Question 1 (100 points) Use the performance curve shown in Figure 4-3 to calculate the travel time of a single engine scraper based on the following information for the haul route: Section Distance (ft) Grade (%) RR (b/ton) u 1 1200 -3 100 2 4000 +1 150 3 500 0 200 Enter the travel time in the order of: Haul - Section 1 = Box 1 Haul - Section 2 = Box 2 Haul - Section 3 = Box 3 Return - Section 3 = Box 4 Return - Section 2 = Box 5 Return - Section 1 Box 6 Gross weight 100 o 50 350 Return - Section 1 : Box 6 Gross weight SO 100 150 kg x 1000 40 10 120 160 200 320 360 400 240 30% N/ 280 25% lb x 1000 75,000 lb 134 000 kg LOAD Empty 20% go TON Elective grade Fisvorable) th gear Sth gear 009 20 32 Js 40 10 20 25 30 35 40 50 70 Speed ta: Attempt 1 12 16 20 24 26 32 36 40 10 15 mph to km/h 20 25 30 35 40 45 50 55 80 65 70 Speed Table 4-3. Average speed factors Length of Haul Section 11 m Increasing Maximum Speed from Previous Section Decreasing Maximum Speed from Previous Section 46 Starting from O or Coming to a Stop 0.42 0.51 0.57 0.53 61 150 200 300 400 500 700 92 0.72 OR BOX 0 1.60 1457 39 122 1:33 153 3.55 1:29 0.70 04 1000 305 19 15 393 12 108 105 104 Ons 1625 Question 1 (100 points) Use the performance curve shown in Figure 4-3 to calculate the travel time of a single engine scraper based on the following information for the haul route: Section Distance (ft) Grade (%) RR (b/ton) u 1 1200 -3 100 2 4000 +1 150 3 500 0 200 Enter the travel time in the order of: Haul - Section 1 = Box 1 Haul - Section 2 = Box 2 Haul - Section 3 = Box 3 Return - Section 3 = Box 4 Return - Section 2 = Box 5 Return - Section 1 Box 6 Gross weight 100 o 50 350 Return - Section 1 : Box 6 Gross weight SO 100 150 kg x 1000 40 10 120 160 200 320 360 400 240 30% N/ 280 25% lb x 1000 75,000 lb 134 000 kg LOAD Empty 20% go TON Elective grade Fisvorable) th gear Sth gear 009 20 32 Js 40 10 20 25 30 35 40 50 70 Speed ta: Attempt 1 12 16 20 24 26 32 36 40 10 15 mph to km/h 20 25 30 35 40 45 50 55 80 65 70 Speed Table 4-3. Average speed factors Length of Haul Section 11 m Increasing Maximum Speed from Previous Section Decreasing Maximum Speed from Previous Section 46 Starting from O or Coming to a Stop 0.42 0.51 0.57 0.53 61 150 200 300 400 500 700 92 0.72 OR BOX 0 1.60 1457 39 122 1:33 153 3.55 1:29 0.70 04 1000 305 19 15 393 12 108 105 104 Ons 1625