Civil Engineering MCQs

Page No. 124

Which of the following earth moving machines has the shortest cycle time?


aDrag line


bHoe


cClam shell


d Dipper shovel


View Answer Dipper shovel

For a given size of bucket, the ideal output of a dragline will be least in_______________?


aMoist loam


bSand and gravel


cGood common earth


dWet sticky clay


View Answer Wet sticky clay

Assertion A: For a given depth of cut, the output of a power shovel can be increased by decreasing the angle of swing Reason R: If the angle of swing is decreased, the cycle time will be decreased_______________?


aBoth A and R are true and R is the correct explanation of A


bBoth A and R are true but R is not the correct explanation of A


cA is true but R is false


d A is false but R is true



An excavator costs Rs. 20,00,000/- and has an estimated life of 8 years. It has no salvage value at the end of 8 years. The book value of the excavator at the end of 3 years using general double declining balance method is__________________?


aRs. 8,43,750/-


bRs. 8,75,000/-


cRs. 10,50,000/-


dRs. 11,56,250/-


View Answer Rs. 8,43,750/-

Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors?


aIce


bConcrete


cLoose sand


dEarth


View Answer Earth

Which of the following surfaces will give highest rolling resistance for a rubber tyred vehicle?


aConcrete


bLoose sand


cAsphalt


d Firm earth


View Answer Loose sand

The grade resistance factor for an earth moving machine can be obtained by multiplying grade percentage by a factor approximately equal to_________________?


a2 kg/tonne


b6 kg/tonne


c 9 kg/tonne


d20 kg/tonne


View Answer 9 kg/tonne

A four wheel trac*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___________________?


a20 kg/tonne


b 30 kg/tonne


c40 kg/tonne


d50 kg/tonne


View Answer 40 kg/tonne

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__________________?


a50%


bless than 50%


cmore than 50%


d100%


View Answer more than 50%

A machine costs Rs. 20000 and its useful life is 8 years. The money is borrowed at 8% interest per annum. The capital recovery factor at 8% interest per annum for 8 years is 0.174. The annual equipment cost of the machine will be________________?


aRs.1740


b Rs.3480


cRs.5220


dRs.6960


View Answer Rs.3480

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