Suppose you want to use one hydraulic hoe and a fleet of trucks on an excavation project. If you calculate the hydraulic hoe's loading cycle time at 2.5 minutes and the truck cycle time at 32.0 minutes, what is the minimum number of trucks that you would need if you wanted the hydraulic hoe to control production?

Suppose you want to use one hydraulic hoe and a fleet of trucks on an excavation project. If you calculate the hydraulic hoe's loading cycle time at 2.5 minutes and the truck cycle time at 32.0 minutes, what is the minimum number of trucks that you would need if you wanted the hydraulic hoe to control production?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Suppose you want to use a hydraulic hoe and a fleet of trucks on an excavation project. If you calculate the hydraulic hoe's loading cycle time at 2.0 minutes and the truck cycle time at 25.0 minutes, what is the minimum number of trucks that you would need if you wanted the hydraulic hoe to control production? Group of answer choices 12 12.5 13 50
Suppose you want to use one hydraulic hoe and a fleet of trucks on an excavation project. If you calculate the hydraulic hoe's loading cycle time at 2.5 minutes and the truck cycle time at 32.0 minutes, what is the minimum number of trucks that you would need if you wanted the hydraulic hoe to control production? Group of answer choices 80 12.8 13 29.5 12
7. 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?
A contractor plans to buy a backhoe machine for a construction project. The total useful hour of the machine is estimated to be 6 years with 9,000 hours of use. He estimates the unit cost to be $2.82/CY. If the backhoe has to excavate 2,000 CY of soil, what is the total cost for this operation? $5,640 $25,380 $54,000 $12,000
In a truck and shovel operation, the time for a truck to position itself at the shovel and be loaded are 0.50 minute and 3 minutes respectively. It then takes the truck 10 minutes to haul the ore, dump it at the coarse ore bin, and return to the shovel. How many trucks do you need to keep the shovel busy with a little waiting time for the trucks?
Based on the equipment prices given in Figure 10.1 and the crew described in Figure 10.5, calculate a price per cubic yard to strip topsoil from small areas when the expected productivity is 45 cubic yards per hour.
A project to move packed earth requires you to decide whether to use a dozer/scraper operation or excavator/truck operation. Determine the most economical operation based on the dozer/scraper operation estimated at $1.25/cy. All equipment carries a rated heaped capacity, has a fill factor of 100%, and works 45-min hours. Excavator costs $95/hr (including operator), cycle time is 0.28 min, and bucket heaped capacity is 5.0 cy. Truck costs $150/hr (including operator), dump time is 0.5 min (maneuver, dump, turn), heaped capacity is 31.7 cy, and 12 trucks are available for the project. Hauling equipment operates in one direction from A to B to C and finally to D. Section ABCD Load full full empty empty Length (ft) 3,000 2,500 3,000 3,000 Speed (mph) 9 17 36 16
A constructor has two subcontractors for his excavation work. Experience shows that in 60% of the time, subcontructor was available to do a job, whereas subcontractor B was available 80% of the time. Suppose Ea denotes the event that subcontractor A is available, ans Eb denotes that subcontractor B is available.a. Are Ea and Eb statistically independent? Explainb.Are Ea and Eb mutually exhaustive? Explainc.Are Ea and Eb collectively exhaustive? Explain
A project consists of replacing the track on an existing railroad line, involving 3,000 feet oftrack. The old track can be removed at a rate of 70 feet per hour. The old railroad ties can beremoved at a rate of 200 feet (measured along the track) per hour. The new ties can be installedat a rate of 25 feet per hour and the replacement track can be installed at a rate of 40 feet perhour. Show this operation on a linear schedule. Assume that the minimum float for an activity atany location is one day
A 5.55 mtpa LNG plant is being built in Pennsylvania in 2026. A similar plant built in Louisiana in 2014, with a 7.75 mtpa at a cost of $4.35 billion. Use an e factor of 0.80 Adjustments are as follows: The Pennsylvania plant requires $1.2 billion in rock blasting not required in Louisiana. The Louisiana plant will have an extra LNG tank that won’t be at the Pennsylvania plant that costs $688 millon. The project expects an escalation of 3.30 from 2014 to 2026. Do the CFE calculation after the adjustment.
Given the following Mass-Haul Diagram: Mass Diagram 5000 4000 3,500 3000 2,100 6.0 2,100 7.0 2000 8.0 1,500 1,500 a 8.0 1000 -1,100 7.1 6.0 750 5.0 -1000 3-2000 -3000 -3,000 -4000 -5000 10 15 20 25 Stations Limit of free haul = 600 ft Price of excavation = $3.50 Price of borrow = $3.75 Overhaul = $1.50 What is the total excavation cost to the nearest dollar? Net Cumulative Yardage
An excavator bucket has a heaped capacity of 6.2 CY and a bucket fill factor of 0.85. What is the bucket capacity?a. 5.35 CY b. 6.1 CY c. 7.3 CY d. 5.27 CY