DCOA Mixed Practice Test #516

Question 1

Aadhaar-linked DBT:

Accepted Answer

Direct Benefit Transfer — Subsidies via Aadhaar.

Answer

Direct Bank Transaction

Answer

Data Based Transfer

Answer

None

Question 2

TCS CEO 2024:‌​‍

Accepted Answer

K Krithivasan — Krithivasan from June 2023.‌​‍

Answer

Ramadorai

Answer

Chandra

Answer

Rajesh Gopinathan

Question 3

Vande Bharat sleeper:‌​‍

Accepted Answer

Announced 2024 — Vande Bharat sleeper trains announced.‌​‍

Answer

Already running

Answer

Cancelled

Answer

Metro only

Question 4

Capillary rise h in a tube of radius r is given by:‌​‍

Accepted Answer

h = 2T cos θ/(rρg) — Jurin's law. ‌​‍h inversely proportional to r. Water rises (θ<90°), mercury depresses (θ>90°).

Answer

h = T/r

Answer

h = rρg/2T

Answer

h = ρg

Question 5

Which of the following unit is a fundamental unit?‌​‍

Accepted Answer

Second — Second is one of seven SI base (fundamental) units. Others are derived.‌​‍

Answer

Joule

Answer

Meter/Second

Answer

Watt

Question 6

The Kerala Fibre Optic Network (KFON) project has been a flagship initiative of the state government. Beyond providing high-speed internet connectivity, what is a key socio-economic objective KFON aims to achieve?

Accepted Answer

C. To bridge the digital divide by providing free internet access to economically backward households and government offices. — KFON's primary socio-economic objective is to bridge the digital divide by ensuring equitable access to high-speed internet. This includes providing free internet connections to economically backward families and government institutions, thereby promoting digital inclusion and e-governance. While other options relate to digital infrastructure or literacy, they do not capture the core socio-economic impact of KFON as effectively as bridging the digital divide for all.

Answer

A. To establish a new state-owned mobile network provider, competing with private telecom operators.

Answer

B. To ensure digital literacy for all citizens by distributing free tablets and laptops.

Answer

D. To develop advanced cybersecurity infrastructure exclusively for state government departments.

Question 7

The process by which kidneys clean blood using an artificial membrane is:

Accepted Answer

Dialysis — Haemodialysis removes wastes when kidneys fail.

Answer

Osmosis

Answer

Diffusion

Answer

Active transport

Question 8

The noble gas used in advertising sign tubes with reddish-orange glow is:‌​‍

Accepted Answer

Neon — Neon gives a reddish-orange glow in discharge tubes — used in 'neon signs'.‌​‍

Answer

Argon

Answer

Krypton

Answer

Helium

Question 9

IoT stands for:‌​‍

Accepted Answer

Internet of Things — IoT = Internet of Things — everyday devices connected to the internet.‌​‍

Answer

Information on Technology

Answer

Input/Output Terminal

Answer

International Online Trade

Question 10

Many drugs exert their therapeutic effects by inhibiting specific enzymes. If a drug acts as a competitive inhibitor, what effect would increasing the substrate concentration typically have on the enzyme's activity in the presence of the drug?

Accepted Answer

C. Overcome the inhibition — Competitive inhibitors bind to the enzyme's active site, competing with the natural substrate. Increasing the substrate concentration can outcompete the inhibitor for the active site, thereby overcoming the inhibition and allowing the enzyme to approach its maximal velocity (Vmax). Competitive inhibition increases the apparent Km but does not alter Vmax.

Answer

A. Decrease the Vmax

Answer

B. Increase the Km

Answer

D. Have no effect on the enzyme activity

DCOA Mixed Practice Test #516