CM 2113 FINAL EXAM LATEST
A contractor has decided to use a dragline to excavate a ditch to drain
stormwater runoff from her construction site. The material to be
excavated is a light moist clay weighing 2,000 pounds per bank cubic
yard with a swell of 18% and shrinkage of 25%. Given the density of the
material to be loaded, the contractor has determined that the largest
heavy-duty dragline bucket that can be safely mounted on the crane has
a rated capacity of 2.5 cubic yards. We assume that we know the average
depth of the dig is 11.9 feet and the average angle of the swing is 75
degrees, and the contractor plans to operate the machine about 48
minutes per hour. Please answer this question based on the following
given tables. - ANSWERS-305
A contractor has decided to use a dragline to excavate a ditch to drain
stormwater runoff from her construction site. The material to be
excavated is a light moist clay weighing 2,000 pounds per bank cubic
yard with a swell of 18% and shrinkage of 25%. Given the density of the
material to be loaded, the contractor has determined that the largest
heavy-duty dragline bucket that can be safely mounted on the crane has
a rated capacity of 2.5 cubic yards. We assume that we know the average
depth of the dig is 11.9 feet and the average angle of the swing is 75
degrees, and the contractor plans to operate the machine about 48
minutes per hour. What is the optimum depth of cut for this machine
based on the given scenario? - ANSWERS-8.5
A contractor has decided to use a dragline to excavate a ditch to drain
stormwater runoff from her construction site. The material to be
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,CM 2113 FINAL EXAM LATEST
excavated is a light moist clay weighing 2,000 pounds per bank cubic
yard with a swell of 18% and shrinkage of 25%. Given the density of the
material to be loaded, the contractor has determined that the largest
heavy-duty dragline bucket that can be safely mounted on the crane has
a rated capacity of 2.5 cubic yards. We assume that we know the average
depth of the dig is 11.9 feet and the average angle of the swing is 75
degrees, and the contractor plans to operate the machine about 48
minutes per hour. Please answer this question based on the following
given tables.What is the swing-depth factor for this machine based on
the given scenario? - ANSWERS-1.00
What is the job efficiency for this machine based on the given scenario?
- ANSWERS-0.8
What is the actual production rate for this machine based on the given
scenario? - ANSWERS-244
Using Fig. 17.13, select the minimum-length boom required to hoist a
load of 80,000 lb from a truck at ground level and place it on a platform
76 ft above the ground. The minimum allowable vertical distance from
the bottom of the load to the boom point of the crane is 42 ft. The
maximum horizontal distance from the center of rotation of the crane to
the hoist line of the crane when lifting the load is 40 ft. - ANSWERS-
120
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2
, CM 2113 FINAL EXAM LATEST
A 25-ton truck-mounted hydraulic crane is being used on a construction
site. The maximum horizontal distance from the center of rotation of the
crane to the hoist line of the crane when lifting a load of 9,000 lb will be
40 ft. Use Table 17.2 crane data to select the minimum length boom
required to safely hoist the load. - ANSWERS-64
Liftem High Construction Co. has determined that the heaviest lift on a
project they are estimating weighs 26,000 lb. The project's tower crane
will make this lift (see Table 17.3). From the proposed tower crane
location on the building site the required reach for this lift will be 90 ft.
The crane will be equipped with an L6 jib and a four-part hoist line. This
critical lift is of a piece of HVAC equipment and will require a 1,400-lb
spreader bar attached to a 300-lb set of slings. If assembled in the
proposed configuration, can the crane safely make the pick? -
ANSWERS-no
Dozer is good for applications of less than 300ft short haul, and scraper
is good for applications of up to 3,000ft medium haul. - ANSWERS-
True
An advantage of a crawler dozer as compared with a wheel-type dozer is
higher speed. - ANSWERS-False
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3
A contractor has decided to use a dragline to excavate a ditch to drain
stormwater runoff from her construction site. The material to be
excavated is a light moist clay weighing 2,000 pounds per bank cubic
yard with a swell of 18% and shrinkage of 25%. Given the density of the
material to be loaded, the contractor has determined that the largest
heavy-duty dragline bucket that can be safely mounted on the crane has
a rated capacity of 2.5 cubic yards. We assume that we know the average
depth of the dig is 11.9 feet and the average angle of the swing is 75
degrees, and the contractor plans to operate the machine about 48
minutes per hour. Please answer this question based on the following
given tables. - ANSWERS-305
A contractor has decided to use a dragline to excavate a ditch to drain
stormwater runoff from her construction site. The material to be
excavated is a light moist clay weighing 2,000 pounds per bank cubic
yard with a swell of 18% and shrinkage of 25%. Given the density of the
material to be loaded, the contractor has determined that the largest
heavy-duty dragline bucket that can be safely mounted on the crane has
a rated capacity of 2.5 cubic yards. We assume that we know the average
depth of the dig is 11.9 feet and the average angle of the swing is 75
degrees, and the contractor plans to operate the machine about 48
minutes per hour. What is the optimum depth of cut for this machine
based on the given scenario? - ANSWERS-8.5
A contractor has decided to use a dragline to excavate a ditch to drain
stormwater runoff from her construction site. The material to be
END OF
PAGE
1
,CM 2113 FINAL EXAM LATEST
excavated is a light moist clay weighing 2,000 pounds per bank cubic
yard with a swell of 18% and shrinkage of 25%. Given the density of the
material to be loaded, the contractor has determined that the largest
heavy-duty dragline bucket that can be safely mounted on the crane has
a rated capacity of 2.5 cubic yards. We assume that we know the average
depth of the dig is 11.9 feet and the average angle of the swing is 75
degrees, and the contractor plans to operate the machine about 48
minutes per hour. Please answer this question based on the following
given tables.What is the swing-depth factor for this machine based on
the given scenario? - ANSWERS-1.00
What is the job efficiency for this machine based on the given scenario?
- ANSWERS-0.8
What is the actual production rate for this machine based on the given
scenario? - ANSWERS-244
Using Fig. 17.13, select the minimum-length boom required to hoist a
load of 80,000 lb from a truck at ground level and place it on a platform
76 ft above the ground. The minimum allowable vertical distance from
the bottom of the load to the boom point of the crane is 42 ft. The
maximum horizontal distance from the center of rotation of the crane to
the hoist line of the crane when lifting the load is 40 ft. - ANSWERS-
120
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2
, CM 2113 FINAL EXAM LATEST
A 25-ton truck-mounted hydraulic crane is being used on a construction
site. The maximum horizontal distance from the center of rotation of the
crane to the hoist line of the crane when lifting a load of 9,000 lb will be
40 ft. Use Table 17.2 crane data to select the minimum length boom
required to safely hoist the load. - ANSWERS-64
Liftem High Construction Co. has determined that the heaviest lift on a
project they are estimating weighs 26,000 lb. The project's tower crane
will make this lift (see Table 17.3). From the proposed tower crane
location on the building site the required reach for this lift will be 90 ft.
The crane will be equipped with an L6 jib and a four-part hoist line. This
critical lift is of a piece of HVAC equipment and will require a 1,400-lb
spreader bar attached to a 300-lb set of slings. If assembled in the
proposed configuration, can the crane safely make the pick? -
ANSWERS-no
Dozer is good for applications of less than 300ft short haul, and scraper
is good for applications of up to 3,000ft medium haul. - ANSWERS-
True
An advantage of a crawler dozer as compared with a wheel-type dozer is
higher speed. - ANSWERS-False
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