RNR 2102 LATEST EXAM TEST 2026/2027 QUESTIONS
AND SOLUTIONS RATED A+
✔✔what do you call instruments that measure tree heights? list all of these instruments
that we cover in this course - ✔✔hypsometers
suunto clinometer
haga altimeter
abney hand level
✔✔how far should you be from a tree in order to measure its height? - ✔✔at least the
tree height
✔✔what are convenient distances for hypsometers with percent scales? - ✔✔100ft
away from the tree
✔✔what are convenient distances for hypsometers with topographic scales? - ✔✔66ft-1
chain
✔✔how would you measure tree height of a leaning tree? - ✔✔measure from 2 or 4 to
get side view of leaning tree
✔✔define Girard from class - ✔✔DIB@17.3'/DBH x 100
✔✔list all the steps involved in measuring girard from class - ✔✔17.3' = 16' log +1'
stump + 0.3' trim allowance
✔✔a ring count reveals 15 rings ( a ring consists of both springwood and summer
wood) how old is the tree? - ✔✔it is 15 plus 3 if pine
15 plus 5 if hardwood
✔✔on a rig, what is dark wood? light wood? - ✔✔dark is summer wood
light is spring/early wood
✔✔what instruments do you need to measure slope percent? list all the steps you need
to take - ✔✔clinometer
1. aim parallel to slope
2. get reading
if you get "n" as reading, then that number is the slope percent
✔✔what is the difference between cruising and scaling? - ✔✔cruising is measuring a
standing tree and scaling is measuring a tree that is already cut
✔✔name all formulas to compute cubic foot volume of a log - ✔✔Huber's
Smalian's
, Newton's
✔✔KNOW PREVIOUS FORMULAS - ✔✔
✔✔name at the following shapes (part of ta tree) - ✔✔cone
cylinder
heiloid
frustum of a heiloid
paraboloid
frustum of a parboiled
✔✔what is the device used to measure volume of an object by submerging it in water? -
✔✔xylometer
✔✔the solid wood content of a cord is 128 cu.ft. true or false? explain - ✔✔false; solid
wood content is 60-95 ft^3/cord
✔✔what is 1 MBF of wood? - ✔✔thousand board feet
✔✔solid wood content of stack of wood increases with stick length - ✔✔false
✔✔solid wood content of a stack of wood increases with average bolt diameter - ✔✔true
✔✔why is weight used now instead of volume in most lumber and paper mills? - ✔✔-
good for irregular solids where volume is difficult to obtain
-for pulpwood, the product is expressed weight
-fast
-encourages delivery of freshly cut wood to the mill
✔✔there are two broad types of log rules
a. ______ log rules: examples is are:
b. ______ log rules: examples is are: - ✔✔a. diagram: scribner log rule
b. mathematical: doyle log rule, international log rule
✔✔doyle log rule results in overruns for ______ logs and underpins for _____ logs.
explain why? - ✔✔overrun for small logs and underrun for large logs
✔✔what is the difference between international 1/4 and international 1/8? -
✔✔international 1/4" modified from international 1/8"
✔✔in doyle long rule contraction the first step was to assume a square cant from the
log. what are the dimensions of the cant? - ✔✔inches
✔✔doyle volue is always lower than international 1/4 - ✔✔true
AND SOLUTIONS RATED A+
✔✔what do you call instruments that measure tree heights? list all of these instruments
that we cover in this course - ✔✔hypsometers
suunto clinometer
haga altimeter
abney hand level
✔✔how far should you be from a tree in order to measure its height? - ✔✔at least the
tree height
✔✔what are convenient distances for hypsometers with percent scales? - ✔✔100ft
away from the tree
✔✔what are convenient distances for hypsometers with topographic scales? - ✔✔66ft-1
chain
✔✔how would you measure tree height of a leaning tree? - ✔✔measure from 2 or 4 to
get side view of leaning tree
✔✔define Girard from class - ✔✔DIB@17.3'/DBH x 100
✔✔list all the steps involved in measuring girard from class - ✔✔17.3' = 16' log +1'
stump + 0.3' trim allowance
✔✔a ring count reveals 15 rings ( a ring consists of both springwood and summer
wood) how old is the tree? - ✔✔it is 15 plus 3 if pine
15 plus 5 if hardwood
✔✔on a rig, what is dark wood? light wood? - ✔✔dark is summer wood
light is spring/early wood
✔✔what instruments do you need to measure slope percent? list all the steps you need
to take - ✔✔clinometer
1. aim parallel to slope
2. get reading
if you get "n" as reading, then that number is the slope percent
✔✔what is the difference between cruising and scaling? - ✔✔cruising is measuring a
standing tree and scaling is measuring a tree that is already cut
✔✔name all formulas to compute cubic foot volume of a log - ✔✔Huber's
Smalian's
, Newton's
✔✔KNOW PREVIOUS FORMULAS - ✔✔
✔✔name at the following shapes (part of ta tree) - ✔✔cone
cylinder
heiloid
frustum of a heiloid
paraboloid
frustum of a parboiled
✔✔what is the device used to measure volume of an object by submerging it in water? -
✔✔xylometer
✔✔the solid wood content of a cord is 128 cu.ft. true or false? explain - ✔✔false; solid
wood content is 60-95 ft^3/cord
✔✔what is 1 MBF of wood? - ✔✔thousand board feet
✔✔solid wood content of stack of wood increases with stick length - ✔✔false
✔✔solid wood content of a stack of wood increases with average bolt diameter - ✔✔true
✔✔why is weight used now instead of volume in most lumber and paper mills? - ✔✔-
good for irregular solids where volume is difficult to obtain
-for pulpwood, the product is expressed weight
-fast
-encourages delivery of freshly cut wood to the mill
✔✔there are two broad types of log rules
a. ______ log rules: examples is are:
b. ______ log rules: examples is are: - ✔✔a. diagram: scribner log rule
b. mathematical: doyle log rule, international log rule
✔✔doyle log rule results in overruns for ______ logs and underpins for _____ logs.
explain why? - ✔✔overrun for small logs and underrun for large logs
✔✔what is the difference between international 1/4 and international 1/8? -
✔✔international 1/4" modified from international 1/8"
✔✔in doyle long rule contraction the first step was to assume a square cant from the
log. what are the dimensions of the cant? - ✔✔inches
✔✔doyle volue is always lower than international 1/4 - ✔✔true
