Plus 2 Lecturer Mixed Practice Test #960

Question 1

A scientist is designing a radiation detector to specifically identify alpha particles emitted from a radioactive source, while minimizing interference from beta and gamma radiation. Which of the following detector characteristics would be most effective for this purpose?

Accepted Answer

B. A very thin window or no window, and a short detection path within the detector. — Alpha particles have very low penetrating power and a short range in matter. Therefore, a detector with a very thin window or no window allows them to enter, and a short detection path is sufficient to capture their energy before they are fully absorbed, effectively distinguishing them from more penetrating beta and gamma radiation. Thick lead shielding is primarily for gamma rays, liquid scintillators are general-purpose but less specific for alpha due to range, and a magnetic field deflects both alpha and beta particles without selective identification based on entry alone.

Answer

A. A thick lead shielding around the detector.

Answer

C. A high-density liquid scintillator.

Answer

D. A strong magnetic field across the detection area.

Question 2

Study of weather:‌​‍

Accepted Answer

Meteorology — Meteorology.‌​‍

Answer

Seismology

Answer

Ecology

Answer

Geology

Question 3

Synonym of IRASCIBLE:‌​‍

Accepted Answer

Irritable — Easily angered.‌​‍

Answer

Patient

Answer

Friendly

Answer

Calm

Question 4

One who studies the stars and planets:

Accepted Answer

Astronomer — Astronomy is scientific study of celestial objects.

Answer

Astrologer

Answer

Geologist

Answer

Biologist

Question 5

Akshaya — Kerala project:‌​‍

Accepted Answer

e-literacy — e-literacy project.‌​‍

Answer

Transport

Answer

Healthcare

Answer

Fish

Question 6

Synonym of CAPITULATE:

Accepted Answer

Surrender — Give up, surrender.

Answer

Resist

Answer

Fight

Answer

Escape

Question 7

Following a significant crude oil spill impacting the coastal mangroves and backwaters of Kerala, local authorities are exploring advanced remediation strategies. Which biotechnological approach offers the most sustainable and environmentally sound solution for long-term cleanup in this sensitive ecosystem?

Accepted Answer

B. Introduction of genetically modified bacteria specifically engineered to metabolize and detoxify petroleum hydrocarbons. — The correct answer is B. Introducing genetically modified bacteria for bioremediation is a biotechnological approach that utilizes microorganisms' metabolic pathways to break down pollutants into less harmful substances. This method is sustainable and environmentally sound as it naturally degrades the hydrocarbons, unlike chemical dispersants (A) which can be toxic or physical removal methods like dredging (C) and high-pressure washing (D) that are disruptive and may not fully eliminate the pollutant from the ecosystem.

Answer

A. Extensive application of synthetic chemical dispersants to break down the oil into smaller droplets.

Answer

C. Dredging and removal of contaminated sediments, followed by their disposal in a designated landfill.

Answer

D. High-pressure washing of affected areas using strong alkaline solutions to dislodge oil from surfaces.

Question 8

The author of 'God of Small Things' is:

Accepted Answer

Arundhati Roy — Arundhati Roy won the 1997 Booker Prize for 'The God of Small Things'.

Answer

Kiran Desai

Answer

Jhumpa Lahiri

Answer

Vikram Seth

Question 9

What does humanistic psychology primarily emphasise?‌​‍

Accepted Answer

Self-actualisation, growth (Maslow, Rogers) — 'Third force'. ‌​‍Maslow's hierarchy of needs. Carl Rogers' client-centered therapy.

Answer

Unconscious

Answer

Cognition only

Answer

Stimulus-response

Question 10

Figure of speech in 'Fair is foul, and foul is fair' (Shakespeare):

Accepted Answer

Oxymoron / Paradox — Contradictory terms juxtaposed — oxymoron; the whole line is a paradox.

Answer

Metaphor

Answer

Simile

Answer

Metonymy

Plus 2 Lecturer Mixed Practice Test #960