DCOA Mixed Practice Test #475

Question 1

Kerala's rail network under:‌​‍

Accepted Answer

Southern Railway — Southern Railway zone.‌​‍

Answer

South Central

Answer

Konkan

Answer

Central

Question 2

A patient diagnosed with a terminal illness repeatedly claims that the doctors have made a mistake and that they are perfectly healthy. Which defense mechanism is this patient primarily utilizing?

Accepted Answer

B. Denial — Denial is a defense mechanism where an individual refuses to accept reality or a fact. In this scenario, the patient is refusing to acknowledge the terminal diagnosis. Repression involves unconsciously pushing distressing thoughts into the unconscious, while projection involves attributing one's own unacceptable thoughts to another person, and sublimation channels unacceptable impulses into socially acceptable ones.

Answer

A. Repression

Answer

C. Projection

Answer

D. Sublimation

Question 3

Moseley's law relates:‌​‍

Accepted Answer

Characteristic X-ray frequency to atomic number — √ν ∝ (Z-1). Reorganised periodic table by atomic number.‌​‍

Answer

Temperature to pressure

Answer

Volume to moles

Answer

Force to acceleration

Question 4

The chemical name of Vitamin C is:‌​‍

Accepted Answer

Ascorbic acid — Vitamin C = Ascorbic acid. ‌​‍Retinol = Vitamin A. Thiamine = Vitamin B1. ‌​‍Calciferol = Vitamin D.

Answer

Thiamine

Answer

Retinol

Answer

Calciferol

Question 5

Malayala Manorama newspaper was founded in:‌​‍

Accepted Answer

1888 — Malayala Manorama was founded in 1888 by Kandathil Varghese Mappillai. ‌​‍It is currently the largest circulated Malayalam newspaper.

Answer

1847

Answer

1887

Answer

1923

Question 6

Urea, a nitrogen-rich organic fertiliser, has the formula:

Accepted Answer

CO(NH₂)₂ — Urea CO(NH₂)₂ contains ~46% nitrogen — richest solid N fertiliser.

Answer

NH₄NO₃

Answer

NH₃

Answer

Ca(NO₃)₂

Question 7

A kilobyte is defined in binary as:

Accepted Answer

1024 bytes — Traditional KB = 2¹⁰ = 1024 bytes (binary); SI kB = 1000 bytes.

Answer

1000 bytes

Answer

1 million bytes

Answer

8 bytes

Question 8

In a 5E learning cycle, students are working in groups to design an experiment to test the effect of different soil types on plant growth. They are collecting data and observing changes over several weeks. Which phase of the 5E model are the students primarily engaged in?

Accepted Answer

B. Explore — The 'Explore' phase of the 5E model is where students actively investigate concepts through hands-on activities, experiments, and data collection. Designing an experiment, collecting data, and observing changes directly align with the investigative nature of this phase. The other phases have different primary objectives, such as sparking interest (Engage), formalizing concepts (Explain), or applying knowledge (Elaborate).

Answer

A. Engage

Answer

C. Explain

Answer

D. Elaborate

Question 9

Dr. Kalam is popularly known as the:‌​‍

Accepted Answer

Both Missile Man and People's President — Kalam is known as the 'Missile Man' (for SLV-3, Agni, Prithvi) and 'People's President'.‌​‍

Answer

People's President

Answer

Iron Man of India

Answer

Missile Man of India

Question 10

A reducing agent in a redox reaction is itself:‌​‍

Accepted Answer

Oxidised — Reducing agent donates electrons (reduces other), thus gets oxidised itself.‌​‍

Answer

Reduced

Answer

Neither

Answer

Destroyed

DCOA Mixed Practice Test #475