CM 2113 EXAM 3 QUESTIONS WITH VERIFIED SOLUTIONS LATEST UPDATE 2026

CM 2113 EXAM 3 QUESTIONS WITH VERIFIED SOLUTIONS LATEST UPDATE 2026 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 Which of the following work tasks can be performed by a dozer? - Answers Spreading, Striping, Backfilling The ________ is very effective for side-casting material, particularly for backfilling or making sidehill. - Answers 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. - Answers Slot dozzing Which of the following factors need to be considered when selecting a proper scraper for your project? - Answers Scraper configuration, Volume of material, Job size Articulated trucks consist of two individual frames joined by pin, and can be easily operated over soft ground. - Answers True Buckets of loaders are rated in both heaped and struck capacities. _________ is based on the SAE standards of a 2:1 material repose angle. - Answers Heaped capacity Which of the following is a job condition that could affect the operator's job efficiency? - Answers Surface and weather conditions Fill factor is the ratio of the actual loose volume of material in the bucket compared to the bucket's rated-heaped capacity. It varies based on the type of material being handled and the type of excavator. - Answers True Which of the following is not a disadvantage of a crawler crane? - Answers Limited capacity Shhh hi pet and medium distance passes, such as backfilling, grading, and spreading full material - Answers Straight blades Working stockpiles and drifting loose or no cohesive materials - Answers Universal blades Combination of the S and U designs - Answers Semi-U blades Mounted on large dozers that are used primarily for push-loading scrapers, limited utility in pushing materials and should not be used for production dozing, cannot be tilted, pitched, or angled - Answers Cushion blades Blade-to-blade dozing. Two machines maneuver so that their blades are next to each other during the pushing phase of the production cycle - Answers Side-to-side What factors affect dozer real production rates? - Answers Blade type, type and condition of material, cycle time Excavating, loading, hauling, and dumping material over medium to long haul distances - Answers Scrapers Scrapers production cycle - Answers 1. loading 2. haul travel 3. dumping and spreading 4. turn 5. return travel 6. turn getting next load towed by a tractor, effective in short hauls - Answers 2-axle scraper one engine - Answers single powered scraper dual engines, greater tractive effort, 25% initially more expensive then conventional scrapers. for that reason, they commonly considered a specialized machine, open up a job, work on extremely adverse grades and on soft ground conditions - Answers tandem powered scraper not designed to be push loaders, use a ladder to lift material into the bowl. however the ladder is dead weight during the haul cycle. used for utility work, good in small quantity situations. no pusher is required. they cannot handle rocky material - Answers elevating scrapers self loading scrapers that use a rotating auger to lift material in the bowl. available in single and double - Answers auger scraper has potential for high travel speeds on favorable roads - Answers push-loaded wheel scraper all wheel drive scrapers equipped with coupling devices that enable 2 scrapers to assist each other in loading - Answers push-pull tandem powered scrapers tandem powered scrapers sometimes require help - Answers loading suited for jobs where the haul-road rolling resistance is low and grades are minimal. they become uneconomical when haul grades are greater than 5% and return grades are greater than 12% - Answers single powered axle pusher-loader wheel-tractor scrapers heavier and more costly than conventional scrapers, can be economical in isolated work and for stripping materials - Answers self-loading scrapers expressed in bank cubic yards, approximated by multiplying the loose volume in the bowl by an appropriate swell factor - Answers the capacity of a scraper most common. it permits all scrapers to load in the same area. however, the slowest bc of the addition to pusher travel distance - Answers backtrack loading scraper fixed cycle time - Answers 1. spot time 2. load time 3. maneuver and dump time - good for short distance - can handle tight soil - can push large blade loads - exerts low ground bearing pressure - works on almost any terrain - can work on soft ground and mud slick surfaces - Answers crawler dozer (tracklaying) - the work horses of the construction industry - Answers crawler dozer 1. size and engine type (gas,diesel) 2. number of gears 3. drive type (2 wheel, 4wheel) 4. number of wheels and axles 5. method of dumping 6. material being hauled 7. holding capacity - Answers How to classify trucks distance is a major factor in selecting haul units - Answers trucks they are designed to provide high drawbar pull and tractive effort - Answers dozers exerts low ground-bearing pressure adding to its versatility - Answers crawler dozer equipped with a blade are standard equipment for excavating - Answers dozers equipped with special clearing blades are used for land clearing - Answers dozers equipped with push blades or blooms are used for assisting scrapers to load - Answers dozers can have a rear mounted ripper for loosing and breaking up rock - Answers dozers fill factor - Answers adjusts heaped capacity in lcy based on the type of material being hauled Management conditions: - skill, training, and motivation of workers - planning, job layout, supervision, and coordination of work Job conditions: - topography and work dimensions