DCOA Mixed Practice Test #539

Question 1

A generally untidy individual, who is prone to philosophical discussions, suffers from chronic skin eruptions with intense burning and itching, especially when warm in bed. They have a strong aversion to bathing and feel generally worse from heat. Which remedy is strongly suggested by this totality of symptoms?

Accepted Answer

D. Sulphur — Sulphur is strongly indicated by the characteristic untidy appearance, philosophical disposition, burning and itching skin eruptions (especially worse from warmth in bed), and a general aversion to bathing and aggravation from heat. Psorinum is known for offensive discharges and despair, Graphites for skin affections with sticky exudations, and Sepia for indifference and bearing-down sensation.

Answer

A. Psorinum

Answer

B. Graphites

Answer

C. Sepia

Question 2

Stokes' law: viscous force on a sphere moving in fluid is:

Accepted Answer

F = 6πηrv — Applies for small spheres, low Re. Terminal velocity when gravity = buoyancy + drag.

Answer

F = ½ρv²A

Answer

F = ρVg

Answer

F = ηA dv/dx

Question 3

Kerala's longest river:‌​‍

Accepted Answer

Periyar — Periyar — 244 km, longest river in Kerala.‌​‍

Answer

Bharathapuzha

Answer

Pamba

Answer

Chaliyar

Question 4

A high school student struggles with math but becomes deeply engaged when solving problems related to video game design, an area of personal interest. Which motivational theory best explains this engagement?

Accepted Answer

C. Intrinsic motivation — The student's engagement stems from personal interest and inherent satisfaction in the task (video game design), which aligns with intrinsic motivation. Extrinsic motivation involves external rewards, and behaviorist theory focuses on reinforcement rather than internal drive.

Answer

A. Maslow's Hierarchy of Needs

Answer

B. Extrinsic motivation

Answer

D. Behaviorist reinforcement theory

Question 5

Which district in Kerala has the longest coastline?

Accepted Answer

Kannur — Kannur has the longest coastline among Kerala's 14 districts at about 82 km.

Answer

Kozhikode

Answer

Kasaragod

Answer

Alappuzha

Question 6

How many triangles are there in a typical Star of David?‌​‍

Accepted Answer

8 — Standard answer.‌​‍

Answer

10

Answer

6

Answer

12

Question 7

First Indian Navy Chief:

Accepted Answer

R.D. Katari — Adm R.D. Katari (1958).

Answer

Nanda

Answer

Krishnan

Answer

Saran

Question 8

In the reaction Zn + CuSO₄ → ZnSO₄ + Cu, zinc is:‌​‍

Accepted Answer

Oxidised — Zn loses electrons (Zn → Zn²⁺ + 2e⁻) → oxidation.‌​‍

Answer

Neither

Answer

Both oxidised and reduced

Answer

Reduced

Question 9

The birthplace of direct democracy in the ancient world was:‌​‍

Accepted Answer

Athens (Greece) — Athens, 5th c. BCE — direct citizen participation in the Ecclesia (assembly).‌​‍

Answer

Rome

Answer

Sparta

Answer

Jerusalem

Question 10

Who discovered the Edakkal Caves — reference: Wayanad petroglyphs dated to:

Accepted Answer

Bronze Age (~6000 BCE) — Edakkal rock engravings are associated with the Neolithic–Bronze Age transition.

Answer

Harappan Phase

Answer

Sangam Age

Answer

Medieval period

DCOA Mixed Practice Test #539