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A scraper of self weight 27 tonnes works on sandy clay soil weighing 1800 kg/m3 of bank measure. Haul road rolling resistance is 3.5% and grade is 2% adverse for loaded unit. The earth carried per trip is 14m3 (b.m.). What rim pull, in newton (approximately) is required when travelling loaded and empty, respectively?
  • a)
    35600,5100
  • b)
    32200,4800
  • c)
    30100,4400
  • d)
    28700,4050
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A scraper of self weight 27 tonnes works on sandy clay soil weighing 1...
When loaded the grade resistance will be 5.5% and when empty the grade resistance will be 1.5%.
Total resistance = roiling resistance + grade resistance.
When travelling loaded the weight

When travelling empty the weight = 27t
Thus rimpull
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Most Upvoted Answer
A scraper of self weight 27 tonnes works on sandy clay soil weighing 1...
Given data:
- Self weight of scraper = 27 tonnes = 27000 kg
- Density of sandy clay soil = 1800 kg/m3
- Haul road rolling resistance = 3.5%
- Grade = 2% adverse
- Earth carried per trip = 14 m3 (b.m.)

Calculating the weight of the earth:
Weight of the earth carried per trip = Volume of earth carried per trip x Density of soil
Weight of the earth carried per trip = 14 m3 x 1800 kg/m3
Weight of the earth carried per trip = 25200 kg

Calculating the resistance force:
Resistance force = Weight of the loaded unit x Rolling resistance
Resistance force = (27 tonnes x 9.81 m/s2) x (3.5% / 100)
Resistance force = 738.15 kN

Calculating the grade resistance:
Grade resistance = Weight of the loaded unit x Grade
Grade resistance = (27 tonnes x 9.81 m/s2) x (2% / 100)
Grade resistance = 52.82 kN

Calculating the total resistance force:
Total resistance force = Resistance force + Grade resistance
Total resistance force = 738.15 kN + 52.82 kN
Total resistance force = 790.97 kN

Calculating the rim pull:
Rim pull = Total resistance force + Weight of the loaded unit
Rim pull = 790.97 kN + 27000 kg x 9.81 m/s2
Rim pull = 790.97 kN + 264570 kN
Rim pull = 265360 kN

Calculating the rim pull when travelling empty:
Weight of the empty scraper = Self weight of scraper = 27000 kg
Rim pull when travelling empty = Weight of the empty scraper
Rim pull when travelling empty = 27000 kg x 9.81 m/s2
Rim pull when travelling empty = 264570 kN

Answer:
The rim pull required when travelling loaded is approximately 265360 kN and when travelling empty is approximately 264570 kN. Therefore, the correct answer is option 'D' (28700, 4050).
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A scraper of self weight 27 tonnes works on sandy clay soil weighing 1800 kg/m3 of bank measure. Haul road rolling resistance is 3.5% and grade is 2% adverse for loaded unit. The earth carried per trip is 14m3 (b.m.). What rim pull, in newton (approximately) is required when travelling loaded and empty, respectively?a)35600,5100b)32200,4800c)30100,4400d)28700,4050Correct answer is option 'D'. Can you explain this answer?
Question Description
A scraper of self weight 27 tonnes works on sandy clay soil weighing 1800 kg/m3 of bank measure. Haul road rolling resistance is 3.5% and grade is 2% adverse for loaded unit. The earth carried per trip is 14m3 (b.m.). What rim pull, in newton (approximately) is required when travelling loaded and empty, respectively?a)35600,5100b)32200,4800c)30100,4400d)28700,4050Correct answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A scraper of self weight 27 tonnes works on sandy clay soil weighing 1800 kg/m3 of bank measure. Haul road rolling resistance is 3.5% and grade is 2% adverse for loaded unit. The earth carried per trip is 14m3 (b.m.). What rim pull, in newton (approximately) is required when travelling loaded and empty, respectively?a)35600,5100b)32200,4800c)30100,4400d)28700,4050Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A scraper of self weight 27 tonnes works on sandy clay soil weighing 1800 kg/m3 of bank measure. Haul road rolling resistance is 3.5% and grade is 2% adverse for loaded unit. The earth carried per trip is 14m3 (b.m.). What rim pull, in newton (approximately) is required when travelling loaded and empty, respectively?a)35600,5100b)32200,4800c)30100,4400d)28700,4050Correct answer is option 'D'. Can you explain this answer?.
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