Forest Mensuration and Biometrics MCQs 2026

Biometric growth models help foresters to

1. Aeliminate all fieldwork forever without data✓
2. Bpredict future stand development under treatments✓
3. Creplace species ecology entirely✓
4. Dignore site quality✓

Growing stock assessment is essential for

1. Aonly nursery polybag color choice✓
2. Bmanagement planning and sustained yield regulation✓
3. Conly painting boundary rocks✓
4. Donly writing novels✓

Diameter tape is graduated so that

1. Aheight reads as volume✓
2. Bage reads as BA✓
3. Cgirth measurement reads directly as diameter✓
4. Dvolume reads as rainfall✓

Calipers measure

1. Aonly height✓
2. Btree diameter directly across the stem✓
3. Conly age✓
4. Donly volume without diameter✓

A hypsometer based on similar triangles uses

1. Aonly tree weight✓
2. Bonly bark color✓
3. Cangles to tip and base plus horizontal distance✓
4. Donly seed count✓

Taper describes

1. Aonly leaf tapering✓
2. Bonly root hair length✓
3. Chow stem diameter decreases with height✓
4. Donly road gradient✓

Top height or dominant height is often

1. Amean height of the largest trees used for site index✓
2. Bheight of the smallest seedling✓
3. Caverage of all weeds✓
4. Dheight of the understory only✓

Volume per hectare is a key expression of

1. Aonly rainfall intensity✓
2. Bonly wind speed✓
3. Conly staff density✓
4. Dstand growing stock density✓

The unit hectare equals

1. A100 square meters✓
2. B1 square meter✓
3. C1,000,000 square kilometers✓
4. D10,000 square meters✓

Outliers in diameter data should be

1. Aalways deleted without inspection✓
2. Balways doubled✓
3. Cchecked for measurement error before inclusion✓
4. Dignored as impossible forever without checks✓

Stratification in inventory means

1. Amixing all types randomly without plan✓
2. Bavoiding maps✓
3. Cmeasuring only one tree✓
4. Ddividing the forest into more homogeneous parts before sampling✓

Sampling inventory is preferred for large forests because it

1. Aestimates parameters with known precision at lower cost✓
2. Balways has zero error✓
3. Cignores all statistics✓
4. Dmeasures nothing✓

A full enumeration measures

1. Aonly every 100th province✓
2. Ball trees in the area of interest✓
3. Conly nursery weeds✓
4. Donly boundary pillars✓

Forest biometrics applies

1. Aonly taxonomy of insects✓
2. Bstatistical methods to forest measurement and inventory✓
3. Conly nursery poetry✓
4. Donly road engineering✓

Allometric equations predict

1. Apolitical elections✓
2. Bbiomass or volume from easier measures like DBH✓
3. Crainfall tomorrow exactly✓
4. Dseed market fashion✓

Spacing of trees can be roughly related to

1. Anumber of stems per hectare✓
2. Bonly leaf nitrogen✓
3. Conly bark pH✓
4. Donly auction lot number✓

Canopy density or crown cover estimates

1. Aonly stem DBH✓
2. Bproportion of ground covered by crowns✓
3. Conly root biomass✓
4. Donly soil N✓

Stock table presents

1. Avolume (or basal area) by diameter classes✓
2. Bonly staff roster✓
3. Conly nursery catalogue✓
4. Donly law sections✓

Stand table presents

1. Aonly species list without sizes✓
2. Bonly prices✓
3. Cnumber of trees by diameter classes✓
4. Donly rainfall✓

Pressler's borer (increment borer) is used to

1. Aextract cores for ring counts and growth study✓
2. Bfell the entire tree always✓
3. Cmeasure only plot area✓
4. Dweigh logs only✓

Tree age of temperate conifers can be estimated by

1. Acounting annual rings✓
2. Bcounting leaves only✓
3. Cweighing bark only✓
4. Dmeasuring only crown color✓

Bark allowance is considered when

1. Abark is never present✓
2. Bvolume is only leaf litter✓
3. Cunder-bark volume is required from over-bark measurements✓
4. Dmeasuring only soil✓

Stack volume of fuelwood differs from solid volume because

1. Astacks have no voids ever✓
2. Bair spaces exist between pieces in a stack✓
3. Csolid volume is always larger by law of voids zero✓
4. Dfuelwood has no volume✓

Hoppus system historically measured

1. Aonly leaf area✓
2. Btimber volume using a quarter-girth type rule in British India tradition✓
3. Conly rainfall✓
4. Donly wildlife density✓

Log volume may be estimated by formulas such as

1. ASmalian, Huber or Newton formulas using end diameters and length✓
2. Bonly counting growth rings of standing trees✓
3. Conly weighing leaves✓
4. Donly DBH without length✓

