DCOA Mixed Practice Test #357

Question 1

In Fahrenheit, the freezing and boiling points of water are:‌​‍

Accepted Answer

32° and 212° — Fahrenheit scale: 32°F freezing, 212°F boiling. Celsius: 0°C and 100°C.‌​‍

Answer

0° and 212°

Answer

0° and 100°

Answer

32° and 100°

Question 2

National Anthem duration:‌​‍

Accepted Answer

52 seconds — Full version 52 seconds.‌​‍

Answer

48 seconds

Answer

60 seconds

Answer

55 seconds

Question 3

Kerala's drinking water source primarily:‌​‍

Accepted Answer

Surface water (rivers, reservoirs) — Mostly surface.‌​‍

Answer

Rainwater

Answer

Desalination

Answer

Groundwater

Question 4

Which specific chemical test is employed for the identification of deoxysugars present in cardiac glycosides, characterized by a reddish-brown color in the acetic acid layer and a bluish-green color in the sulfuric acid layer?

Accepted Answer

A. Keller-Kiliani test — The Keller-Kiliani test is a characteristic reaction for the presence of 2-deoxysugars, such as digitoxose, which are part of cardiac glycoside structures. Borntrager's test identifies anthraquinone glycosides, while Legal's and Baljet tests detect the butenolide ring of cardiac glycosides.

Answer

B. Borntrager's test

Answer

C. Legal's test

Answer

D. Baljet test

Question 5

Growth response to touch (e.g., tendrils coiling) is called:

Accepted Answer

Thigmotropism — Thigmotropism = response to touch; enables climbing plants to coil around supports.

Answer

Phototropism

Answer

Chemotropism

Answer

Geotropism

Question 6

The assassin of Archduke Franz Ferdinand (1914) was:

Accepted Answer

Gavrilo Princip (Bosnian Serb) — Princip, of Young Bosnia group, shot Archduke in Sarajevo. Triggered alliance system to activate, leading to WWI.

Answer

Vladimir Lenin

Answer

Stalin

Answer

Hitler

Question 7

Banasura Sagar Dam is in:‌​‍

Accepted Answer

Wayanad — Banasura Sagar Dam in Wayanad is the largest earth dam in India.‌​‍

Answer

Idukki

Answer

Palakkad

Answer

Thrissur

Question 8

SilverLine (K-Rail):‌​‍

Accepted Answer

Semi-high-speed rail project — Kasaragod-TVM semi-high-speed.‌​‍

Answer

Bullet

Answer

Metro

Answer

Monorail

Question 9

Invertebrates without backbone include:‌​‍

Accepted Answer

Insects, worms, sponges — No vertebral column.‌​‍

Answer

Fish

Answer

Mammals

Answer

Birds

Question 10

Where did Velakali, Kerala's spectacular martial ritual folk art, take shape?

Accepted Answer

Ambalapuzha — Velakali originated at the Ambalapuzha Sri Krishna temple, Alappuzha.

Answer

Vadakara

Answer

Edappally

Answer

Kodungallur

DCOA Mixed Practice Test #357