VFA Mixed Practice Test #77

Question 1

Chain reaction in U-235 occurs because each fission produces:

Accepted Answer

~2-3 neutrons (some cause further fissions) — Critical mass needed to sustain chain. Moderator slows neutrons to increase fission probability.

Answer

0 neutrons

Answer

1 neutron

Answer

10 neutrons

Question 2

Chief Election Commissioner of India (April 2016):‌​‍

Accepted Answer

Dr. Nasim Zaidi — Dr. Nasim Zaidi served as CEC from April 2015 to July 2017.‌​‍

Answer

S.Y. Quraishi

Answer

V.S. Sampath

Answer

Sasidaran Nair

Question 3

Unit of power:

Accepted Answer

Watt — W = J/s. 1 horsepower ≈ 746 W.

Answer

Joule

Answer

Newton

Answer

Pascal

Question 4

An adolescent who is part of a close-knit peer group that values conformity may experience which of the following social pressures?

Accepted Answer

A. Pressure to engage in risk-taking behaviors — The correct answer is A because adolescents who are part of a close-knit peer group that values conformity may feel pressure to engage in risk-taking behaviors to fit in or gain acceptance from their peers. This can include behaviors such as substance use, reckless driving, or other actions that might be harmful. Options B, C, and D are less likely in a group that emphasizes conformity over individuality or positive behaviors.

Answer

B. Influence to adopt healthy lifestyles

Answer

C. Encouragement to pursue individual interests

Answer

D. Support for exploring different social identities

Question 5

Fertilisation in angiosperms: primary endosperm nucleus (PEN) is:‌​‍

Accepted Answer

Triploid (3n) — fuses 2 polar + 1 sperm — Other sperm + egg → zygote (2n). ‌​‍Endosperm nourishes embryo. Unique double fertilization.

Answer

Tetraploid

Answer

Haploid

Answer

Diploid

Question 6

Kerala's first CM after statehood:‌​‍

Accepted Answer

EMS Namboodiripad — EMS 1957 first elected.‌​‍

Answer

Pattom Thanu Pillai

Answer

Ikkanda Warrior

Answer

Sankar

Question 7

Ayyankali's 'Villuvandi Samaram' (bullock-cart protest) in 1893 was aimed at establishing:

Accepted Answer

Right to travel on public roads for Dalits — Ayyankali rode a bullock cart on roads forbidden to Pulayas, asserting their right to use public roads.

Answer

Right to education

Answer

Temple entry

Answer

Voting rights

Question 8

pH of blood is tightly regulated at:‌​‍

Accepted Answer

7.35-7.45 — Blood pH is slightly alkaline; tight homeostasis is life-critical.‌​‍

Answer

1.5-2.0

Answer

5.5-6.0

Answer

8.0-9.0

Question 9

Onam celebrates the return of:‌​‍

Accepted Answer

King Mahabali — Onam celebrates King Mahabali's annual return to Kerala.‌​‍

Answer

Lord Rama

Answer

Lord Krishna

Answer

Parasurama

Question 10

Which of the following scenarios best illustrates intrinsic motivation in a learning environment?

Accepted Answer

C. A student practices solving mathematical problems because they find the process satisfying and enjoy the challenge. — Intrinsic motivation arises from internal satisfaction rather than external rewards. Option C reflects this as the student engages in the activity purely for the joy and personal fulfillment it provides, unlike options A, B, and D, which rely on external incentives.

Answer

A. A student studies hard to earn a scholarship for higher education.

Answer

B. A teacher rewards students with extra marks for completing assignments on time.

Answer

D. A school conducts a quiz competition with prizes for top performers.

VFA Mixed Practice Test #77