PERT technique of network analysis is mainly useful for

Select the correct statement.

Which of the following is a weakness of bar chart ?

Which of the following is not a PERT event ?

In PERT analysis, the time estimates of activities and probability of their occurrence follow

The area under the Beta – distribution curve is divided into two equal parts by

According to Fulkerson’s rule, what are the correct event numbers corresponding to events A, B, C, D,E, F and G of the network shown in Fig. ? Fig.7.2

Which of the following does not represent an activity?

Earliest finish of an activity is always

Select the incorrect statement.

In the network shown in Fig. the earliest start time of activity 5-6 is (the number on the arrow shows duration of the activity)

In the network shown in Fig. (15 fig) the latest start time of an activity 4-5 is

In the network shown in Fig. 7.5, the activity 6-8 can be started only when

If an activity has its optimistic, most likely and pessimistic times as 2, 3 and 7 respectively, then its expected time and variance are respectively

Select the incorrect statement.

Free float is mainly used to

Whenever an activity has zero total float, then

Total float for any activity is defined as the difference between

In the network shown in Fig. independent float for the activity 3-5 will be (the number on the arrow shows the duration of activity)

Select the incorrect statement.

Free float for any activity is defined as the difference between

Critical path

The independent float affects only

A father notes that when his teenage daughter uses the telephone, she takes not less than 6 minutes for a call and som? times as much as an hour. Fifteen minutes call are more frequent than calls of any other duration. If these phone calls were an activity in PERT project, then phone calls expected duration will be

What estimate would you give for the variance in above problem ?

The time by which a particular activity can be delayed without affecting the preceding and succeeding activities is known as

The time with which direct cost does not reduce with the increase in time is known as

The time corresponding to minimum total project cost is

The direct cost of a project with respect to normal time is

The reduction in project time normally results in

Economic saving of time results by crashing

The process of incorporating changes and rescheduling or replanning is called

Slack time refers to

The normal time required for the completion of project in the above problem is

The constraints in case of resource smoothening operation would be

Updating may result in

Crash project duration is obtained by summing the

Interfering float is the difference between

Assertion (A): Activity 5-7 is critical. eason (R) : Earliest finish time and latest finish time for events 5-7 are same Select the correct answer.

A tractor whose weight is 20 tonnes has a drawbar pull of 2500 kg, when operated on a level road having a rolling resistence 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

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

Which of the following excavators is most suitable for digging under water?

The part of a derrick crane include (i) Mast (ii) Boom (iii) Bull wheel (iv) Jack Of these statements

For which of the following materials, the output of power shovels for a fixed shovel size will be maximum

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

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. Of these statements

Assertion A: For a given depth of cut, the output of a power shovel can be increased by decreasing the angle of swing. eason R: If the angle of swing is decreased, the cycle time will be decreased. elect the correct answer.

If the output of a dragline for 90° angle of swing at optimum depth of cut is X, then the output for 120° angle of swing at 120 % of optimum depth of cut will be

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 machine is purchased for Rs. 10,000,00/- and has an estimated life of 10 years. The salvage value at the end of 10 years is Rs. 1,50,000/-. The book value of the machine at the end of 5 years using general straight line method of evaluation of depreciation is

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

If the excavation of earth is done manually then it costs Rs. 10 per cum. A machine can excavate at a fixed cost of Rs. 4000 plus a variable cost of Rs. 2 per cum. The quantity of earth for which the cost of excavation by machine will be equal to the cost of manual excavation is

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

Rolling resistance of a wheel depends upon i) Vehicle load ii) Grade iii) Ground conditions Of these statements

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

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

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

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

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

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 ?

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

The probability of completion of any activity within its expected time is

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

If the expected time for completion of a project is 10 days with a standard deviation of 2 days, the expected time of completion of the project with 99.9% probability is

If the expected time of completion of a project is 60 weeks with a standard deviation of 5 weeks, the probability of completing the project in 50 weeks and 65 weeks respectively will be

A tractor shovel has a purchase price of Rs. 4.7 lacs and could save the organization an amount of rupees one lac per year on operating costs. The salvage value after the amortization period is 10% of the purchase price. The capital recovery period will be

Consider the following statements: n the bar chart planning . interdependence of the operations cannot be portrayed. . progress of work can be measured. . spare time of the activities can be determined. . schedule cannot be updated. f these statements

Consider the following statements : n the critical path method of construction planning, Free Float can be. . greater than Total Float. . greater than Independent Float . equal to Total Float. . less than Independent Float. Of these statements

In time-cost optimization of a project, crashing is done.

During the construction period, price variation clause in contracts caters to

At a work site, statistical quality control of concrete means

In India, are prefabricated components costlier than those of traditional cast-in-situ items that the prefabricated components replace?

Mobilization advance up to 10% of the cost of work is given to a contractor

Sinking fund is

A contractor has two options;© : Invest his money in project A or (II) : Invest his money in project 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

In resources levelling

The original cost of an equipment is Rs.10,000/-. Its salvage value at the end of its total useful life of five years is Rs. 1,000/-. Its book value at the end of two years of its useful life (as per straight line method of evaluation of depreciation) will be

Consider the following features/factors : . Projects are of the non-repetitive type. . Time required need not be known. . Time required is known precisely. . Events have been established for planning. . Emphasis is given to activities of project. ERT is preferred for planning because of

Consider the following activities in a building construction: . Concreting of roof slabs . Brick-jelly lime concrete terracing . Erection of form work for slab . Construction of parapet wall in terrace he correct sequence of these activities is

Consider the following operations : . Drilling . Blasting . Mucking . Placing steel . Placing concrete he correct sequence of these operations in tunnel construction is

For a given activity, the optimistic time, pessimistic time and the most probable estimates are 5, 17 and 8 days respectively, The expected time is

The maximum rimpull in the first gear of a tractor while towing a load is 6300 kg. The tractor weighs 12.5 tonnes and is operating along a 2 percent upgrade and the rolling resistance is 45 kg/tonne. Pull available for towing the load is

Grader is used mainly for

Which one of the following is not an excavating and moving type of equipment ?

The most suitable type of equipment for compaction of cohesive soils is

For excavating utility trenches with precise control of depth, the excavation equipment used is

The basic action involved in sheep foot rolling is

Batching refers to

Consider the following statements: heeled tractors are replacing crawler tractors because . wheeled tractors travel faster. . crawler tractors are more expensive. . track parts of a crawler wear out quickly. . crawler tractors have stick control. f these statements

The rated loads of lifting cranes, as percentage of tipping load at specified radius, for crawler-mounted, and pneumatic tyremounted machines would be respectively

Sensitivity analysis is a study of

In the time-cost optimisation, using CPM method for network analysis, the crashing of the activities along the critical path is done starting with the activity having

Preliminary project report for a road project must contain