In metalliferrous deposit, the ore minerals generally occur in association with some non-metallic minerals known as

The following information is provided for an ore deposit:
Number of waste blocks = 10
Number of ore blocks = 5
Volume of each waste block, m³ = 600
Total cost of waste handling per m³ = Rs. 100
Tonnage of each ore block = 400
Total cost of ore handling per ton = Rs. 150
Sale price of ore per ton = Rs. 500
The net cash flow of mining the deposit in lakhs of rupees, is

A

3.4

B

2.5

C

1.0

D

0.8

Mohan deposit certain amount in bank saving account for 6 year which give simple interest of x% annually and invest same principle in fix deposit for 2 year which gives interest rate 10% and compounded annually, total interest he get from saving account to fix deposit in the ratio of 6 : 7, if bank provide (x + 3)% rate annually on saving account deposit, then difference of interest arise Rs.7,500 between saving account and fix deposit after respective time period, what amount he invest in fix deposit?

A

Rs.40,000

B

Rs.1,00,000

C

Rs.70,000

D

Rs.60,000

E

Rs.50,000

Which of the following is/are correct about minerals and rocks (A) Generally metallic minerals are found in igneous and metamorphic rocks. (B) If a rock contains copper then the rock looks blue in color. (C) Al ore minerals are not rocks. (D) All rocks are not ore minerals.

A

Only (A) and (B) are correct

B

Only (C) and (D) are correct

C

Only (A), (B) and (C) are correct

D

Only (A), (B) and (D) are correct

Which of the following statements are true with respect to iron ore?
I. Limestone and coal are important for smelting iron ore
II. More than 20% of the world iron ore deposits are in India
III. Odisha and Jharkhand top in the production of iron ore
IV. Iran is the largest buyer of Indian iron ore

A

I, II and III

B

II and III

C

III and IV

D

II, III and IV

Which of the following statements about minerals are correct? (A) Minerals are created by natural processes without any human interference (B) Mica and chromite are nonferrous minerals (C) Minerals lying at shallow depths are taken out through open cast mining (D) Minerals are a non-renewable resource

A

A, B and C

B

B, C and D

C

A, B and D

D

A, C and D

Match the following: List - I List - II i. Ore of Pb (Lead) a. Siderite ii. Ore of Fe (Iron) b. Galena iii. Ore of Cu (Copper) c. Philosopher's wool iv. Ore of Zn (Zinc) d. Malachite

A

i - c, ii - b, iii - a, iv - d

B

i - b, ii - a, iii - d, iv - c

C

i - c, ii - b, iii - c, iv - a

D

i - b, ii - c, iii - d, iv - a

500 kg of ore contained a certain amount of steel. After the first blast furnace process, 200 kg of slag containing 12.5% of steel was removed. The percentage of steel in the remaining ore was found to be 20% more than the percentage in the original ore. How many kg of steel were there in the original 500 kg ore?

A

89.2 kg

B

88.8 kg

C

62.8 kg

D

72.2 kg

E

None of the above

An ore block of length 30m and height 20m having an average width of 1.5m with sharp boundary walls is mined with a minimum mining width of 2m. If the tonnage factors are 3 t/m³ for ore, 2 t/m³ for wall rock and average grade of ore is 10%, the diluted grade of ore mined in percent is

A

7.5

B

7.84

C

8.18

D

8.52

The stoping method selected, where ore body is thick veins type ore and walls are strong and steeply dipping ore i.e. footwall steeper than angle of repose of broken ore is . . . . . . . .

A

Open stoping

B

Shrinkage stoping

C

Cut and fill

D

Sub level stoping

Consider the following statements about Iron ore.
1. Iron ore was first discovered in Odisha by PN Bose in 1904.
2. The iron ore deposits of Odisha state occur in five districts including Koraput.
Which of the following statements is/are correct?

A

Only 1

B

Only 2

C

Both 1 and 2

D

Neither 1 nor 2

In metalliferrous deposit, the ore minerals generally occur in association with some non-metallic minerals known as

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