Which of the following materials are categories of ceramic materials? 1. Oxides – Alumina, Zirconia 2. Non-oxides – Carbides, Borides, Nitrides, and Silicides 3. Composites – Particulate reinforced combinations of oxides and non-oxides Select the correct answer using the code given below.

Consider the following statements regarding corrosion of ceramic material: 1. Ceramic materials are much better suited to withstand most of these environments for reasonable time periods than are metals. 2. Corrosion of ceramic materials generally involves simple chemical dissolution, in contrast to the electrochemical processes found in metals. 3. Ceramic materials are not frequently used because of their non-resistance to corrosion. Which of the above statements is/are correct?

A

1 and 3 only

B

2 and 3 only

C

3 only

D

1 and 2 only

Which of the following types of particulate matter pollutants are used in the calculation of the Air Quality Index (AQI)? (A) TSP (Total Suspended Particles) (B) PM 10 (Particulate matters of size 10 micron or less) (C) PM 2.5 (Particulate matter of size 2.5 micron or less) (D) PM 1 (Particulate matter of size 1 micron or less) Choose the correct answer from the options given below:

A

(B), (C) and (D) only

B

(A) and (B) only

C

(B) and (C) only

D

(A), (B) and (C) only

Ceramic nanoparticles are classified into three groups – ceramic nanoparticles, ceramic nanoscaffolds and ceramic nanoclays.

A

False

B

True

Consider the following statements: 1. Functions of reinforcement in reinforced soil and in reinforced concrete are comparable. 2. The design of a geotextile reinforced wall is similar in principle to that of a reinforced earth wall. Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: The crystallinity of ceramic materials ranges from highly oriented to semi-crystalline, vitrified, and often completely amorphous. B: A ceramic is a solid material comprising an inorganic compound of metal or metalloid and non- metal with ionic or covalent bonds. C: Most often, fired ceramics are either vitrified or semi-vitrified as is the case with earthenware, stoneware, and porcelain. D: Common examples of ceramic are earthenware, porcelain, and brick.

A

BADC

B

BDCA

C

BDAC

D

ADBC

Match List I with List II List I List II A. Selective coding I. To discover the most significant or frequent initial code that makes the most analytical sense B. Initial coding II. The procedure of selecting the core category, Systematically relating it to other categories, validating their relationships, and filling in categories that need further refinement and development C. Focused coding III. It specifies possible relationships between categories, these are integrative D. Theoretical coding IV. Comparing data with data, staying close to and remain open to exploring what is happening in data, construct and keep the code short, simple, precise and active. Choose the correct answer from the options given below:

A

A ‐ II, B ‐ IV, C ‐ I, D ‐ III

B

A ‐ IV, B ‐ I, C ‐ III, D ‐ II

C

A ‐ I, B ‐ III, C ‐ II, D ‐ IV

D

A ‐ III, B ‐ II, C ‐ IV, D ‐ I

Arrange the following refractory materials in ascending order of their melting points.
P. Alumina
Q. Silica
R. Carbon
S. Zirconia

A

R > P > Q > S

B

S > R > Q > P

C

R > S > P > Q

D

P > S > R > Q

Which of the following are some important pollutants released by the steel industry in India? 1. Oxides of sulphur 2. Oxides of nitrogen 3. Carbon monoxide 4. Carbon dioxide Select the correct answer using the code given below.

A

1, 3 and 4 only

B

2 and 3 only

C

1 and 4 only

D

1, 2, 3 and 4

There are three categories of jobs A, B and C. The average salary of the student who got the job of A and B categories is 26 lakh per annum. The average salary of the students who got the job of B and C category is 44 lakh per annum and the average salary of those students who got the job of A and C categories is 34 lakh per annum. The most appropriate (or closet) range of average salary of all the three categories (if it is known that each student gets only one category of jobs i.e. , A, B and C):

A

lies between 30 and 44

B

lies between 28 and 34

C

lies between 34 and 44

D

lies between 27 and 44

E

None of these

With reference to Fibre-reinforced plastic, consider the following statement: 1. It is a composite material made of a polymer matrix reinforced with fibres. 2. Bakelite was the first fibre-reinforced plastic. Which of the statements given above is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

Which of the following materials are categories of ceramic materials? 1. Oxides – Alumina, Zirconia 2. Non-oxides – Carbides, Borides, Nitrides, and Silicides 3. Composites – Particulate reinforced combinations of oxides and non-oxides Select the correct answer using the code given below.

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