911. Which of the following earth moving machines has the shortest cycle time?
A. Drag line
B. Hoe
C. Clam shell
D. Dipper shovel
✅ The correct answer is option D.
Civil Engineering
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912. If the optimistic time, most likely time and pessimistic time for activity A are 4, 6 and 8 respectively and for activity B are 5, 5.5 and 9 respectively, then______________?
A. expected time of activity A is greater than the expected time of activity B
B. expected time of activity B is greater than the expected time of activity A
C. expected time of both activities A and B are same
D. none of the above
✅ The correct answer is option C.
913. Earliest finish of an activity is always_______________?
A. greater than earliest event time of the following node
B. less than earliest event time of the following node
C. less than or equal to earliest event time of the following node
D. greater than or equal to earliest event time of the following node
✅ The correct answer is option C.
914. Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors?
A. Ice
B. Concrete
C. Loose sand
D. Earth
✅ The correct answer is option D.
915. 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__________________?
A. 30 kg
B. 300 kg
C. 900 kg
D. 1000 kg
✅ The correct answer is option C.
916. 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________________?
A. longest duration
B. highest cost slope
C. least cost slope
D. shortest duration
✅ The correct answer is option C.
917. For a given size of bucket, the ideal output of a dragline will be least in_______________?
A. Moist loam
B. Sand and gravel
C. Good common earth
D. Wet sticky clay
✅ The correct answer is option D.
918. PERT technique of network analysis is mainly useful for__________________?
A. small projects
B. large and complex projects
C. research and development projects
D. deterministic activities
✅ The correct answer is option C.
919. In PERT analysis, the time estimates of activities and probability of their occurrence follow_______________?
A. normal distribution curve
B. Poisson’s distribution curve
C. Beta – distribution curve
D. none of the above
✅ The correct answer is option C.
920. The time by which a particular activity can be delayed without affecting the preceding and succeeding activities is known as_______________?
A. total float
B. free float
C. interfering float
D. independent float
✅ The correct answer is option D.