General MCQs
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Q241.A Little inhalation is done through____?
Correct Answer: B
Light or minimal tobacco inhalation typically occurs through smoking pipes and cigars, as smoke isn't usually drawn deep into the lungs.
Q242.A loudspeaker changes ____ energy into sound energy.
Correct Answer: B
A loudspeaker converts electrical energy into sound energy using a vibrating diaphragm driven by an electromagnet.
Q243.A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving?
Correct Answer: C
A weighing machine in a lift shows minimum (zero) reading during free fall, when the lift's supporting cable fails and both the person and scale fall at the same acceleration.
Q244.A man presses more weight on earth at____?
Correct Answer: B
A person exerts more pressure/weight on the ground while standing, as their full weight rests on a smaller area (feet) compared to lying down.
Q245.A mixture of sand and naphthalene can be separated by ____ ?
Correct Answer: C
A mixture of sand and naphthalene can be separated by sublimation, since naphthalene sublimes (turns to vapour) on heating while sand does not.
Q246.A moderator is used in nuclear reactor in order to ?
Correct Answer: B
A moderator in a nuclear reactor slows down fast neutrons so they can more effectively sustain the fission chain reaction.
Q247.A point directly below the seismic focus is?
Correct Answer: B
The epicentre is the point on Earth's surface directly above the focus (origin) of an earthquake.
Q248.A pulsar is actually a____?
Correct Answer: D
A pulsar is a highly magnetized, rotating neutron star, the collapsed core of a massive star.
Q249.A reptile with a four-chambered heart is____?
Correct Answer: D
The crocodile is a reptile with a four-chambered heart, unlike most other reptiles which have three chambers.
Q250.A Rhinoscope (or Nasoscope) is a thin, tube-like instrument used to examine the inside of the____?
Correct Answer: B
A rhinoscope (nasoscope) is a thin tube-like instrument used to examine the inside of the nose.
Q251.A rocket needs the speed of ____ to escape from earth’s gravity?
Correct Answer: D
A rocket needs a speed of about 7 miles per second (escape velocity) to break free of Earth's gravitational pull.
Q252.A satellite moving round the earth with a uniform speed has____?
Correct Answer: C
A satellite in circular orbit at uniform speed still has uniform (centripetal) acceleration directed toward the Earth, since its direction constantly changes.
Q253.A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?
Correct Answer: D
A person needs a plane mirror only half their height to see their full reflection, so a six-foot-tall lady needs a minimum 3-foot mirror.
Q254.A slow-running pendulum clock can be speeded up by____?
Correct Answer: C
A slow-running pendulum clock can be sped up by reducing the length of the pendulum rod, which increases its swing frequency.
Q255.A state of stress caused by concern for the earth’s environment is called?
Correct Answer: A
Eco-anxiety is a state of chronic stress or worry caused by concern over environmental degradation and climate change.
Q256.A summary value calculated from population is called?
Correct Answer: A
A summary numerical value describing an entire population (rather than a sample) is called a parameter.
Q257.A temporary magnet should be made from ____?
Correct Answer: C
Soft iron is typically used to make temporary magnets since it magnetizes and demagnetizes easily.
Q258.A term biotype means ____?
Correct Answer: A
Biotype refers to a group of individuals within a species sharing the same genetic makeup (genotype), often expressed as the same phenotype.
Q259.A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to____?
Correct Answer: D
A tightrope walker's long pole helps keep the body's center of gravity positioned directly above the rope, improving balance.
Q260.A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to ____?
Correct Answer: C
A boy standing too close to a fast-moving train may be pulled toward it due to the drop in air pressure created by the train's motion (Bernoulli's principle).