Civil Engineering MCQAE Level Civil Engineering
A bulldozer pushes material over a 100 m distance at 1.5 km/hr and returns at 3.0 km/hr. Neglecting fixed delays, the number of productive cycles per hour is approximately:
Construction ManagementConstruction EquipmentMEDIUM
Choose the correct answer
A
5
B
8
C
10
D
15
Correct Answer
C. 10
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Push time = 100m ÷ 1500 m/hr = 0.0667 hr = 4 min. Return time = 100m ÷ 3000 m/hr = 0.0333 hr = 2 min. Cycle time = 4 + 2 = 6 min. Cycles/hr = 60/6 = 10. In practice, efficiency factor (≈0.83) reduces this to ~8.3 productive cycles.
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