VFA Mixed Practice Test #153

Question 1

Kerala's first Speaker:

Accepted Answer

R. Shankaranarayanan Thampi — R. Shankaranarayanan Thampi (1957-59).

Answer

P. Krishnan

Answer

Alexander Parambithara

Answer

K.M. Seethi

Question 2

India's first satellite was:‌​‍

Accepted Answer

Aryabhata — Aryabhata was India's first satellite, launched on 19 April 1975 by the Soviet Union from Kapustin Yar.‌​‍

Answer

Rohini

Answer

INSAT-1A

Answer

Bhaskara

Question 3

Before introducing a complex topic on photosynthesis, a biology lecturer starts the class by providing a general overview of energy transformation in living organisms and its importance. This instructional strategy is best described as an application of:

Accepted Answer

C. Advance organizers — David Ausubel proposed advance organizers as a tool to help learners meaningfully link new information to existing knowledge by providing a conceptual framework before the main lesson. The lecturer's general overview serves as an expository advance organizer, facilitating meaningful reception learning. This is distinct from inductive reasoning, rote learning, or the broader constructivist approach.

Answer

A. Inductive reasoning

Answer

B. Rote learning

Answer

D. Constructivist approach

Question 4

Stomata are regulated by:‌​‍

Accepted Answer

Guard cells (turgor changes) — K+ uptake → water in → turgid → stoma open. ‌​‍Abscisic acid closes them under stress.

Answer

Wind

Answer

Sunlight only

Answer

Leaf temperature only

Question 5

K.S.E.B. (Kerala State Electricity Board) was formed in the year:‌​‍

Accepted Answer

1957 — KSEB constituted on 7 March 1957.‌​‍

Answer

1956

Answer

1959

Answer

1958

Question 6

Lipase enzymes digest:

Accepted Answer

Fats (lipids) — Pancreatic lipase hydrolyses triglycerides into fatty acids + glycerol.

Answer

Carbohydrates

Answer

Proteins

Answer

Nucleic acids

Question 7

Rods function:

Accepted Answer

Low-light vision — Dim light.

Answer

Colour

Answer

Both

Answer

None

Question 8

If an object returns to its starting point, its displacement is:

Accepted Answer

Zero — Displacement = change in position; if back to start, net displacement = 0.

Answer

Maximum

Answer

Equal to distance

Answer

Infinity

Question 9

Which of the following soil types is predominantly found in the laterite regions of Kerala and is characterized by its red color due to iron oxide accumulation?

Accepted Answer

C. Laterite soil — Laterite soil is formed due to intense leaching in high rainfall and temperature conditions, leading to the accumulation of iron and aluminum oxides, which gives it a distinct red color. Alluvial soil is found in river basins, black soil is typical of Deccan regions, and red loamy soil is less common in Kerala's lateritic zones.

Answer

A. Alluvial soil

Answer

B. Black soil

Answer

D. Red loamy soil

Question 10

A worker pushes a heavy crate across a horizontal floor at a constant speed. The worker applies a constant force 'F' over a distance 'd'. Which of the following statements accurately describes the energy transformations and work done in this scenario?

Accepted Answer

B. The work done by the worker is Fd, and the work done by friction converts mechanical energy into heat. — Since the crate moves at a constant speed, its kinetic energy remains unchanged, meaning the net work done on it is zero according to the Work-Energy Theorem. The worker does positive work (Fd), and this work is entirely balanced by the negative work done by friction (-Fd), which converts the mechanical energy into thermal energy (heat). Therefore, option B is correct. Option A is incorrect because net work is zero and kinetic energy is constant. Option C is incorrect because mechanical energy is not conserved due to the presence of friction. Option D is incorrect because the work done is diss

Answer

A. The net work done on the crate is Fd, and its kinetic energy increases.

Answer

C. The total mechanical energy of the crate remains constant, as it moves at a constant speed.

Answer

D. The work done by the worker is entirely converted into the kinetic energy of the crate.

VFA Mixed Practice Test #153