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.
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
Correct Answer :
A. Both A and R is true and R is the correct explanation of A
Related Questions
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?
Rs. 31050
Rs. 34500
Rs. 37950
Rs. 50000
Which one of the following represents an activity?
Excavation for foundation
Curing of concrete
Setting of question paper
All the above
If a is the optimistic time, b is the pessimistic time and m is most likely time of an activity, the expected time of the activity, is
(a + m + b)/6
(a + 2m + b)/6
(a + 4m + b)/6
(a + 5m + b)/6
Site order book is used for recording
Instructions by the executive engineers
Construction measurements
Issue of store equipments
Names of the casual labour
Grader is used mainly for
Trimming and finishing
Shaping and trimming
Finishing and shaping
Finishing, shaping and trimming
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
For a given size of bucket, the ideal output of a dragline will be least in
Moist loam
Sand and gravel
Good common earth
Wet sticky clay
A construction schedule is prepared after collecting
Number of operations
Output of labour
Output of machinery
All the above
In India, are prefabricated components costlier than those of traditional cast-in-situ items that the prefabricated components replace?
Yes, because of heavier overheads and handling cost
Yes, because of the very high order of quality control for the factory made components
No, because of repetitive manufacture of a number of elements
No, because of savings in site labour
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
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
Reduce by 200 kg
Increase by 200 kg
Increase by 250 kg
Reduce by 250 kg
While scheduling a project by C.P.M.
A project is divided into various activities
Required time for each activity is established
Net work is drawn by connecting the activities and the events
All the above
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
10000 kg
12500 kg
22500 kg
5000 kg
Consider the following statements: In the critical path method of construction planning, Free Float can be.
1. Greater than Total Float.
2. Greater than Independent Float
3. Equal to Total Float.
4. Less than Independent Float. Of these statements
1 and 4 are correct
2 and 3 are correct
1 and 4 are correct
1 and 2 are correct
Sensitivity analysis is a study of
Comparison of profit and loss
Comparison of assets and liabilities
Change in output due to change in input
Economics of cost and benefits of the project
Earliest finish of an activity is always
Greater than earliest event time of the following node
Less than earliest event time of the following node
Less than or equal to earliest event time of the following node
Greater than or equal to earliest event time of the following node
If TL is the latest allowable event occurrence time, total activity slack(s), is equal to
LST-EST
LFT-EFT
TL-EFT
All the above
The process of incorporating changes and rescheduling or replanning is called
Resource levelling
Resource smoothening
Updating
Critical path scheduling
The artificial activity which indicates that an activity following it, cannot be started unless the preceding activity is complete, is known as
Event
Free float
Dummy
Constraint
Which of the following earth moving machines has the shortest cycle time?
Drag line
Hoe
Clam shell
Dipper shovel
Pick up the correct statement from the following:
CPM analysis is activity oriented
PERT analysis is event oriented
In CPM, the time is related to cost
All the above
Select the incorrect statement.
A critical path always begins at the very first event.
A critical path always terminates at the last event.
Critical activities control the project duration.
Critical activity is the one for which free float is zero.
During the construction period, price variation clause in contracts caters to
Increase in rates of only important materials
Variation in cost in materials element, labour element and petrol-oillubricant element
Variation in total cost of the project on an ad hoc basis
Rate of inflation
Optimistic time, most likely time and pessimistic times for the activities of a network in the given figure are written above their arrows. If the contractual obligation time for the project is 75, the latest occurrence time for the event 2, is
20
25
35
15
In resources levelling
Total duration of project is reduced
Total duration of project is increased
Uniform demand of resources is achieved
Cost of project is controlled
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
20 kg/tonne
30 kg/tonne
40 kg/tonne
50 kg/tonne
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
Rs. 1740
Rs. 3480
Rs. 5220
Rs. 6960
Pick up the correct statement from the following:
The float may be positive, zero or negative
If the float is positive and the activity is delayed by a period equal to its total float, the completion of project is not delayed
If the float of an activity is negative, delay in its performance is bound to delay the completion of project
All the above
Pick up the incorrect statement from the following:
The activity is the time consuming part of a project
The beginning and end of a job, are called events
The activity which consumes maximum time, is called a node
Logically and sequentially connected activities and events form a network
For the network shown in the given figure, the expected time for the activity
1-2 is 4
2-3 is 7
3-4 is 8
All the above