Everyday Science — All MCQs
2717 questions available
Q661.A camera uses a ____ to form an image.
Correct Answer: A
A camera uses a convex (converging) lens to focus light rays and form a real image on the film or sensor.
Q662.A canyon is a large form of ____?
Correct Answer: B
A canyon is a large, deep gorge, typically carved by a river over long periods of erosion.
Q663.A chronometer meter measures____?
Correct Answer: B
A chronometer is a precise timekeeping instrument, historically used for accurate time measurement in navigation.
Q664.A disease always has a____?
Correct Answer: C
By definition, a disease always has an underlying cause, whether it is biological, environmental, or genetic.
Q665.A doctor who specializes in diseases of the nose?
Correct Answer: A
A rhinologist is a doctor who specializes in diseases and disorders of the nose.
Q666.A fathom is equal to ____feets?
Correct Answer: A
A fathom, a unit used mainly for measuring water depth, is equal to 6 feet.
Q667.A group of elephants is called____?
Correct Answer: B
A group of elephants is called a herd.
Q668.A man can survive without food for at least?
Correct Answer: A
The human body can typically survive without food for about one month, depending on fat reserves and hydration, though water is needed much sooner.
Q669.A moving object always possesses?
Correct Answer: B
Any object in motion possesses kinetic energy, the energy of motion, proportional to its mass and the square of its velocity.
Q670.A normal platelets count range ?
Correct Answer: B
A normal platelet count ranges from about 1.5 to 4.5 lakh (150,000-450,000) platelets per microliter of blood.
Q671.A photostat machine works on ____?
Correct Answer: D
A photostat (photocopier) machine works on the principle of electrostatic image making (xerography), using light and charged toner.
Q672.A seed can germinate in the absence of____?
Correct Answer: B
Seeds of many plants can germinate in complete darkness, as germination depends mainly on water, oxygen, and warmth rather than light.
Q673.A three year child has ____ teeth?
Correct Answer: A
By age three, a child typically has a full set of 20 primary (milk) teeth.
Q674.According to Big Bang Theory, the Universe began about ____ billion years ago.
Correct Answer: A
The Big Bang Theory estimates the universe began approximately 10-20 billion years ago (modern estimates refine this to about 13.8 billion years).
Q675.Activity of Brain is recorded by ____?
Correct Answer: B
An EEG (Electroencephalogram) records the electrical activity of the brain via electrodes placed on the scalp.
Q676.Adult human brain is about____% of the total body weight.
Correct Answer: A
The adult human brain makes up about 2% of total body weight, despite using around 20% of the body's energy.
Q677.Air contains maximum amount of____?
Correct Answer: B
Nitrogen makes up about 78% of air by volume, the largest proportion of any atmospheric gas.
Q678.Albatros is____?
Correct Answer: A
An albatross is a large seabird known for its long wingspan and ability to glide over oceans.
Q679.All the bones of the body make a frame called?
Correct Answer: A
All the bones of the body together form a supporting framework called the skeleton.
Q680.An adult have permanent teeth?
Correct Answer: D
An adult human has 32 permanent teeth.