An excavator was able to load a truck in 2 minutes and additional 30 seconds for the positioning of the truck. The hauling time, dumping time, and return time of the truck is about 25mins. What is the equipment utilization of the excavator if there are only eight trucks available during the loading operations?
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An excavator was able to load a truck in 2 minutes and additional 30 seconds for the positioning of the truck. The hauling time, dumping time, and return time of the truck is about 25mins. What is the equipment utilization of the excavator if there are only eight trucks available during the loading operations?
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- Evaluate cost and production using a 3-cy hoe to load wet gravel into 14-cy-size trucks. Assume a bucket fill factor of 105% and that the hoe bucket swing cycle time is 24 sec. Use the information in table below, a truck net empty weight of 36,860 lb, and a rated payload of 40,000 lb. Dump time will be 1.3 min. The haul distance is 2.5 miles from the pit to the plant up a 3% grade. The rolling resistance of the haul road will be maintained at 3%. The hoe and operator cost $97 per hour, and trucks cost $49 per hour. Assume the efficiency is 60min/hr. What is the truck cycle time? What is the loader cycle time? What is the number of trucks? What is the production of the truck, if you know that the loader will control that production? What is the total cost in dollars $ and in ($/lcy)? Total resistance% Speed(mph) 0 35 2 35 4 22.5 6 12.5 8 7A loader operating at 107 cy/hr has 2.5-cy heaped capacity bucket and has a 1.2-min load cycle. The trucks have 11-cy capacity and a 30-minute dump + haul + return time. A 95% fill factor applies to the loader. The project works 50-minute hours. Determine the job production for 7 trucks. A 94.70 cy/hr B 95.55 cy/hr C 93.70 cy/hr D 96.70 cy/hr7. A hydraulic shovel will be used to excavate sandy clay and load it into a 12 BCY dump truck. The shovel production at 100% efficiency is estimated to be 300 BCY/hour and job efficiency is 0.80. Truck travel time is estimated to be 8.0 minutes and truck fixed cycle time (excluding loading) is estimated to be 2.0 minutes. Equipment costs for the shovel and trucks are $40/h (shovel) and $20/h (truck). A. How many trucks are theoretically required to obtain maximum production? B. What is the expected production of the system in banked measure using this number of trucks? C. What is the expected unit loading and hauling costs in $/BCY?
- It is determined that a 5-m width-of-cut combine is traveling 1.5-m/s. In one minute’s time 50 kg of grain are collected in the grain tank and 60kg of material are discharged out of the rear of the machine. Find the machine capacities: field capacity, (ha/hr) material capacity (kg/hr), throughput capacity, (ton/hr)A crawler dozer with (3.2 x 1 y) blade will be used in dozing operation. The martial is a dry Gravel and is to be moved a distance of (300 ft) with a pushing speed of (3 Km/h) and returning speed of (8 Km/h); the job efficiency is assumed to be 45 min/hr. Calculate the cost of moving bank cubic yard if the O&O cost of the dozer is (65 $/h) and the operator wage is (15 $/h). assume the maneuver time is equal to (0.35 min)?Estimate the hourly production of a 4 CY wheel loader moving sand and gravel a distance of 150 feet up a 5% grade. The surface of the haul is loose sand and gravel. The job efficiency is 45 minutes per hour.
- Calculate number of transit mixers (TM) required for transporting concrete from central batching plant to site. The cycle time data of a 6 m³ typical transit mixers is given below: O Loading time of TM = 6.0 minutes. O Travel time of loaded TM to site= 30 minutes. Average waiting time at site = 5.0 minutes Discharge time of concrete at site through concrete pump = 15 minutes. Travel time for return trip = 24 minutes. If the central batching plant having average output of 60 m³/hr is to run continuously, work out the requirement of no. of concrete pumps and TM.do not solve it wrong, uploading for the second time, need detailed solutionCalculate the total operation time for this construction activity if the volume of soil to be removed is 8 cu.m. (considered 33% for bulking of materials.) The speed of dumptruck is 30 kph and travel distance (round trip) from the source to disposal area vice-versa is 6 km. The bucket size of excavator is 0.50 cu.m at 0.50 min loading time, tipping time is 4 mins. a. 15.18 minutes b. 22.02 minutes c. 25.32 minutes d. 30.00 minutes
- a) 200-ton, nominal rating crawler-mounted crane with 180 ft of boom has a radius of 60 ft what is the lifting capacity? b) What is the travel time for a scraper moving at 21 mph over a distance of 0.587 mile?A mass haul diagram developed of a section of a road construction project is shown below. 1000 500 200 400 600 800 1000 -500 -1000 -1500 Distance along centerline (m) For this roadway section, determine the following values: i. The total cut volume m3 ii. The total fill volume m3 iii. The total waste volume m3 iv. The total borrow volume m² 3 Cumulative volume (BCM)Assume two truckloads, 5.59 hours of actual collection per day, the truck be if it has a compaction ratio of 3.5:1, and pickup vehicie averages 5 mph between stops that are on the average separated by 150 feet. Each stop collects from two households that each put out two full 30-gallon (4.9 cubic feet) containers. it takes an average of 29 seconds to empty one container. What is the time required to serve each stop in seconds?