Accuracy is

1. Aonly the number of decimal places printed✓
2. Bonly instrument brand prestige✓
3. Conly sample size without design✓
4. Dcloseness of an estimate to the true value✓

Precision refers to

1. Acloseness to true value only (accuracy)✓
2. Brepeatability / closeness of repeated measurements✓
3. Cpolitical correctness✓
4. Dseed purity only✓

Bias in measurement means

1. Apurely random scatter around truth✓
2. Bperfect accuracy✓
3. Czero error always✓
4. Dsystematic error in one direction✓

Point sampling (prism cruising) estimates basal area using

1. Aonly weighing logs✓
2. Bonly counting seedlings✓
3. Conly soil pH✓
4. Dangle gauge counts of trees appearing larger than a critical angle✓

Fixed area plots have

1. Aradius that changes with every tree DBH✓
2. Bzero area✓
3. Cconstant plot size such as 0.1 ha circles or squares✓
4. Dinfinite area✓

A sample plot in forest inventory is

1. Athe entire country always measured tree by tree✓
2. Bonly a nursery bed✓
3. Ca measured area used to estimate stand parameters✓
4. Donly a timber depot✓

Site quality or site index reflects

1. Aonly distance to market✓
2. Bonly number of forest guards✓
3. Cproductive capacity of a site for a species✓
4. Donly road length✓

Culmination of MAI is important because

1. Ait ends all growth forever✓
2. Bit indicates a volume-oriented technical rotation age✓
3. Cit bans thinning✓
4. Dit measures only seed years✓

MAI means

1. Amean annual increment✓
2. Bmaximum allowable insecticide✓
3. Cmangrove area index✓
4. Dmechanical axe inventory✓

CAI means

1. Acanal afforestation index✓
2. Bcurrent annual increment✓
3. Ccrown area integer✓
4. Dcoupe allocation invoice✓

Increment is

1. Aonly mortality✓
2. Bonly harvest removals✓
3. Cgrowth in diameter, height, basal area or volume over time✓
4. Donly rainfall✓

Crop diameter often means

1. Aonly nursery collar diameter✓
2. Bonly seed diameter✓
3. Conly fruit diameter✓
4. Dmean diameter of the stand (commonly quadratic or arithmetic as defined)✓

Quadratic mean diameter relates to

1. Aarithmetic mean height only✓
2. Bsoil particle diameter✓
3. Cdiameter of the tree of average basal area✓
4. Drainfall drop size✓

Stand basal area is commonly expressed per

1. Ahectare✓
2. Bsecond✓
3. Cmilliliter✓
4. Dcandela✓

Basal area of a tree is

1. Athe leaf area index only✓
2. Bthe root surface only✓
3. Cthe crown projection only✓
4. Dthe cross-sectional area at breast height✓

General volume tables typically use

1. Aonly leaf color✓
2. Bonly bark taste✓
3. Conly GPS brand✓
4. DDBH and height (and sometimes form)✓

Local volume tables are usually based on

1. ADBH alone for a limited area/species✓
2. Bsatellite rainfall only✓
3. Csoil color only✓
4. Dpolitical boundaries only✓

A volume table gives

1. Aestimated volume from measurable tree variables such as DBH and height✓
2. Bonly timber market prices✓
3. Conly species lists without numbers✓
4. Donly nursery yields✓

Form factor is

1. Aalways equal to 1 for all trees✓
2. Bsoil bulk density✓
3. Crainfall form✓
4. Dthe ratio of tree volume to the volume of a cylinder with same DBH and height✓

Merchantable height is

1. Athe usable length of stem for products up to a specified top diameter✓
2. Btotal height including unusable tip always✓
3. Conly stump height✓
4. Donly root depth✓

Tree height can be measured using

1. Aonly weighing the tree✓
2. Bhypsometers, clinometers or geometric methods✓
3. Conly counting leaves✓
4. Donly tasting the bark✓

Girth at breast height relates to diameter by

1. Adiameter = girth / Ï€ (for circular cross-section)✓
2. Bdiameter = girth × Ï€✓
3. Cdiameter = girth²✓
4. Dgirth = diameter / 100 always✓

In many countries including Pakistan practice influenced by British tradition, breast height is commonly

1. A10 m above ground✓
2. Bground level only✓
3. Cthe tip of the leader✓
4. D1.37 m (4.5 ft) above ground✓

DBH means

1. Adepth below hydrology✓
2. Bdaily browse height✓
3. Cdiameter at breast height✓
4. Ddepot billing hours✓

Forest mensuration deals with

1. Aonly wildlife behavior✓
2. Bonly nursery accounting✓
3. Conly forest law cases✓
4. Dmeasurement of trees, stands and forest products✓