Everyday Science — All MCQs
2717 questions available
Q681.An average human heart beats about time in a minute?
Correct Answer: A
An average healthy adult's heart beats about 72 times per minute at rest.
Q682.Comets revolves around?
Correct Answer: A
Comets, like planets, revolve around the Sun in elliptical orbits.
Q683.Earthquakes are caused by:
Correct Answer: D
Earthquakes can be caused by tectonic plate movement, volcanic activity, and human activities, so 'all of these' is correct.
Q684.ECG is used for the diagnosis of aliments of ?
Correct Answer: B
An ECG (Electrocardiogram) records the heart's electrical activity and is used to diagnose heart conditions.
Q685.‘Bar’ is the unit of____?
Correct Answer: C
The bar is a unit of pressure, roughly equal to atmospheric pressure at sea level.
Q686.‘Black holes’ refers to____?
Correct Answer: C
A black hole is a region of space formed from a collapsed object so dense that its gravity prevents even light from escaping.
Q687.‘Christian Friedrich Schönbein’ discovery is____?
Correct Answer: A
German chemist Christian Friedrich Schönbein discovered ozone in 1839 by its distinctive smell during electrolysis experiments.
Q688.‘ELISA’ test is employed to diagnose?
Correct Answer: B
The ELISA (Enzyme-Linked Immunosorbent Assay) test is commonly used to detect HIV/AIDS antibodies in blood.
Q689.‘Satiety’ is the condition in which patient lacks?
Correct Answer: B
Satiety refers to the feeling of fullness after eating, so a patient in this state lacks the desire to eat.
Q690.1 BTU(British thermal unit) is equal to____?
Correct Answer: C
One BTU (British Thermal Unit) is equal to approximately 1,055 joules of energy.
Q691.1 Carat is equal to ____?
Correct Answer: A
One carat, used to measure gemstone weight, is equal to 0.2 grams (200 milligrams).
Q692.1 Meter = ____ millimeters?
Correct Answer: D
One metre equals 1,000 millimetres.
Q693.1 Meter = ____?
Correct Answer: B
One metre equals 100 centimetres.
Q694.1 nanometer = ?
Correct Answer: C
One nanometre equals 10⁻⁹ (one billionth) of a metre.
Q695.1 tonne = ____ kg?
Correct Answer: C
One tonne (metric ton) equals 1,000 kilograms.
Q696.746 watts are equivalent to____?
Correct Answer: C
746 watts is equivalent to 1 horsepower (HP), the standard conversion used in mechanics and engineering.
Q697.A ‘breath test’ used by traffic police to check drunken driving uses ____?
Correct Answer: D
Breathalyzer tests historically used a potassium dichromate-sulphuric acid solution, which changes colour when it reacts with alcohol in breath.
Q698.A bird sitting on a high tension electric wire does not get electrocuted because:
Correct Answer: C
A bird on a high-tension wire doesn't get shocked because it touches only one wire, so no closed circuit forms for current to flow through its body.
Q699.A blood alcohol level above ____ will often result in death:
Correct Answer: D
A blood alcohol concentration above roughly 0.40% is often fatal, as it severely depresses the central nervous system.
Q700.A body can escape the gravitational pull of the earth if it is thrown up with a velocity of ____ miles/second ?
Correct Answer: D
A body must be thrown upward at about 7 miles per second (escape velocity) to overcome Earth's gravitational pull.