Construction Planning and Management
A four wheel truck or whose operating weight is 12000 kg is pulled along a road having a rising slope of 2% at a uniform speed. Assume grade resistance factor = 10 kg/tonne. The tension in the tow cable is 720 kg. The rolling resistance of the road will be

40 kg/tonne
30 kg/tonne
20 kg/tonne
50 kg/tonne

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Construction Planning and Management
Consider the following statements for a power shovel:
(i) Output can be increased by reducing the angle of swing for a given depth of cut.
(ii) For a given angle of swing, output will be maximum at optimum depth of cut.
(iii) Output can be increased by keeping the depth of cut less than optimum depth.
(iv) Output can be increased by increasing the size of shovel.

(i), (ii) and (iv) are correct
(ii), (iii) and (iv) are correct
(i), (iii) and (iv) are correct
(i) and (iv) are correct

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