CM 2113 FINAL EXAM UPDATED ALL QUESTIONS
AND ANSWERS SURE A+
✔✔single powered axle pusher-loader wheel-tractor scrapers - ✔✔suited for jobs where
the haul-road rolling resistance is low and grades are minimal. They become
uneconomical when haul grades are greater than 5% and return grades are greater
than 12%
✔✔self-loading scrapers - ✔✔Heavier and more costly than conventional scrapers, can
be economical in isolated work and for stripping materials
✔✔the capacity of a scraper - ✔✔Expressed in bank cubic yards, approximated by
multiplying the loose volume in the bowl by an appropriate swell factor
✔✔backtrack loading - ✔✔Most common. It permits all scrapers to load in the same
area. However, the slowest bc of the addition pusher travel distance
✔✔scraper fixed cycle time - ✔✔1. Spot time
2. Load time
3. Maneuver and dump time
✔✔crawler dozer - ✔✔-good for short distance
-can handle tight soil
, -can push large blade loads
-exerts low ground bearing pressure
-works on almost any terrain
-can work on soft ground and mud slick surfaces
✔✔crawler dozer - ✔✔(tracklaying) - the work horses of the construction industry
✔✔How to classify trucks - ✔✔1. Size and engine type (gas, diesel)
2. Number of gears
3. Drive type (2 wheel, 4 wheel)
4. Number of wheels and axles
5. Method of dumping
6. Material being hauled
7. Holding capacity
✔✔trucks - ✔✔distance is a major factor in selecting haul units
✔✔dozers - ✔✔they are designed to provide high drawbar pull and tractive effort.
✔✔crawler dozer - ✔✔exerts low ground-bearing pressure adding to its versaility
✔✔Dozers - ✔✔equipped with a blade are standard equipment for excavating
✔✔Dozers - ✔✔equipped with special clearing blades are used for land clearing
✔✔Dozers - ✔✔equipped with push blades or blocms are used for assisting scrapers to
load
✔✔Dozer - ✔✔can have a rear mounted ripper for loosing and breaking up rock
✔✔Fill factor - ✔✔adjusts heaped capacity in lcy based on the type of material being
handled
✔✔Excavators job efficiency - ✔✔Management conditions:
- Skill, training, and motivation of workers
- Planning, job layout, supervision, and coordination of work
Job conditions:
- Topography and work dimensions
- Surface and weather conditions
✔✔cranes - ✔✔Mobile cranes and tower cranes are the primary machine used for the
vertical movement of construction materials
AND ANSWERS SURE A+
✔✔single powered axle pusher-loader wheel-tractor scrapers - ✔✔suited for jobs where
the haul-road rolling resistance is low and grades are minimal. They become
uneconomical when haul grades are greater than 5% and return grades are greater
than 12%
✔✔self-loading scrapers - ✔✔Heavier and more costly than conventional scrapers, can
be economical in isolated work and for stripping materials
✔✔the capacity of a scraper - ✔✔Expressed in bank cubic yards, approximated by
multiplying the loose volume in the bowl by an appropriate swell factor
✔✔backtrack loading - ✔✔Most common. It permits all scrapers to load in the same
area. However, the slowest bc of the addition pusher travel distance
✔✔scraper fixed cycle time - ✔✔1. Spot time
2. Load time
3. Maneuver and dump time
✔✔crawler dozer - ✔✔-good for short distance
-can handle tight soil
, -can push large blade loads
-exerts low ground bearing pressure
-works on almost any terrain
-can work on soft ground and mud slick surfaces
✔✔crawler dozer - ✔✔(tracklaying) - the work horses of the construction industry
✔✔How to classify trucks - ✔✔1. Size and engine type (gas, diesel)
2. Number of gears
3. Drive type (2 wheel, 4 wheel)
4. Number of wheels and axles
5. Method of dumping
6. Material being hauled
7. Holding capacity
✔✔trucks - ✔✔distance is a major factor in selecting haul units
✔✔dozers - ✔✔they are designed to provide high drawbar pull and tractive effort.
✔✔crawler dozer - ✔✔exerts low ground-bearing pressure adding to its versaility
✔✔Dozers - ✔✔equipped with a blade are standard equipment for excavating
✔✔Dozers - ✔✔equipped with special clearing blades are used for land clearing
✔✔Dozers - ✔✔equipped with push blades or blocms are used for assisting scrapers to
load
✔✔Dozer - ✔✔can have a rear mounted ripper for loosing and breaking up rock
✔✔Fill factor - ✔✔adjusts heaped capacity in lcy based on the type of material being
handled
✔✔Excavators job efficiency - ✔✔Management conditions:
- Skill, training, and motivation of workers
- Planning, job layout, supervision, and coordination of work
Job conditions:
- Topography and work dimensions
- Surface and weather conditions
✔✔cranes - ✔✔Mobile cranes and tower cranes are the primary machine used for the
vertical movement of construction materials
