DCOA Mixed Practice Test #810

Question 1

Transistor has:‌​‍

Accepted Answer

Three terminals (E, B, C) — Emitter, Base, Collector. NPN and PNP. Used as amplifier and switch.‌​‍

Answer

Only one

Answer

Four terminals

Answer

Two terminals

Question 2

The Kudumbashree programme in Kerala focuses on:‌​‍

Accepted Answer

Women's empowerment and poverty alleviation — Kudumbashree (launched 1998) empowers women via neighbourhood SHGs and micro-enterprises.‌​‍

Answer

Digital education

Answer

Tribal welfare

Answer

Environmental protection

Question 3

Latent heat of vaporisation of water is approximately:‌​‍

Accepted Answer

2260 kJ/kg — Latent heat of vaporisation of water ≈ 2260 kJ/kg (540 cal/g).‌​‍

Answer

334 kJ/kg

Answer

80 cal/g

Answer

4.186 J/g·K

Question 4

A student consistently performs well across various subjects like Mathematics, Science, and Literature, indicating a strong underlying cognitive ability that helps them grasp different concepts quickly. Which of Spearman's factors of intelligence best explains this observation?

Accepted Answer

C. General factor (g-factor) — The general factor (g-factor) in Spearman's theory represents a broad, underlying mental capacity that influences performance on all cognitive tasks. A student consistently performing well across diverse subjects like Math, Science, and Literature demonstrates this general intellectual ability, rather than specific skills for individual subjects. The specific factor (s-factor) would relate to unique abilities required for particular tasks.

Answer

A. Specific factor (s-factor)

Answer

B. Group factor (g-factor)

Answer

D. Common factor (c-factor)

Question 5

The highest point of a transverse wave is called the:‌​‍

Accepted Answer

Crest — Crest = peak (highest); trough = lowest point of a transverse wave.‌​‍

Answer

Antinode

Answer

Trough

Answer

Node

Question 6

Antiparticle of electron:‌​‍

Accepted Answer

Positron (same mass, +e charge) — Predicted by Dirac (1928), discovered by Anderson (1932, cosmic rays). ‌​‍Used in PET scans.

Answer

Proton

Answer

Neutron

Answer

Neutrino

Question 7

Mammals characteristics:

Accepted Answer

Hair, mammary glands — Hair and mammary glands.

Answer

Lay eggs

Answer

Gills

Answer

Scales

Question 8

Pulikali (Tiger dance) at:‌​‍

Accepted Answer

Onam in Thrissur — Performed during Onam in Thrissur.‌​‍

Answer

Thrissur Pooram

Answer

Kerala Piravi

Answer

Vishu

Question 9

A patient is kept NPO (nil per os) for an elective surgical procedure scheduled for the next morning. Which primary metabolic process will be immediately activated to maintain stable blood glucose levels in the fasting state?

Accepted Answer

C. Glycogenolysis — Glycogenolysis is the breakdown of stored glycogen in the liver to release glucose into the bloodstream, which is the primary mechanism for maintaining blood glucose during short-term fasting. Glycolysis breaks down glucose, glycogenesis stores glucose, and lipogenesis converts excess glucose into fat.

Answer

A. Glycolysis

Answer

B. Glycogenesis

Answer

D. Lipogenesis

Question 10

Eye's lens:

Accepted Answer

Converging — Biconvex lens.

Answer

Diverging

Answer

Plane

Answer

Concave

DCOA Mixed Practice Test #810