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A pumping station in a mine has 4 pumps, P1, P2, P3 and P4 which are connected functionally in parallel configuration as shown in the figure. The individual reliability of the pumps P1, P2, P3 and P4 are 0.80, 0.90, 0.85 and 0.95 respectively. For an effective dewatering operation in the mine denoting system success, at least three pumps should be in operation. The reliability of the system is
Mine System Engineering mcq question image
A bunker-conveyor system as shown in the figure works under the following scheme:
i. Bunker and two conveyors running
ii. Bunker and either of the two conveyors running
If the bunker and the two conveyors have identical reliability of 0.9. the system reliability is
Mine System Engineering mcq question image
The feasible region of an LP problem is shown as given below. The maximum value of the objective function Z = 1600X1 + 1200X2 is
Mine System Engineering mcq question image
In an opencast mine shown in the figure below, the coal has a density of 1.4 t/m3. Assuming mining operation started from plane XY, the operating stripping ratio under the given conditions in m3/t is
Introduction to Mining Engineering mcq question image
The failure data analysis of a longwall mining system consisting of thre major subsystems revealed that the failure rate of shearer, face conveyor any stage loader are 0.15/ hour, 0.2/ hour and 0.1/ hour respectively. If all the subsystems must be running for a satisfactory system operation, the reliability of the longwall system for a period of 4 hours is
A project network comprises five activities as shown below. The activity durations. in days. are as indicated. Crashing of any activity costs Rs. 1000 per day. If the project is crashed to the shortest possible duration without changing the critical path the total crashing coso in Rs. is
Mine System Engineering mcq question image
Four mines A, B, C and D are located along a road as shown with production in Mt per year 1, 2, 1 and 3 respectively. In order to handle total coal produced. the ideal distance of a coal washery along the road from the mine A in Km is
Mine System Engineering mcq question image
The figure of a solid marked 'X' is given below followed by four alternatives 1, 2, 3 and 4. If the solid is viewed in the direction of the arrow, which one of the four alternatives will represent the true view?
Figure Formation and Analysis mcq question image
The force induced in the string BC due to the load 'W' as shown in the below figure is
Engineering Mechanics mcq question image
Two blocks ‘A’ and ‘B’ of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.
Engineering Mechanics mcq question image