All Free Everyday Science MCQs with Answers

1561. What is the most abundant form of matter in the universe?

• A. Plasma
• B. Liquid
• C. Gas
• D. Solid

Explanation: Most ordinary matter in the visible universe is plasma, including stars, because extreme heat strips electrons from atoms. Plasma is therefore distinct from the solid, liquid and neutral-gas states listed.

1562. Bolometer measures: ____________?

• A. Breadith of tree
• B. Burning capacity
• C. Heat radiation
• D. Bearing capacity

Explanation: A bolometer detects and measures radiant energy by sensing the temperature change produced when radiation is absorbed. It is especially used for measuring heat radiation.

1563. Mohus scale is used for to measure ____________?

• A. Hardness
• B. Humidity
• C. Pressure
• D. Temperature

Explanation: The Mohs scale ranks minerals by scratch resistance, from talc at 1 to diamond at 10. It measures relative hardness, not humidity, pressure or temperature.

1564. Which amongst the following cannot pass through vacuum?

• A. Light
• B. Radiation
• C. Sound
• D. None of These

Explanation: Sound is a mechanical wave and needs particles of a medium, such as air, water or a solid, to carry its vibrations. Light and other electromagnetic radiation can travel through a vacuum.

1565. Night vision is possible with the help of ___________?

• A. Red light
• B. Violet light
• C. Infrared Rays
• D. Ultra violet Light
• E. None of these

Explanation: Infrared radiation is used by many night-vision devices because it can be detected in darkness and is often emitted or reflected by warm objects. Red light may preserve dark adaptation but is not the basis of infrared night vision.

1566. A fathom is equal to ________feets?

• A. 6
• B. 5
• C. 4
• D. 3

Explanation: A fathom is an old nautical unit of length equal to 6 feet, or about 1.83 metres. It is commonly used to state water depth.

1567. What is a Geiger Counter used to measure?

• A. Radioactivity
• B. Pressure
• C. Water flow
• D. None of these

Explanation: A Geiger counter detects and counts ionising radiation, such as alpha, beta and gamma radiation, using a Geiger-Müller tube. It is therefore used to indicate radioactivity rather than pressure or water flow.

1568. What measurement scale is used to determine wind speed?

• A. Richter Scale
• B. Beaufort Scale
• C. Meter-second scale
• D. None of these

Explanation: The Beaufort scale classifies wind force by observing its effects, ranging from calm conditions to hurricane-force winds. The Richter scale measures earthquake magnitude, not wind.

1569. Which diagnostic scan gives some of the highest radiation doses in diagnostic radiography ?

• A. CT-Scan
• B. Ultrasound
• C. MRI
• D. X-Ray

Explanation: CT scans use many X-ray exposures to create cross-sectional images, so they generally deliver more radiation than a routine X-ray. Ultrasound and MRI use no ionising radiation.

1570. Velometer is used to measure?

• A. Rain
• B. Speed of Air
• C. Wind pressure
• D. Heat

Explanation: A velometer, or anemometer-type instrument, measures the speed of moving air or wind. It does not directly measure rainfall, heat, or wind pressure.