©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 11:08AM. A+
Earthwork Exam 2 Questions And Answers
|Latest 2025 | Guaranteed Pass.
Factors an engineer must identify when considering the material-handling -
Answer✔Equipment type
Size
Number
The Fundamental Principle of Equipment Power - Answer✔1. Speed affects cycle time
2. Cycle time drives production
3. Production determines cost
Three power considerations - Answer✔Required power (baseline)
Available power (power machine has)
Useable power (based on conditions/equip, use)
RPM (N) - Answer✔Rotations per minute (measure of engine speed)
Horsepower (HP) - Answer✔a common unit of power, Gross HP (theoretical)
Flywheel HP (measured)
Rated HP (takes SAE efficiency into account)
Torque - Answer✔a force that causes rotation
Developed power (foot pounds)
1
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 11:08AM. A+
SAE Efficiency - Answer✔Assume .85 efficiency (unless number is given)
Theoretical engine efficiency is degraded by engine accessories
Transmission / Gear Ratio - Answer✔Conversion of engine rpm to drive shaft rotations
Rolling Resistance - Answer✔resistance of a level surface to constant-velocity motion across it
Grade Resistance - Answer✔The force-opposing movement of a machine up a frictionless slope
Coefficient of Traction - Answer✔factor by which the total weight on the drive wheels or tracks
should be multiplied to determine the maximum possible tractive force
Rimpull - Answer✔Tractive force between the tires of a machine's driving wheels and the
surface on which they travel (normally wheeled equipment)
Drawbar pull - Answer✔available pull exerted on a towed load (normally track type equipment)
Payload (Struck and Heaped Volume) - Answer✔Carrying capacity of equipment, volumetric &
gravimetric
Struck Vol - soil even w the top of bed or bucket
Heaped Vol - Soil Above the top of bed or bucket
The average cycle time table for hoes maybe used when all of the following are true EXCEPT -
Answer✔Swing angle is 120 to 180 degrees
When operating a hoe, the worst fill factor is for which of the following excavated material.? -
Answer✔Poorly blasted rock
A truck and trailer dumps its load by transferring the trailer to the dump truck. - Answer✔False
Utility Profile plans commonly use different horizontal and vertical scales. - Answer✔True
Which TWO of the following are considered gravity lines? - Answer✔Sanitary Sewer
Storm Drain
When using trench boxes, the entire length of the excavation must be protected. -
Answer✔False
Failure planes of soil banks vary depending on the type of soil - Answer✔True
2
Earthwork Exam 2 Questions And Answers
|Latest 2025 | Guaranteed Pass.
Factors an engineer must identify when considering the material-handling -
Answer✔Equipment type
Size
Number
The Fundamental Principle of Equipment Power - Answer✔1. Speed affects cycle time
2. Cycle time drives production
3. Production determines cost
Three power considerations - Answer✔Required power (baseline)
Available power (power machine has)
Useable power (based on conditions/equip, use)
RPM (N) - Answer✔Rotations per minute (measure of engine speed)
Horsepower (HP) - Answer✔a common unit of power, Gross HP (theoretical)
Flywheel HP (measured)
Rated HP (takes SAE efficiency into account)
Torque - Answer✔a force that causes rotation
Developed power (foot pounds)
1
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 11:08AM. A+
SAE Efficiency - Answer✔Assume .85 efficiency (unless number is given)
Theoretical engine efficiency is degraded by engine accessories
Transmission / Gear Ratio - Answer✔Conversion of engine rpm to drive shaft rotations
Rolling Resistance - Answer✔resistance of a level surface to constant-velocity motion across it
Grade Resistance - Answer✔The force-opposing movement of a machine up a frictionless slope
Coefficient of Traction - Answer✔factor by which the total weight on the drive wheels or tracks
should be multiplied to determine the maximum possible tractive force
Rimpull - Answer✔Tractive force between the tires of a machine's driving wheels and the
surface on which they travel (normally wheeled equipment)
Drawbar pull - Answer✔available pull exerted on a towed load (normally track type equipment)
Payload (Struck and Heaped Volume) - Answer✔Carrying capacity of equipment, volumetric &
gravimetric
Struck Vol - soil even w the top of bed or bucket
Heaped Vol - Soil Above the top of bed or bucket
The average cycle time table for hoes maybe used when all of the following are true EXCEPT -
Answer✔Swing angle is 120 to 180 degrees
When operating a hoe, the worst fill factor is for which of the following excavated material.? -
Answer✔Poorly blasted rock
A truck and trailer dumps its load by transferring the trailer to the dump truck. - Answer✔False
Utility Profile plans commonly use different horizontal and vertical scales. - Answer✔True
Which TWO of the following are considered gravity lines? - Answer✔Sanitary Sewer
Storm Drain
When using trench boxes, the entire length of the excavation must be protected. -
Answer✔False
Failure planes of soil banks vary depending on the type of soil - Answer✔True
2
