DCOA Mixed Practice Test #595

Question 1

Client-centred therapy:‌​‍

Accepted Answer

Carl Rogers — unconditional positive regard, empathy — Humanistic. ‌​‍Non-directive. Therapist creates accepting environment for self-exploration.

Answer

Ellis

Answer

Skinner

Answer

Freud

Question 2

Dobereiner's triads were arranged by:‌​‍

Accepted Answer

Atomic mass (middle ≈ mean of extremes) — E.g., Li(7), Na(23), K(39): (7+39)/2 = 23. Failed for many elements.‌​‍

Answer

Atomic number

Answer

Density

Answer

Valency

Question 3

An ecological pyramid showing decreasing energy at higher trophic levels is a:‌​‍

Accepted Answer

Energy pyramid (always upright) — ~10% energy transfer between trophic levels → energy pyramid always tapers upward.‌​‍

Answer

Cylindrical

Answer

Pyramid of numbers only

Answer

Inverted pyramid

Question 4

Among Li, Be, K, Ca — which requires highest-frequency radiation for electron emission?‌​‍

Accepted Answer

Be — Beryllium has the highest work function among these metals.‌​‍

Answer

K

Answer

Ca

Answer

Li

Question 5

Melanin:‌​‍

Accepted Answer

Skin pigment — Skin/hair/eye colour pigment.‌​‍

Answer

Enzyme

Answer

Protein

Answer

Vitamin

Question 6

A chilly, flabby, fair-haired child with a large head and profuse sour sweat on the scalp, especially during sleep, is brought in. They have a craving for indigestible things like eggs and chalk, and are generally slow in development. What is the most probable remedy?

Accepted Answer

D. Calcarea Carbonica — Calcarea Carbonica is characterized by a chilly, flabby constitution, sour perspiration on the scalp (especially during sleep), delayed development, and peculiar cravings for eggs or indigestible substances. Graphites patients are generally obese and have skin eruptions with sticky discharges, Hepar Sulph is extremely chilly and sensitive to pain, and Silica is delicate, refined, and lacks vital heat, none matching the full picture.

Answer

A. Graphites

Answer

B. Hepar Sulphuris Calcareum

Answer

C. Silica

Question 7

Kerala Chief Electoral Officer:‌​‍

Accepted Answer

Rtd. IAS — Senior IAS officer.‌​‍

Answer

Political

Answer

Judicial

Answer

None

Question 8

Army Day 2023 outside Delhi:‌​‍

Accepted Answer

Bangalore (first outside) — First Army Day outside Delhi was Bengaluru.‌​‍

Answer

Delhi

Answer

Pune

Answer

Chennai

Question 9

Which of the following scenarios best illustrates a controlled nuclear chain reaction, a principle crucial for sustainable energy production?

Accepted Answer

C. The continuous generation of electricity in a nuclear power plant reactor. — A nuclear power plant reactor utilizes control rods to absorb excess neutrons, thereby maintaining a sustained and controlled chain reaction that generates heat for electricity. An atomic bomb represents an uncontrolled chain reaction, leading to a massive, instantaneous energy release. Spontaneous decay is a natural radioactive process, not a chain reaction, and nuclear fusion is a distinct process where light nuclei combine.

Answer

A. The spontaneous decay of Uranium-238 into Thorium-234.

Answer

B. The rapid, uncontrolled release of energy in an atomic bomb explosion.

Answer

D. The fusion of hydrogen isotopes in the sun's core.

Question 10

Select the correctly spelt word:

Accepted Answer

Champagne — Champagne (sparkling wine, French origin).

Answer

Champaene

Answer

Shampagne

Answer

Shampaene

DCOA Mixed Practice Test #595