Solved Example: 9126-01

Which of the following is the process of converting sugar into alcohol? (NTPC CBT-I Jan 2021 Shift I)

A. Oxidation

B. Pasteurisation

C. Bleaching

D. Fermentation

Correct Answer: D

Solved Example: 9126-02

Fermentation is a process in which: (OPSC OAS 2016 General Studies Paper I)

A. Organic compound is slowly decomposed into simple substances in presence of O$_2$

B. Organic compound is slowly decomposed into simple substances in absence of O$_2$

C. Simple substances are polymerized into complex substances

D. All of the above

Correct Answer: B

Solved Example: 9125-01

The activated sludge process is an: (MPSC AE Civil Mains 2017- Paper II)

A. Aerobic attached growth system

B. Anaerobic attached growth system

C. Anaerobic suspended growth system

D. Aerobic suspended system

Correct Answer: D

Solved Example: 9125-02

Which of the following statements is true for trickling filter sludge? (UPPCL JE CE 2015)

A. It is more difficult to dewater than activated sludge

B. It is bulky

C. It has a comparatively low concentration of sludge solids

D. It has a comparatively low sludge volume index

Correct Answer: D

Solved Example: 9125-03

What will be the Sludge Volume Index (SVI) if 100 ml of sludge collected in 30 mins on drying weighs 800 mg? (DDA JE Civil Shift I April 2018)

A. 125

B. 8

C. 0.008

D. 0.125

Correct Answer: A

Solved Example: 9125-04

Identify the waste water treatment unit which use both aerobic and anaerobic mechanism for the removal of organic matter? (CIL MT Civil : 2020)

A. Activated sludge process

B. Stabilization ponds

C. Trickling filter

D. Oxidation ditch

Correct Answer: B

Solved Example: 9123-01

Aerobic attached growth process is classified under: (SSC JE CE Paper VII- Sep 2019 Evening)

A. Activated sludge process

B. Chemical clarification

C. Preliminary treatment

D. Biological treatment

Correct Answer: D

Solved Example: 9124-01

Which of the following is a product of anaerobic respiration in our muscles? (CTET Paper II Jan 2022)

A. Water

B. Alcohol

C. Glucose

D. Lactic acid

Correct Answer: D

Solved Example: 9127-01

Antinutrients are also termed as: (FSSAI Central Food Safety Officer 2019)

A. Metabolic byproduct

B. Synthetic toxicants

C. Natural toxicant

D. Primary metabolites

Correct Answer: C