DCOA Mixed Practice Test #406

Question 1

Lorentz force on moving charge:‌​‍

Accepted Answer

F = q(v × B) — Total Lorentz force: F = q(E + v × B). Circular motion in uniform B: r = mv/qB.‌​‍

Answer

F = qE only

Answer

F = mv

Answer

F = ma

Question 2

Ward Committees are mandatory in municipalities with population over:‌​‍

Accepted Answer

3 lakh — Ward Committees are mandatory in municipalities with population of 3 lakh and above.‌​‍

Answer

1 lakh

Answer

5 lakh

Answer

10 lakh

Question 3

Calvin cycle:‌​‍

Accepted Answer

Dark reaction of photosynthesis — CO2 fixation in photosynthesis stroma.‌​‍

Answer

DNA replication

Answer

Glycolysis

Answer

Krebs cycle

Question 4

1 light year is a unit of:‌​‍

Accepted Answer

Distance — Distance (~9.46 trillion km).‌​‍

Answer

Time

Answer

Speed

Answer

Mass

Question 5

1 unit electricity =:‌​‍

Accepted Answer

1 kWh — 1 unit = 1 kilowatt-hour.‌​‍

Answer

1 Watt

Answer

1 Joule

Answer

1 Ampere

Question 6

A teacher conducting action research on improving student participation in group discussions is reflecting on the process. Which statement accurately highlights a key characteristic or benefit of action research for her professional development?

Accepted Answer

B. It allows the teacher to become a critical inquirer into her own practice, leading to continuous improvement. — Action research empowers teachers to critically examine their own teaching, identify problems, implement solutions, and reflect on the outcomes. This cyclical process fosters continuous professional development by making teachers reflective practitioners who actively improve their classroom practices, rather than generating universal theories or being a one-time event.

Answer

A. It primarily generates abstract theories that can be universally applied without modification.

Answer

C. It is a one-time project designed to solve a problem definitively, rather than an ongoing process.

Answer

D. Its main purpose is to compare her teaching methods with those of other schools to establish best practices.

Question 7

When did Vasco da Gama reach Calicut (India)?‌​‍

Accepted Answer

1498 — Da Gama landed at Kappad near Calicut on 20 May 1498 — first sea route from Europe to India, via Cape of Good Hope.‌​‍

Answer

1492

Answer

1519

Answer

1488

Question 8

If a=3, b=4, hypotenuse:

Accepted Answer

5 — √(9+16) = √25 = 5.

Answer

6

Answer

7

Answer

8

Question 9

Plant cell wall is made of:‌​‍

Accepted Answer

Cellulose primarily — Fungal cell wall: chitin. ‌​‍Bacterial: peptidoglycan. Plant secondary wall has lignin too.

Answer

Peptidoglycan

Answer

Protein

Answer

Chitin

Question 10

Unit cell that has atoms at 8 corners only:‌​‍

Accepted Answer

Simple cubic — Simple cubic: 1 atom/unit cell. ‌​‍BCC: 2. FCC: 4. ‌​‍HCP: 6. Packing efficiency: 52%, 68%, 74%.

Answer

FCC

Answer

Hexagonal

Answer

BCC

DCOA Mixed Practice Test #406