CM 2113 UPDATED STUDY EXAMS GUIDE
QUESTIONS AND ANSWERS SURE A+
✔✔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
✔✔crawler cranes - ✔✔mounted on a pair of parallel crawler tracks, which provide the
crane with good travel capability around the job site
✔✔telescoping boom truck mounted cranes - ✔✔-Travel on highways, can change
boom length, have outriggers for stability.
, -Outriggers on large steel mats to reduce ground pressure and prevent damage to
pavement
-Crane positioned on hollow-core precast concrete panel slab
✔✔Lattice-boom truck mounted cranes - ✔✔The lattice-boom structure is lightweight.
This reduction in boom weight means additional lift capacity, as the machine
predominately handles hoist load and less weight of boom
✔✔rough-terrain cranes - ✔✔These units are equipped with unusually large wheels and
closely spaced axles to improve maneuverability at the job site. They earn the right to
their name by their high ground clearance, as well as the ability to move on steep
slopes
✔✔All-terrain cranes - ✔✔They have an undercarriage capable of long-distance
highway travel. Yet the carrier has all-axle drive and all-wheel steering, crab steering,
large tires, and high ground clearance.
✔✔crawler cranes for heavy-lifting - ✔✔additional counterweight mounted on a wheeled
platform to increase lifting capacity. Ring system, "ringer," a heavy counterweight
system supported on a large circular turntable ring
✔✔Pros and cons of different types of cranes - ✔✔Rough terrain crane "pickers"
-Pros= off road applications, set up quickly, very maneuverability.
-Cons= limitation of capacity and cost of freight
*All terrain crane
-pros= travel on highway and rough terrains
-cons= limitation of capacity, set up time, maneuverability and foot print.
*Crawler
-Pros= don't require outriggers, very high lifting capacity, any site even soft soils, travel
with load
-Cons= expensive, set up time, large foot print, lot of matting, larger number of fall off
loads
✔✔top slewing cranes - ✔✔cranes can increase their height
✔✔Tower cranes - ✔✔The flexibility of its freely suspended hook moving in three planes
provides a tremendous advantage in terms of load pick-up and positioning.
Advantage of having both the operator and jib above the construction site.
✔✔Crane selection factors - ✔✔
✔✔Hoisting - ✔✔The hoist cable runs from the hoist drum located on the crane's
counter jib, through the jib and then to the trolley and down to the hook
QUESTIONS AND ANSWERS SURE A+
✔✔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
✔✔crawler cranes - ✔✔mounted on a pair of parallel crawler tracks, which provide the
crane with good travel capability around the job site
✔✔telescoping boom truck mounted cranes - ✔✔-Travel on highways, can change
boom length, have outriggers for stability.
, -Outriggers on large steel mats to reduce ground pressure and prevent damage to
pavement
-Crane positioned on hollow-core precast concrete panel slab
✔✔Lattice-boom truck mounted cranes - ✔✔The lattice-boom structure is lightweight.
This reduction in boom weight means additional lift capacity, as the machine
predominately handles hoist load and less weight of boom
✔✔rough-terrain cranes - ✔✔These units are equipped with unusually large wheels and
closely spaced axles to improve maneuverability at the job site. They earn the right to
their name by their high ground clearance, as well as the ability to move on steep
slopes
✔✔All-terrain cranes - ✔✔They have an undercarriage capable of long-distance
highway travel. Yet the carrier has all-axle drive and all-wheel steering, crab steering,
large tires, and high ground clearance.
✔✔crawler cranes for heavy-lifting - ✔✔additional counterweight mounted on a wheeled
platform to increase lifting capacity. Ring system, "ringer," a heavy counterweight
system supported on a large circular turntable ring
✔✔Pros and cons of different types of cranes - ✔✔Rough terrain crane "pickers"
-Pros= off road applications, set up quickly, very maneuverability.
-Cons= limitation of capacity and cost of freight
*All terrain crane
-pros= travel on highway and rough terrains
-cons= limitation of capacity, set up time, maneuverability and foot print.
*Crawler
-Pros= don't require outriggers, very high lifting capacity, any site even soft soils, travel
with load
-Cons= expensive, set up time, large foot print, lot of matting, larger number of fall off
loads
✔✔top slewing cranes - ✔✔cranes can increase their height
✔✔Tower cranes - ✔✔The flexibility of its freely suspended hook moving in three planes
provides a tremendous advantage in terms of load pick-up and positioning.
Advantage of having both the operator and jib above the construction site.
✔✔Crane selection factors - ✔✔
✔✔Hoisting - ✔✔The hoist cable runs from the hoist drum located on the crane's
counter jib, through the jib and then to the trolley and down to the hook
