DCOA Mixed Practice Test #230

Question 1

In Kerala's administrative structure, which body is responsible for the preparation and revision of the District Disaster Management Plan (DDMP) under the Disaster Management Act, 2005?

Accepted Answer

B. District Disaster Management Authority (DDMA) — The District Disaster Management Authority (DDMA), chaired by the District Collector, is mandated under the Disaster Management Act, 2005 to prepare and revise the District Disaster Management Plan (DDMP). The State Disaster Management Authority (SDMA) oversees at the state level, but local preparation is the DDMA's responsibility.

Answer

A. District Collector

Answer

C. District Panchayat Standing Committee

Answer

D. State Disaster Management Authority (SDMA)

Question 2

Total internal reflection occurs when light travels from:‌​‍

Accepted Answer

Denser to rarer medium beyond the critical angle — Beyond the critical angle, light is totally reflected back into the denser medium.‌​‍

Answer

Rarer to denser medium at any angle

Answer

Same medium to same medium

Answer

Denser to rarer medium at small angles

Question 3

LPG (cooking gas) mainly contains:‌​‍

Accepted Answer

Butane and Propane — LPG = Liquefied Petroleum Gas, mainly Butane (C₄H₁₀) and Propane (C₃H₈).‌​‍

Answer

Methane

Answer

Hydrogen

Answer

Nitrogen

Question 4

Night blindness vitamin:‌​‍

Accepted Answer

A — Vitamin A (Retinol) deficiency.‌​‍

Answer

B

Answer

C

Answer

D

Question 5

A large industrial unit in Kerala is observed to be consistently violating environmental norms by discharging untreated industrial waste into a nearby wetland, leading to severe ecological damage and public health concerns. Under the provisions of the Environment (Protection) Act, 1986, what is the most appropriate action the Central Government can take to address this situation directly?

Accepted Answer

B. Issue specific directions, including the closure, prohibition, or regulation of the industry's operations, even in the absence of specific rules for that particular type of waste. — Section 5 of the Environment (Protection) Act, 1986, grants the Central Government extensive powers to issue directions to any person, officer, or authority. These directions can include orders for the closure, prohibition, or regulation of any industry, operation, or process to prevent or control environmental pollution, making it the most direct and effective action. Options A, C, and D represent indirect actions, responsibilities of other bodies, or defer immediate regulatory action, which are not the primary direct power of the Central Government under EPA for such a violation.

Answer

A. Direct the State Pollution Control Board to initiate criminal proceedings against the industrial unit's management for environmental negligence.

Answer

C. Advise the local self-government to impose heavy fines on the industrial unit for violating municipal waste disposal regulations.

Answer

D. Form a high-level committee to conduct a detailed study on the long-term environmental impacts before any regulatory action can be taken.

Question 6

National Waterway-3 (Kollam to Kottappuram) was extended under the National Waterways Act 2016 up to:‌​‍

Accepted Answer

Kozhikode — NW-3 was extended up to Kozhikode (West Coast Canal).‌​‍

Answer

Malappuram

Answer

Thrissur

Answer

Kannur

Question 7

Determinant of 2x2 matrix [[a,b],[c,d]]:‌​‍

Accepted Answer

ad - bc — If zero, matrix singular (no inverse). ‌​‍Used in Cramer's rule for linear equations.

Answer

a+b+c+d

Answer

ab-cd

Answer

ad

Question 8

Municipalities:‌​‍

Accepted Answer

87 — 87 municipalities.‌​‍

Answer

200

Answer

100

Answer

60

Question 9

CIAL's solar power achievement:‌​‍

Accepted Answer

First fully solar-powered airport (2015) — World's first fully solar-powered airport.‌​‍

Answer

No solar

Answer

100% wind

Answer

Partial

Question 10

Regarding chiral drugs, which statement accurately describes the pharmacological significance of enantiomers?

Accepted Answer

C. One enantiomer of a chiral drug may be therapeutically active, while the other is inactive, or even contribute to adverse effects. — Biological systems, including receptors and enzymes, are chiral and interact stereospecifically with drugs. Therefore, one enantiomer of a chiral drug may be responsible for the desired therapeutic effect, while the other might be inactive, less active, or even produce unwanted side effects. Enantiomers have identical physical properties (like melting/boiling points) except for their interaction with plane-polarized light (rotating it in opposite directions).

Answer

A. Enantiomers always possess identical pharmacological activity and therapeutic profiles.

Answer

B. Enantiomers rotate plane-polarized light in the same direction but to different degrees.

Answer

D. Enantiomers typically have different melting points and boiling points.

DCOA Mixed Practice Test #230