1. A contractor is planning to use a crawler tractor with power shift transmission to push...

1. A contractor is planning to use a crawler tractor with power shift transmission to push 1,500 LCY. The tractor must haul the loose material up a 12% slope where it will be stockpiled for later removal. The contractor has measured the tractor blade load measurement: the pile length 12.6 ft, the pile width 8.1 ft, and the pile height 4 ft. The tractor weighs 44,400 pounds, and the coefficient of traction is estimated to be 0.7. The average haul distance is estimated to be 300 ft. The job efficiency is 50 minutes per hour. Performance characteristics of the tractor are shown in the lecture slides. (Note: 1 mi/hr = 88 ft/min).

1) What is the estimated productivity of the tractor? (First gear for dozing; Third gear for return.)

2) Estimate the total hours to complete the work.

3) Determine if the tractor can perform the work in the given condition above.

Solutions

Expert Solution

Ally Wells answered 2 years ago

Next > < Previous

Related Solutions

A Power-shift crawler tractor is excavating tough clay and pushing it a distance of 21 m....

A Power-shift crawler tractor is excavating tough clay and pushing it a distance of 21 m. The rated blade capacity is 7.0 LCM. Maximum reverse speeds are as follows: first range, 4.8 Km/h; second range, 9.0 Km/h, third range, 12.2 Km/h. Estimate the dozer production if management conditions and job conditions are excellent and good respectively.

A CAT D&H (power-shift) dozer is used to push material that weights 87 pcf in the...

A CAT D&H (power-shift) dozer is used to push material that weights 87 pcf in the bank state. It is estimated that the material will swell 5% from a bank state. The material is in a loose stock pile and is to be moved an average distance of 250 ft on a 2% downhill grade. The operator is average. Job efficiency is estimated to be at a 50-min hour. Assume that the dozer will have an 0.39 coefficient of traction....

I am planning on purchasing a new Tractor, There are two machine choices, Tractor A and...

I am planning on purchasing a new Tractor, There are two machine choices, Tractor A and Tractor B. Tractor A will cost $175,000 and Tractor B will cost $275,000. Due to various uncertainties in manufacturing operations, the useful life of each machine is unknown, but the following probability estimates have been made. Useful life (years) Probability Machine A Machine B 15 0.15 0.25 25 0.25 0.45 35 0.45 0.20 45 0.15 0.10 A. Determine the expected life of each machine....

Explain the Fundamentals of power transmission.

Bumps Unlimited, a highway contractor, must decide whether to overhaul a tractor and scraper or replace...

Bumps Unlimited, a highway contractor, must decide whether to overhaul a tractor and scraper or replace it. The old equipment was purchased 5 years ago for $130,000; it had a 12- year projected life. If traded for a new tractor and scraper, it can be sold for $60,000. Overhauling the equipment will cost $20,000. If overhauled, O&M cost will be $25,000/year and salvage value will be negligible in 7 years. If replaced, a new tractor and scraper can be purchased...

A power company is preparing a bid to become the lead contractor on a nuclear power...

A power company is preparing a bid to become the lead contractor on a nuclear power plant in Japan. The plant will be part of a new generation of smaller-scale “pocket” power plants. It is estimated it will cost $2,620 million to construct and make operational — including all the design work, safety testing, hiring and training of staff, and equipment. It is expected to generate cash of about $390 million per year for 10 years, at which point it...

A power company is preparing a bid to become the lead contractor on a nuclear power...

A power company is preparing a bid to become the lead contractor on a nuclear power plant in Japan. The plant will be part of a new generation of smaller-scale “pocket” power plants. It is estimated it will cost $2,620 million to construct and make operational —including all the design work, safety testing, hiring and training of staff, and equipment. It is expected to generate cash of about $390 million per year for 10 years, at which point it will...

True or False 1. Shafts utilized for constant power transmission with no supported components may be...

True or False 1. Shafts utilized for constant power transmission with no supported components may be designed using static failure theory. 2. Slope and deflection of shafts are constrained to ensure proper functionality of the supported components 3. For a given bending moment loading and length, a shaft with smaller diameter will result in smaller angular deflection at the bearing supports. 4. For a shaft subjected to combined variable bending and constant torsional loading, the shaft diameter at the critical...

A contractor is planning to buy an office trailer for $28000.They intend to keep the...

A contractor is planning to buy an office trailer for $28000. They intend to keep the trailer for 5 years and expect that maintenance will remain at $950 per year over this period. The trailer is also subject to an annual tax which will be $55 at the end of the first year but is expected to increase by %20 each year after that.What is the equivalent annual cost of owning this trailer when the interest rate is 9%?

1. What factors shift the AD curve? What factors shift the AS curves? 2. Use the...

1. What factors shift the AD curve? What factors shift the AS curves? 2. Use the Income-Expenditure Model(I-E) and the AD-AS Model to determine the size and direction of any shifts that occur in the AEp line, rGDP demanded, and the AD curve for the following changes in spending (MPC=.9). Show all work, and illustrate your results graphically. a. $8 billion increase in investment spending. b. $5 billion decrease in government spending. c. $20 billion increase in autonomous consumption spending....

Subjects