Assertion (A): Activity 57 is critical. Reason (R): Earliest finish time and latest finish time for events 57 are same Select the correct answer.
A is correct but R is not correct
R is correct but A is not correct
Both A and R is correct
Both A and R is incorrect
Correct Answer :
A. A is correct but R is not correct
Related Questions
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
(ii), (iii) and (iv) are correct
(i), (ii) and (iv) are correct
(i), (iii) and (iv) are correct
(i) and (iv) are correct
Time and progress chart of a construction, is also known as
Bar chart
Gantt chart
Modified Mile stone chart
All the above
Mobilization advance up to 10% of the cost of work is given to a contractor
On commencement of work at site for payment of loan taken by him
For the purchase of construction materials
For the payment of advances to labour and other staff
For all activities required to start the work at site on finalization of the contract document
For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is
1
2
3
4
Which of the following surfaces will give highest rolling resistance for a rubber tyred vehicle?
Concrete
Loose sand
Asphalt
Firm earth
Sinking fund is
The fund for rebuilding a structure when its economic life is over
Raised to meet maintenance costs
The total sum to be paid to the municipal authorities by the tenants
A part of the money kept in reserve for providing additional structures and structural modifications
The direct cost of a project with respect to normal time is
Minimum
Maximum
Zero
Infinite
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
2.3% and 84.1%
97.7% and 84.1%
97.7 % and 15.9%
15.9% and 97.7%
If to, tp and tm are the optimistic, pessimistic and most likely time estimates of an activity respectively, the expected time t of the activity will be
to + 3tm+ tp/3
to + 4tm+ tp/4
to + 4tm+ tp/5
to + 4tm+ tp/6
Construction team means
An engineer
An architect
An owner
All the above
Economic saving of time results by crashing
Cheapest critical activity
Cheapest noncritical activity
Costliest critical activity
Costliest noncritical activity
Military organisation is known as
Line organisation
Line and staff organisation
Functional organisation
None of these
The constraints in case of resource smoothening operation would be
Resources
Project duration time
Both resources and project duration time
None of the above
The final selection of a construction site, is done by
Departmental representative or user
Local civil authority representative
Representative of engineer authority
All the above
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
8 days
9 days
10 days
15 days
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
Longest duration
Highest cost slope
Least cost slope
Shortest duration
Final technical authority of a project lies with
Assistant Engineer
Executive Engineer
Superintending Engineer
Chief Engineer
A dummy activity
Is artificially introduced
Is represented by a dotted line
Does not consume time
All the above
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
(i) and (iii) are correct
(i) and (iv) are correct
(ii) and (iii) are correct
(ii) and (iv) are correct
If D is the duration, ES and EF are the earliest start and finish, LS and LF are latest start and latest finish time, then the following relation holds good
EF = ES + D
LS = LF - D
LF = LS + D
All the above
The main disadvantage of line organisation, is
Rigid structure
Extraordinary delay in communications
Top level executions over work
All the above
Henry Gantt developed Bar charts for planning and scheduling of projects in
1880
1900
1920
1940
Pick up the correct statement from the following:
Programme Evaluation and Review Technique, is event oriented
Programme Evaluation and Review Technique is not event oriented
Critical Path Method is event oriented
Critical Path method is event oriented
In the given figure, the network of a project represents
Activity of an excavation of a footing
Activity of an excavation which starts at event No. 1 and ends at even No. 2
Activity of excavation which takes 8 units of time
None of these
The most popular type of organisation used for Civil Engineering Constructions, is
Line organisation
Line and staff organisation
Functional organisation
Effective organisation
Railway projects are treated as
Light construction
Heavy construction
Industrial construction
None of these
The probability of completion of any activity within its expected time is
50 %
84.1 %
99.9 %
100 %
Select the correct statement.
Activity arrows in a CPM network are drawn to scale
The tail of an arrow represents the finish of an activity
Arrow bead represents the start of an activity
None of the above
PERT is
An analytic in concept
Limited of event oriented diagrams
Used for research and development projects
All the above
Which of the following excavators is most suitable for digging under water?
Drag line
Hoe
Clam shell
Dipper shovel