Mine System Engineering MCQs Questions & Answers

21

The time study data of an equipment deployed in a mine during a calendar month is given below.
Total working hours = 400
Total maintenance hours = 100
Total hours of actual work = 240
The percentage of utilization of the equipment is

A) 85 B) 80 C) 65 D) 60

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

22

In an opencast mine loading and transporting has been carried out by shovel dumper combination. There is only one shovel is in operation. Dumpers arrive at the rate of 10 dumpers per hour and it takes shovel on an average 5 minutes to load a dumper. Assume arrival is Poisson and service time is exponentially distributed. Find the expected number of dumpers in the system.

A) 2 B) 3 C) 4 D) 5

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

23

ISO 9000 Quality Systems DO NOT contain

A) Legal provisions B) Measurement C) Document control D) Standardization

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

24

The following project network is given with arrows as activities and the numbers by each arrow representing job durations in days. The network has two dummy activities D₁ and D₂. The minimum completion time of the project in days is
Mine System Engineering mcq question image

Mine System Engineering mcq question image

A) 13 B) 19 C) 75 D) 68

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

25

A balanced transportation problem is characterised by

A) Total supply exceeds total demand B) Total demand exceeds total supply C) Total demand is equal to total supply D) Total supply is either equal to or more than total demand

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

26

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

A) 20400 B) 20000 C) 19200 D) 16800

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

27

In an opencast mine loading and transporting has been carried out by shovel dumper combination. There is only one shovel is in operation. Dumpers arrive at the rate of 10 dumpers per hour and it takes shovel on an average 5 minutes to load a dumper. Assume arrival is Poisson and service time is exponentially distributed. Find the probability that the shovel is sitting idle.

A) $$\frac{1}{6}$$ B) $$\frac{1}{8}$$ C) $$\frac{1}{4}$$ D) $$\frac{1}{2}$$

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

28

There are 50 lemon trees in a reclaimed mine area. Each tree produces 800 lemons per year. For each additional tree planted in this area, considering all trees, the output number of fruits per tree drops by 10 lemons in a year. The number of trees that to be added to the existing reclaimed area in order to maximise the total number of lemons in the year is

A) 10 B) 15 C) 16 D) 26

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

29

In an opencast mine loading and transporting has been carried out by shovel dumper combination. There is only one shovel is in operation. Dumpers arrive at the rate of 10 dumpers per hour and it takes shovel on an average 5 minutes to load a dumper. Assume arrival is Poisson and service time is exponentially distributed. What is expected waiting time of the dumper in the queue?

A) $$\frac{5}{7}$$ hour B) $$\frac{5}{12}$$ hour C) $$\frac{12}{7}$$ hour D) $$\frac{1}{2}$$ hour

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

30

A mining project is composed of five activities whose three time estimates in months are given below:

Activity	Estimated duration (months)
	Optimistic time	Most likely time	Permissible time
1-2	1	1	7
1-3	2	5	8
2-4	1	1	7
3-4	2	5	14
4-5	3	6	15

The standard deviation of the project length in months is

A) 2 B) 3 C) 6 D) 9

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Mine System Engineering MCQs Questions & Answers | Mining Engineering