preservation techniques); IFoS Forestry Paper II Section B
How our questions for Range Forest Officer recruitment spread across the units of Wood Seasoning, Preservation & Protection. Difficulty: 17 easy, 17 medium, 0 hard.
| Air seasoning | 3 | |
| Kiln seasoning: kiln types and schedules | 3 | |
| Seasoning defects and their control | 3 | |
| Solar and other low-cost seasoning | 3 | |
| Preservatives: oil-type, water-borne, organic solvent | 3 | |
| Treatment methods: non-pressure and pressure (full-cell, empty-cell) | 3 | |
| Sap-displacement and diffusion methods | 3 | |
| Retention, penetration and treatment standards | 3 | |
| Fire retardants | 3 | |
| Safety and environmental rules on preservatives | 3 | |
| Wood-destroying agents: fungi, insects, marine borers | 2 | |
| Biological and environmentally safer preservation; modified wood | 2 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
Air seasoning cannot reduce moisture content below:
B. The outdoor equilibrium moisture content
Wood comes to equilibrium with outdoor air, often about 12–18% in India.
The most common type of timber kiln is the:
C. Compartment or batch kiln
A whole charge is loaded and dried through a schedule.
Casehardening is a condition in which:
B. The shell is in compression and the core in tension
The surface set while the interior was wet.
Teak was traditionally girdled before felling mainly to:
D. Dry the stem partly and let logs float
Girdling two to three years before felling reduced weight and seasoning time.
Decay fungi cannot attack wood that is:
A. Below about 20% moisture
Decay needs moisture near or above FSP.
The full-cell process is also called the:
B. Bethell process
Rueping and Lowry are empty-cell processes.
Incising timber before treatment:
C. Opens pathways for deeper penetration
Small cuts expose more end-grain entry points in refractory wood.
Why must the Boucherie process be applied soon after felling?
A. Air soon blocks the cells
Fresh sapwood is continuous and water-filled.
Groundline bandages on poles already in service are used to:
B. Extend service life
They deliver preservative where decay risk is highest.
Retention of preservative is expressed as:
A. kg per m³ of wood
Penetration is depth; retention is amount per volume.
Ten here, 34 in the app. The Laisha app has every practice question we have written to Range Forest Officer recruitment in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.
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