Exam Bank for CM 2113- Questions with Verified Answers Graded A+

Exam Bank for CM 2113- Questions with Verified Answers Graded A+ Three basic components of soil are? - Answers Solids, Water & air For bulk materials, volumetric measure varies with the material's position in the construction process. - Answers True The same weight of a material will occupy different volumes as the material is handled on the project. - Answers True ________ is a reduction in density due to loosening the soil by digging. - Answers Swell Which of the following soil volume is used to determine the volume capacity of excavating and hauling equipment? - Answers Loose Volume Soil density is a measure of __________ per unit of volume. - Answers Weight A soil's bank condition is the typical amount of soil in its __________ state. - Answers Natural 1 bank cubic yard is 1 cubic yard of material after it has been disturbed by a loading process. - Answers False Construction cost estimates are based on the total quantity of the work to be performed multiplied by the ____________ of the work. - Answers Unit Price A contractor is planning to haul in the soil to construct a parking lot for a shopping center she is constructing. Density tests taken on the soil in its natural state (wet) indicate a unit weight of 101 pounds per cubic foot. The contractor heated a soil sample in an oven and determined the dry unit weight to be 96 pounds per cubic foot. What is the moisture content of the soil? - Answers 5.21% A contractor is planning to haul in the soil to construct a parking lot for a shopping center she is constructing. Density tests taken on the soil in its natural state (wet) indicate a unit weight of 101 pounds per cubic foot. The contractor heated a soil sample in an oven and determined the dry unit weight to be 96 pounds per cubic foot. To minimize the amount of compaction required to achieve the design density for the parking lot, the contractor wants to increase the moisture content to 10%. How many gallons of water should she add to each cubic yard of soil to increase the moisture content to 10%? (1 gallon of water weighs 8.34 pounds) - Answers 14.92 gal/cy A contractor plans to excavate 4,000 bank cubic yards from a site. He needs to have 1,000 compacted cubic yards for the backfill of excavations. The soil test shows that the soil has a bank density of 2,500 pounds per cubic yard, a loose density of 2,000 pounds per cubic yard, and a compacted density of 3,000 pounds per cubic yard. What is the percent shrinkage for the soil? - Answers 16.67% A contractor plans to excavate 4,000 bank cubic yards from a site. He needs to have 1,000 compacted cubic yards for the backfill of excavations. The soil test shows that the soil has a bank density of 2,500 pounds per cubic yard, a loose density of 2,000 pounds per cubic yard, and a compacted density of 3,000 pounds per cubic yard. How many bank cubic yards should be kept to be used for the backfill operation? - Answers 1,200 BCY A contractor plans to excavate 4,000 bank cubic yards from a site. He needs to have 1,000 compacted cubic yards for the backfill of excavations. The soil test shows that the soil has a bank density of 2,500 pounds per cubic yard, a loose density of 2,000 pounds per cubic yard, and a compacted density of 3,000 pounds per cubic yard. He plans to use a truck that can haul 25 loose cubic yard per load. How many full truckloads of loose excess material should be hauled off the site? - Answers 140 _______________ is the resistance of a level surface to constant-velocity motion across it, and it results from friction of the driving mechanism, tire flexing, and the force required to shear through or ride over the supporting surface. - Answers Rolling resistance Rolling resistance applies to both crawler-type and wheel-type of mobile equipment. - Answers True When a vehicle moves down a grade, the force of gravity that assists vehicle movement is also called grade assistance. - Answers True Power required, total resistance, and effective grade all denote the same thing. - Answers True The decision process for matching the best possible machine to the project task requires the engineer to take into account both the properties of the material to be handled and the mechanical capabilities of the machine. - Answers True The power to move a crawler type of tractor and load is called Rimpull. - Answers False _____________________ is a term that is used to designate the tractive force between the tires of a machine's driving wheels and the surface on which they travel. - Answers Rimpull The towing force a crawler tractor can exert on a load is referred to as ______________________. - Answers Drawbar pull A fully loaded wheeled scraper (Model #: 615C) must travel down a 3% slope on an unmaintained hard road (tire penetration is 5 inches and the coefficient of traction is estimated to be 0.45), and then return to the same location. Only the front tires of this scraper are powered, and you can obtain the following information from the manufacturer's data. -Empty vehicle weight: 97,000 lb