Extra Credit Opportunity Excavators_ Shovels_ Draglines_ Hoes_ and Clamshells

Document Sample
Extra Credit Opportunity Excavators_ Shovels_ Draglines_ Hoes_ and Clamshells Powered By Docstoc
					     Extra Credit Opportunity
Excavators, Shovels, Draglines, Hoes,
          and Clamshells
             02/07/2012
1.   Part 1 - Excavator Problem
     Find cycles/hr, swing-depth factor, and heaped volume for a large
     excavator
     Heaped bucket capacity is 3 CY.
     The material is rock with a bucket fill factor of 0.50.
     Job efficiency is 50 min/h.
     Average depth of cut is 10 ft.
     Maximum depth of cut is 20 ft.
     Average swing is 90.


 A little help…..
1.   Part 1 - Excavator Problem
     Find cycles/hr, swing-depth factor, and
     heaped volume for a large excavator
     Heaped bucket capacity is 3 CY.
     The material is rock with a bucket fill factor
     of 0.50.
     Job efficiency is 50 min/h.
     Average depth of cut is 10 ft.
     Maximum depth of cut is 20 ft.
     Average swing is 90.
1.    Part 1 - Excavator Problem
      Find cycles/hr, swing-depth factor, and
      heaped volume for a large excavator
      Heaped bucket capacity is 3 CY.
      The material is rock with a bucket fill factor
      of 0.50.
      Job efficiency is 50 min/h.
      Average depth of cut is 10 ft.
      Maximum depth of cut is 20 ft.
      Average swing is 90.




     Cycles/hr = 100 cycles/hour
      Swing-depth factor = 1.10
       Heaped volume = 3 LCY
2.   Part 2 - Excavator Problem
     Find the bucket fill factor, job efficiency, and production for a large
     excavator.
     Heaped bucket capacity is 3/4 CY.
     The material is rock with a bucket fill factor of 0.50.
     Job efficiency is 50 min/h.
     Average depth of cut is 10 ft.
     Maximum depth of cut is 20 ft.
     Average swing is 90.


 A little help…..
2.   Part 2 - Excavator Problem
     Find the bucket fill factor, job efficiency,
     and production for a large excavator.
     Heaped bucket capacity is 3 CY.
     The material is rock with a bucket fill factor
     of 0.50.
     Job efficiency is 50 min/h.
     Average depth of cut is 10 ft.
     Maximum depth of cut is 20 ft.
     Average swing is 90.
   2.   Part 2 - Excavator Problem
        Find the bucket fill factor, job efficiency,
        and production for a large excavator.
        Heaped bucket capacity is 3 CY.
        The material is rock with a bucket fill factor
        of 0.50.
        Job efficiency is 50 min/h.
        Average depth of cut is 10 ft.
        Maximum depth of cut is 20 ft.
        Average swing is 90.




Bucket Fill Factor = 0.50
Job Efficiency = 50/60 = 0.833
Production = 100 cycles/hour X 1.10 X 3LCY X 0.50 X (50/60) = 137.5 LCY/hr
3.   Which operation best suits a shovel or an
     excavator? Fill in the blank

• Digging at or above the tracks or tires is best
  for a(n) ____________.



• Digging below the tracks or tires is best for
  a(n) _____________.
3.   Which operation best suits a shovel or an
     exavator? Fill in the blank

• Digging at or above the tracks or tires is best for a
  shovel.


• Digging below the tracks or tires is best for an
  excavator.

• WHY?
4.   In general when estimating efficiency, the amount
     of effective work in an hour is typically assumed
     to be…

A.   60-min/hour
B.   45-min/hour
C.   50-min/hour
D.   40-min/hour
4.   In general when estimating efficiency, the amount
     of effective work in an hour is typically assumed
     to be…

A.   60-min/hour
B.   45-min/hour
C.   50-min/hour (0.833 efficiency)
D.   40-min/hour
5.  Which crane-shovel piece of equipment
    has the longest reach for digging and
    dumping?
EITHER


Clamshell            OR          Dragline
5.  Which crane-shovel piece of equipment
    has the longest reach for digging and
    dumping?
EITHER


Clamshell            OR          Dragline

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:5
posted:9/25/2013
language:
pages:13