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Construction Planning and Management - Interview Questions and Answers

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51. Output of a bulldozer is (i) increased if drawbar HP of the tractor is increased for a given hauling distance (ii) decreased if drawbar HP of the tractor is increased for a given hauling distance (iii) increased if the hauling distance is increased for a given drawbar HP of the tractor (iv) decreased if the hauling distance is increased for a given drawbar HP of the tractor Of these statement
A. (i) and (iii) are correct
B. (i) and (iv) are correct
C. (ii) and (iii) are correct
D. (ii) and (iv) are correct
Explanation:
52. Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors?
A. Ice
B. Concrete
C. Loose sand
D. Earth
Explanation:
53. If the scheduled completion time of a project is more than the earliest expected time for completion of the project, then the probability of completion of the project within the scheduled completion time will be
A. 50%
B. less than 50%
C. more than 50%
D. 100%
Explanation:
54. If the gross vehicle weight of a truck is 30 t and rolling resistance is 30 kg/tonne, then the tractive effort required to keep the truck moving at a uniform speed is
A. 30 kg
B. 300 kg
C. 900 kg
D. 1000 kg
Explanation:
55. In time-cost optimization of a project, crashing is done.
A. on all the activities
B. on all the activities lying on the critical path
C. only on activities lying on the orginal critical path and having flatter cost slopes
D. on original critical activities and those that become critical at any stage of crashing in the order of ascending cost slope
Explanation:
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