Question #4: A wheel-tractor scraper is operating on a level grade. Assume no power derating is required for equipment condition, altitude, temperature, and so on. Disregarding traction limitations, what is the maximum value of rolling resistance (in pounds per ton) over which a loaded scraper can maintain a speed of 20 mph? Use the scraper specifications in Table 8.1 and the performance charts in Figures 8.8 and 8.9.

Question #4: A wheel-tractor scraper is operating on a level grade. Assume no power derating is required for equipment condition, altitude, temperature, and so on. Disregarding traction limitations, what is the maximum value of rolling resistance (in pounds per ton) over which a loaded scraper can maintain a speed of 20 mph? Use the scraper specifications in Table 8.1 and the performance charts in Figures 8.8 and 8.9.

Construction Materials, Methods and Techniques (MindTap Course List)

4th Edition

ISBN:9781305086272

Author:William P. Spence, Eva Kultermann

Publisher:William P. Spence, Eva Kultermann

Chapter37: Conveying Systems

Section: Chapter Questions

Problem 9RQ

See similar textbooks

Similar questions

A fully loaded CAT 621K scraper is operated in fifth gear at its full rated rpm. Ambient air temperature is 60°F and the altitude is approximately sea level. The scraper is climbing a uniform 4% slope with a rolling resistance of 70 lb/ton and the pneumatic-tire scraper bowl is fully loaded with fill material. a. What is the operating weight of the empty scraper in pounds? b. What is the rated load in pounds for this scraper? c. What portion, in pounds and percent, of the fully loaded weight is carried by the front axle? d. What portion, in pounds and percent of the fully loaded weight is carried by the rear axle (the axle of the bowl)? e. What is the speed of the scraper in mph when operated in fifth gear (forward)? f. At what net horsepower does the manufacturer rate the tractive effort of the scraper for the environmental conditions described and operating in fifth gear?
Please refer to Double RC beam and we based on NSCP 2015 (current reference in the design of RC struct) Thank you.. Need this rush atleast 45 mins thank you so much hope you help me.
Chapter 7- DOZER PRODUCTION A track-type dozer equipped with a power shift can push an average blade load of 6 lcy. The material being pushed is silty sand. The average push distance is 88 ft. What production, in loose cubic yards (Icy), can be expected? Push time: 3 mph average speed (sandy material): distance (ft) Push time = X 60min/hr = . min 5280 ft/mi speed (mph) Return time: Second gear because less than 100 ft. Maximum speed 5 mph: distance (ft) T. Return time = X 50min/hr = min 5280 ft/mi speed (mph) The dozer must accelerate to attain the maximum velocity. Therefore, when using such speed data, it is always necessary to make an allowance for acceleration time. Because, in this example, the change in speed is very small, an allowance of 0.05 min is made for acceleration time. Return time = -0.05 = min Maneuver time 0.05 min Using Equation [7.4], pg.195 determine the production 60 min x blade load [Eq. 7.4] = push time (min +return rimeimin +manexar rime imin
- 1 attachment - 6. A construction lift is rising with a velocity of 2.5 m/s when a bag of cenent isv released. If the height at the time of release is 160 m, how long does it take the bag of cement to reach the ground? What is the velocity of impact?
Q_24. Refer to Table 12.6 and Figure 12.12 attached. What would be the fatigue damage according to the PCA design method for 50,000 repetitions of a 26-kip single axle, a subgrade k=200 psi/in, a flexural strength=600 psi, and a 6.5-inch thick concrete slab without concrete shoulders? Select the best answer.a. 0.0b. 0.5c. 0.75d. 10.0 Q_25. Refer to Table 12.8 and Figure 12.13 attached. What would be the erosion damage according to the PCA design method for the same conditions stated in Question 24 above? Select the best answer.a. 0.0b. 0.125c. 0.835d. 10.0
Problem A 3.34. Determine the magnitude and location of the resultant for the load system shown 100 Tb I -8-0 7000lb f 200 15/FE -8-0" II >
Fill in the blanks a) b) - 1 attachment 6. A construction lift is rising with a velocity of 2.5 m/s when a bag of cement isv released. If the height at the time of release is 160 m, how long does it take the bag of cement to reach the ground? What is the velocity of impact?
Load Balancing Method
Compute the load diagram
Consider a column which is subjected to a compressive load. A probable failure will be by buckling. Discuss which factors influence the value of the critical load for buck ?
2. Dozer Production Calculation How long will it take for a track-type dozer w/straight blade to move 1,000 bcy's of dry earth 100 feet? Assume average blade load of 5 lcy Forward travel @ 2.5 mph Reverse travel @ 3 mph Assume maneuver time about 0.05 min Work 45-min/hour
Class Prep Problem • Will the following crane tip over if it is picking up 7 kips? • The weight of the right axle is 3 kips and the weight of the left axle is 8 kips. 10 LOAD 45 Prove with calculations