exam 3 Chao Wang cm 2113 | Questions and Answers
Dozer is good for applications of less than 300ft short haul, and scraper is good for
applications of up to 3,000ft medium haul. - -True
-An advantage of a crawler dozer as compared with a wheel-type dozer is higher speed. - -
False
-Which of the following work tasks can be performed by a dozer? - -Spreading, Striping
and Backfilling
-The ________________ is very effective for side-casting material, particularly for backfilling or
making sidehill cuts. - -Angle Blade
-__________ is a technique whereby the blade end spillage from the first pass or the sidewalls
from previous cuts are used to hold the material in front of the dozer blade on subsequent
passes. - -Slot dozing
-Which of the following factors need to be considered when selecting a proper scraper for
your project? - -Scraper configuration, volume of material and job size
-Articulated trucks consist of two individual frames joined by pin, and can be easily
operated over soft ground. - -True
-A contractor wants to investigate the production and cost differences of using a 4S blade
on a crawler-type dozer (D4H-4S). The material is dry clay and is to be moved a distance of
150 ft from the beginning of the cut. The dozing is uphill on a 20% grade. The operator will
have average skill. The site conditions will be dark for visibility. The material weighs 108
pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is
the operator correction factor? - -.75
-A contractor wants to investigate the production and cost differences of using a 4S blade
on a crawler-type dozer (D4H-4S). The material is dry clay and is to be moved a distance of
150 ft from the beginning of the cut. The dozing is uphill on a 20% grade. The operator will
have average skill. The site conditions will be dark for visibility. The material weighs 108
pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is
the material-weight correction factor? Assume the percent swell is 12%. - -.88
-A contractor wants to investigate the production and cost differences of using a 4S blade
on a crawler-type dozer (D4H-4S). The material is dry clay and is to be moved a distance of
150 ft from the beginning of the cut. The dozing is uphill on a 20% grade. The operator will
have average skill. The site conditions will be dark for visibility. The material weighs 108
pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is
the visibility correction factor? - -.80
Dozer is good for applications of less than 300ft short haul, and scraper is good for
applications of up to 3,000ft medium haul. - -True
-An advantage of a crawler dozer as compared with a wheel-type dozer is higher speed. - -
False
-Which of the following work tasks can be performed by a dozer? - -Spreading, Striping
and Backfilling
-The ________________ is very effective for side-casting material, particularly for backfilling or
making sidehill cuts. - -Angle Blade
-__________ is a technique whereby the blade end spillage from the first pass or the sidewalls
from previous cuts are used to hold the material in front of the dozer blade on subsequent
passes. - -Slot dozing
-Which of the following factors need to be considered when selecting a proper scraper for
your project? - -Scraper configuration, volume of material and job size
-Articulated trucks consist of two individual frames joined by pin, and can be easily
operated over soft ground. - -True
-A contractor wants to investigate the production and cost differences of using a 4S blade
on a crawler-type dozer (D4H-4S). The material is dry clay and is to be moved a distance of
150 ft from the beginning of the cut. The dozing is uphill on a 20% grade. The operator will
have average skill. The site conditions will be dark for visibility. The material weighs 108
pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is
the operator correction factor? - -.75
-A contractor wants to investigate the production and cost differences of using a 4S blade
on a crawler-type dozer (D4H-4S). The material is dry clay and is to be moved a distance of
150 ft from the beginning of the cut. The dozing is uphill on a 20% grade. The operator will
have average skill. The site conditions will be dark for visibility. The material weighs 108
pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is
the material-weight correction factor? Assume the percent swell is 12%. - -.88
-A contractor wants to investigate the production and cost differences of using a 4S blade
on a crawler-type dozer (D4H-4S). The material is dry clay and is to be moved a distance of
150 ft from the beginning of the cut. The dozing is uphill on a 20% grade. The operator will
have average skill. The site conditions will be dark for visibility. The material weighs 108
pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is
the visibility correction factor? - -.80
