Mining Engineering · all questions

Mine System Engineering
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

51

Questions

3/3

Page

Pick an option on a question to see the right answer and solution.

Q41

A company has three mines at locations A, B and C, which supply coal to power plants at D, E, F and G. Mines A, B and C produce 1800 t/day, 1700 t/day, and 2900 t/day respectively. Daily raw coal requirements at the power plants D, E, F and G from these mines are 2050 t, 1600 t, 1300 t, and 1450 t respectively. Unit transportation costs are as follows:

Mines ↓	Power Plants
Mines ↓	D	E	F	G
A	3.5	4.0	2.5	5.5
B	4.5	3.7	6.0	4.7
C	4.2	3.8	5.2	2.9

The company has to minimize the total cost of transportation to the power plants. The problem is

Select an option to see the answer and solution.

Q42

The three time estimates of PERT network are assumed to follow

Select an option to see the answer and solution.

Q43

A system consists of four elements A, B, C and D which are connectec functionally in a parallel configuration. The individual reliability of the elements is 0.80, 0.82, 0.85 and 0.90 respectively. The reliability of the system is

Select an option to see the answer and solution.

Q44

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

Mine System Engineering mcq question image

Select an option to see the answer and solution.

Q45

For an LP problem, identify the incorrect statement

Select an option to see the answer and solution.

Q46

A mining company has three mines (MI, M2 and M3) that supply coal to three power plants (P1, P2 and P3). The three mines produce 900. 1000 and 1200 te of coal per day respectively. The power plant requirements from these three mines are 1200. 1000 and 900 te per day respectively. The unit cost of transporting coal from the three mines to the three power plants in Rs. is given below

		Power Plants
		P1	P2	P3
Mines	M1	8	10	12
	M2	12	13	12
	M3	14	10	11

Based on the initial basic feasible solution, using Vogel's approximation method, the total transportation cost in Rs. is

Select an option to see the answer and solution.

Q47

In an opencast mine with shovel-dumper combination have 1 shovel and 6 dumpers. The reliability of the shovel is 0.9 and all the dumpers have equal reliability of 0.8. What is the system reliability?

Select an option to see the answer and solution.

Q48

Activity durations in PERT and CPM are decided on the following consideration

Select an option to see the answer and solution.

Q49

Three jobs A, B and C are to be assigned to three machines X, Y and Z. The processing costs are given below:

		Machines
		X	Y	Z
Job	A	19	28	31
	B	11	17	31
	C	12	15	13

The minimum total cost of assigning the jobs to the machines is.

Select an option to see the answer and solution.

Q50

A mining machinery company has four plants at locations A, B, C, and D and three warehouses at destinations X, Y and Z. The number of machine units available at the plants A, B, C and D are 5, 8, 7 and 14 respectively. The demands at X, Y and Z are 7, 9 and 18 respectively. The unit costs of transportation in rupees as follows:

	Destinations
		X	Y	Z
Locations	A	20	70	40
	B	30	30	10
	C	50	40	70
	D	10	60	20

The total cost of transportation in rupees based on the initial basic feasible solution obtained by the north-west corner rule is

Select an option to see the answer and solution.

Q51

The individual reliability values of four sub-systems are given in the figure below. The reliability of the system is
Mine System Engineering mcq question image

Mine System Engineering mcq question image

Select an option to see the answer and solution.