Ground, air, water & what it costs

Applied Field Engineering

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Formula pick

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Rearranging

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Setup & units

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Answers

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Grades, Slopes & Earthwork

L1
Reading the ground
rise, run, grade, ratio — which number is which
★★★★★
Start
L2
Percent grade, three ways
3:1, 33 %, 18.4° — the same slope, and the triangle that traps everyone
★★★★★
Start
L3
Elevation on the grade
carry a benchmark down the line — and mind the sign
★★★★★
Start
L4
Earthwork volumes
average end area, the prismoidal correction, and a guess before either
★★★★★
Start
L5
Swell and shrink
one cubic metre, three sizes, and only one of them rides in the truck
★★★★★
Start
L6
Ordering the material
concrete by volume, asphalt by mass, and a heap that is neither
★★★★★
Start
★
The Cut Sheet
the boss · no calculator · grade to elevation to volume to trucks
★★★★★
Start

Curves, Traverse & Levelling

L8
The language of curves
which element is which — radius, tangent, chord, degree of curve
★★★★★
Start
L9
Horizontal curve geometry
tangent length and curve length from radius and deflection
★★★★★
Start
L10
Chords and offsets
long chord, external distance and middle ordinate for stakeout
★★★★★
Start
L11
Vertical curves
length from K, elevation along the parabola, and the turning point
★★★★★
Start
L12
Sight distance and speed
stopping sight distance, crest curve length and superelevation
★★★★★
Start
L13
The traverse
latitudes, departures, closure error and the precision ratio
★★★★★
Start
L14
Level runs and stadia
carry an elevation with backsights and foresights; distance by stadia
★★★★★
Start
★
Closing the Loop
the boss · no calculator · azimuths to lat/dep to closure to the verdict
★★★★★
Start

Stacks & Plumes

L16
Reading the air
which number is a lapse rate, a concentration, an emission rate, a flux
★★★★★
Start
L17
Lapse and pressure
how the air cools going up, and how it thins
★★★★★
Start
L18
Wind aloft
the anemometer is at 10 m, and the stack is not
★★★★★
Start
L19
The stack itself
what leaves it, what pulls it, and how tall it has to be
★★★★★
Start
L20
Plume rise
the metres a hot plume buys you, and what they are worth
★★★★★
Start
L21
Emission bookkeeping
from an analyser reading to a number a permit can be written against
★★★★★
Start
L22
The Gaussian plume
what reaches the ground, and how bad it ever gets
★★★★★
Start
L23
Capture and compliance
what the device keeps, and whether the test may be believed
★★★★★
Start
★
The Stack Test
the boss · no calculator · exit velocity to the fenceline verdict
★★★★★
Start

Noise on Site

L25
Decibels first
sound power, sound pressure, absorption — which is which
★★★★★
Start
L26
Adding noise
80 + 80 = 83, and the arithmetic-add trap is the whole lesson
★★★★★
Start
L27
Distance attenuation
6 dB a doubling — and where the compliance line falls
★★★★★
Start
L28
Rooms that ring
Sabine, Eyring, and the sabins that buy the difference
★★★★★
Start
L29
Walls that block
transmission loss, the mass law, and the door that ruins the wall
★★★★★
Start
L30
Hearing safety
the exposure clock, and which jurisdiction's clock you are on
★★★★★
Start
★
The Noise Survey
the boss · no calculator · power to level to clock to verdict
★★★★★
Start

Water on the Land

L32
Water in the soil
the reserve, and how much of it the crop may spend
★★★★★
Start
L33
Crop thirst
what the canopy spends, and the days it buys
★★★★★
Start
L34
Net and gross
the rain that counted, the losses that did not
★★★★★
Start
L35
Running the set
how long the pump runs, and whether it can keep up
★★★★★
Start
L36
Calibrating the sprayer
the most consequential arithmetic on the farm
★★★★★
Start
L37
Tank mixing
ground per tank, tanks per field, and what goes in the jug
★★★★★
Start
L38
Seeds and stands
from a target stand to a weight of seed, corrected for what lives
★★★★★
Start
L39
Field work rates
hectares an hour, and the hours before the rain
★★★★★
Start
★
The Irrigation Day
the boss · no calculator · one dry week, soil to pump
★★★★★
Start

Navigation & Field Craft

L41
Map and pace
the sheet says one thing, your boots measure another
★★★★★
Start
L42
Slope distance and height
the map is flat and the hill is not
★★★★★
Start
L43
Time on the trail
an hour per five kilometres, an hour per six hundred metres up
★★★★★
Start
L44
Bearings and the needle
three norths, two corrections, and the flip that wraps at 360
★★★★★
Start
L45
The great circle
the shortest track, the steerable one, and the gap between them
★★★★★
Start
L46
Dead reckoning
where you ought to be, where you are, and what moved you
★★★★★
Start
L47
The wind triangle
the air moves too, and it takes speed from one side and heading from the other
★★★★★
Start
L48
Horizon and clock
how far you can see, and what the sun's timing says about where you are
★★★★★
Start
★
The Field Exercise
the boss · no calculator · pace it, map it, climb it, time it, shoot the bearing home
★★★★★
Start

Engineering Economics

L50
Money moves in time
five symbols, one timeline — P, F, A, i and n
★★★★★
Start
L51
Single payments
one sum, forward and back — and the exponent that does it
★★★★★
Start
L52
Honest rates
what a quoted rate really costs, and what it is really worth
★★★★★
Start
L53
Uniform series
equal annual money, carried forward and dragged back
★★★★★
Start
L54
Capital recovery
one machine, two coats — the CRF and the loan payment
★★★★★
Start
L55
Comparing alternatives
unequal lives, and the only referee that is fair to both
★★★★★
Start
L56
Payback and return
the three quick screens, and exactly what each one ignores
★★★★★
Start
L57
Wearing out on paper
two schedules for the same truck, and neither is its value
★★★★★
Start
★
The Tender
the boss · no calculator · two bids, priced and signed
★★★★★
Start

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