### Construction Planning and Management

11. A tractor whose weight is 20 tonnes has a drawbar pull of 2500 kg, when operated on a level road having a rolling resistance of 30 kg per tonne. If this tractor is operated on a level road having a rolling resistance of 40 kg per tonne, then the drawbar pull of the tractor will

1. Reduce by 200 kg
2. Increase by 200 kg
3. Increase by 250 kg
4. Reduce by 250 kg

Reduce by 200 kg

12. A wheeled tractor hauling unit is working on firm earth. The total loaded weight distribution of this unit is: Drive wheels: 25000 kg Scraper wheels: 10000 kg If the coefficient of traction for wheeled tractor on firm earth is 0.5, the rimpull which this tractor can exert without slipping is

1. 10000 kg
2. 12500 kg
3. 22500 kg
4. 5000 kg

12500 kg

13. An earth moving equipment costs Rs. 5,00,000 and has an estimated life of 10 years and a salvage value of Rs. 50,000. What uniform annual amount must be set aside at the end of each of the 10 years for replacement if the interest rate is 8% per annum and if the sinking fund factor at 8% per annum interest rate for 10 years is 0.069?

1. Rs. 31050
2. Rs. 34500
3. Rs. 37950
4. Rs. 50000

Rs. 31050

14. An event is indicated on the network by a number enclosed in

1. A circle
2. A square
3. A triangle
4. All the above

All the above

15. 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

1. Rs. 8,43,750
2. Rs. 8,75,000
3. Rs. 10,50,000
4. Rs. 11,56,250

Rs. 8,43,750

16. Assertion (A): Activity 57 is critical. Reason (R): Earliest finish time and latest finish time for events 57 are same Select the correct answer.

1. A is correct but R is not correct
2. R is correct but A is not correct
3. Both A and R is correct
4. Both A and R is incorrect

A is correct but R is not correct

17. 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. Select the correct answer.

1. Both A and R is true and R is the correct explanation of A
2. Both A and R is true but R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true

Both A and R is true and R is the correct explanation of A

18. At a work site, statistical quality control of concrete means

1. Measurement of risks to eliminate failures
2. Applying the theory' of probability to sample testing or inspection
3. Reduction in wastage of inspection costs
4. Reduction in costs for the removal of defects

Applying the theory' of probability to sample testing or inspection

19. B. If he decides to invest in A, for every rupee invested, he is assured of doubling his money in ten years. If he decides to invest in B, he is assured of making his money 1.5 times in 5 years. If the contractor values his money at 10% interest rate, he

1. Should invest in neither of the two projects
2. Could invest in either of the two projects
3. Should invest in project A
4. Should invest in project B