CM 2113 EXAM 3 CHAO WANG - QUESTIONS AND ANSWERS 100% CORRECT.
Dozer is good for applications of less than 300ft short haul, and scraper is good for applications of up to
3,000ft medium haul. - (answer)True
An advantage of a crawler dozer as compared with a wheel-type dozer is higher speed. - (answer)False
Which of the following work tasks can be performed by a dozer? - (answer)Spreading, Striping and
Backfilling
The ________________ is very effective for side-casting material, particularly for backfilling or making
sidehill cuts. - (answer)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. -
(answer)Slot dozing
Which of the following factors need to be considered when selecting a proper scraper for your project? -
(answer)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. - (answer)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? - (answer).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%. - (answer).88
Dozer is good for applications of less than 300ft short haul, and scraper is good for applications of up to
3,000ft medium haul. - (answer)True
An advantage of a crawler dozer as compared with a wheel-type dozer is higher speed. - (answer)False
Which of the following work tasks can be performed by a dozer? - (answer)Spreading, Striping and
Backfilling
The ________________ is very effective for side-casting material, particularly for backfilling or making
sidehill cuts. - (answer)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. -
(answer)Slot dozing
Which of the following factors need to be considered when selecting a proper scraper for your project? -
(answer)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. - (answer)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? - (answer).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%. - (answer).88
