Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by

Consider the 5 × 5 matrix \[{\text{A}} = \left[ {\begin{array}{*{20}{c}} 1&2&3&4&5 \\ 5&1&2&3&4 \\ 4&5&1&2&3 \\ 3&4&5&1&2 \\ 2&3&4&5&1 \end{array}} \right

A

\

B

It is given that A has only one real eigen value.
Then the real eigen value of A is

C

A. -2.5

D

0

Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

A

Quenching of hot coke

B

Discharging in the river stream

C

Filtration and recycling for cooling coke oven gas

D

None of these

Eigen values of the matrix \[\left[ {\begin{array}{*{20}{c}} 0&1&0&0 \\ 1&0&0&0 \\ 0&0&0&{ - 2i} \\ 0&0&{2i}&0 \end{array}} \right

A

\

B

are

C

A. -2, -1, 1, 2

D

-1, 1, 0, 2

Let A be an m × n matrix and Ban n × m matrix. It is given that determinant ($$I$$_m + AB) = determinant ($$I$$_n + BA), where $$I$$_k is the k × k identity matrix. Using the above property, the determinant of the matrix given below is
\[\left[ {\begin{array}{*{20}{c}} 2&1&1&1 \\ 1&2&1&1 \\ 1&1&2&1 \\ 1&1&1&2 \end{array}} \right

A

\

B

A. 2

C

5

Coke made in narrower by-product coke ovens (as compared to wider ovens) is

A

Less reactive

B

Stronger

C

Smaller in size

D

All of the above

Narrow coke ovens as compared to wider coke ovens

A

Produce smaller coke

B

Produce stronger coke

C

Require less time of carbonisation

D

All of the above

Flue gas from the heating chamber of byproduct coke ovens is removed by

A

Forced draft fan

B

Induced draft fan

C

Steam ejector

D

Natural draft

Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant?

A

Ammonium sulphate

B

Ammonium nitrate

C

Ammonium phosphate

D

None of these

Coke ovens in steel plant are heated by

A

Electricity

B

Coke oven gas

C

Mixed gas

D

Both B & C

Consider the following statements about the Rourkela Steel Plant
1. It is the first integrated steel plant in the Public Sector in India.
2. The plant has a capacity to produce 1.9 million tonnes of crude steel.
Which of the above statements is/are correct?

A

Only 1

B

Only 2

C

Both 1 and 2

D

Neither 1 nor 2

Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by

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