During the physical treatment process of wastewater, what is the correct order of following operations to be followed? (A) Flocculation (B) Filtration (C) Screening (D) Sedimentation Choose the correct answer from the options given below :

The question consists of two statements, one labelled as ‘Assertion (A)’ and the other as ‘Reason (R)’: Assertion (A): Tapered flocculation is more efficient when compared to the conventional process of flocculation. Reason (R): In tapered flocculation, velocity gradient at the inlet is less than that at the outlet of the flocculation unit. Examine above two statements carefully and select the correct answer from the option given below:

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is the not correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

The various treatment processes in a water treatment plant are listed below. A. Filtration B. Chlorination C. Sedimentation D. Coagulation E. Flocculation Which of the following is the correct sequence of processes in water treatment?

A

A, B, E, C, D

B

D, E, C, A, B

C

A, B, C, D, E

D

B, C, A, E, D

The question given below consists of a statement, followed by three arguments numbered I, II and III. You have to decide which of the arguments is/are ‘strong’ arguments and which is/are ‘weak’ arguments and accordingly choose your answer from the alternatives given below each question. Statement: The imposition of Governor’s rule in Jammu and Kashmir will not affect operations in the state, according to Army Chief General, even as security forces are looking at higher intensity of operations against terrorists, to force them to ‘hibernate’. These operations will be based on greater level of intelligence from the J&K Police, as compared to what was being generated during the suspension of operations for the holy month of Ramzan. A challenge, however, for the security forces still remains the recruitment of local terrorists. Why? Arguments: I. Meanwhile, data shared by security forces reveal that there are about 210 terrorists currently operating in Kashmir, mainly in the South. Out of this, 65 per cent are locals and the remaining are foreign terrorists. II. In South Kashmir itself, the maximum number of terrorists belong to the HizbulMujahideen, while some are from the Lashkar-e-Toiba and Jaish-e-Mohammed. III. When a local terrorist is killed during an operation, at his funeral more locals are willing to join terrorism. It is a mob mentality.

A

None is strong.

B

Only I and II are strong.

C

Only II and III are strong.

D

Only III is strong.

E

All are strong.

Which of the following treatment process are necessary for the removing suspended solids from water? a) Coagulation b) Sedimentation c) Flocculation d) Disinfection Select the correct answer using the codes given below:

A

a and b

B

a, b and c

C

b and d

D

a and d

Consider the following statements in respect of flow equalization in a wastewater treatment plant: 1. Biological treatment is enhanced because shock loadings are eliminated or minimized. 2. Flow equalization is an attractive option for upgrading the performance of overloaded treatment plants. 3. Inhibiting substances can be diluted and pH can be stabilized. 4. Thickening performance of primary sedimentation tanks following grit removal is improved. Which of the above statements are correct?

A

1, 2, 3 and 4

B

1, 2 and 3 only

C

1, 2 and 4 only

D

3 and 4 only

The type of wastewater treatment process for treating wastewater or industrial wastewater using aeration and biological flocs is called?

A

Active sludge process

B

Aeration

C

Biological aeration

D

Anaerobic digestion

Is ballasted flocculation a physical-chemical sedimentation process?

A

True

B

False

CSIR-Central Mechanical Engineering Research Institute has unveiled the 1st wastewater treatment technology model. Aqua Rejuvenation Plant (ARP) has purification profile of how many stages for comprehensive treatment of wastewater?

A

3

B

4

C

5

D

6

E

7

Which of the following are physical means of purifying water ? I. decantation II. chlorination III. filtration IV. sedimentation Select the correct answer using the codes given below.

A

I and II

B

II and III

C

I, II and III

D

I, III and IV

What is the typical sequence in which the following selection devices are used by the company? a) Reference checks b) Physical examination c) Application Blank d) Hire e) Conditional Offers f) More interviews g) Screening interviews h) Tests Choose the correct answer from the options given below

A

c) → g) → h) → f) → a) → e) → b) → d)

B

d) → g) → f) → h) → a) → e) → b) → c)

C

c) → h) → g) → a) → f) → e) → b) → d)

D

d) → g) → h) → f) → a) → e) → b) → d)

During the physical treatment process of wastewater, what is the correct order of following operations to be followed? (A) Flocculation (B) Filtration (C) Screening (D) Sedimentation Choose the correct answer from the options given below :

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