All Free Everyday Science MCQs with Answers

1681. 1 Coulomb = ___________ e.

• A. 6×10-19
• B. 6.25×1018
• C. 1.6×1019
• D. 6.25×10-18

Explanation: One coulomb equals the charge of approximately 6.25 × 10^18 electrons, since the charge of one electron is about 1.6 × 10^-19 coulomb. The negative sign belongs to each electron’s charge, not to the number of electrons.

1682. Fathom is the unit of measurement for__________?

• A. Sound
• B. Depth
• C. Energy
• D. Time

Explanation: A fathom is a traditional unit of depth, especially for measuring water depth, equal to six feet or about 1.83 metres. It is not a unit of sound, energy, or time.

1683. The study of forces acting upon bodies in motion in the air is called__________?

• A. Aeronautics
• B. Aerophysics
• C. Aerodynamics
• D. Aerofraction

Explanation: Aerodynamics examines how air affects moving bodies, including lift, drag and air resistance. Aeronautics is the broader field concerned with aircraft and flight.

1684. Which of the following cutting conditions greatly affects the tool wear?

• A. Cutting speed
• B. Feed
• C. Depth of cut
• D. None of the above

Explanation: Cutting speed strongly affects tool wear because higher speed raises the cutting temperature and accelerates wear mechanisms. Feed and depth of cut also matter, but cutting speed is usually the dominant condition.

1685. Very High Frequency (VHF) have __________ wavelengths?

• A. shorter
• B. shortest
• C. longer
• D. longest

Explanation: For the same wave speed, wavelength decreases as frequency increases, according to v = fλ. VHF therefore has shorter wavelengths than lower-frequency radio bands, though not necessarily the shortest of all waves.

1686. What do you mean by Phonetics?

• A. Study of speech sounds
• B. Study of language and rules
• C. Study of insects
• D. Study of meaning and syntax

Explanation: Phonetics is the study of speech sounds, including how they are produced, transmitted and heard. The study of meaning and syntax belongs mainly to semantics and grammar, not phonetics.

1687. 1 yard =___________?

• A. 3 feet
• B. 6 feet
• C. 2.4 feet
• D. 12 feet

Explanation: A yard is a traditional length unit equal to three feet or 36 inches. Therefore, 1 yard = 3 feet.

1688. Water is 50 times more viscous than ____________ ?

• A. Oil
• B. Alcohol
• C. Gases
• D. Solid

Explanation: Water is roughly 50 to 55 times more viscous than air at room temperature, so gases is the intended comparison. Liquids such as oil are generally more viscous than water, not less by this ratio.

1689. Newton's Third Law of Motion?

• A. every action there is an equal and opposite reaction.
• B. attraction or repulsion between two charges
• C. volume of a given mass of gas increases or decreases
• D. temperature remaining constant, volume of a given mass of a gas varies inversely

Explanation: Newton’s third law states that interacting bodies exert forces on each other that are equal in magnitude and opposite in direction. The other statements refer to electrostatic force or gas laws, not motion’s third law.

1690. Oil rises up to wick in a lamp because_____________?

• A. Oil is very light
• B. Oil is volatile
• C. Diffusion of oil through the wick
• D. Capillary action phenomenon

Explanation: Liquid oil climbs through the narrow pores of a wick because of capillary action, produced by adhesion to the wick and cohesion within the oil. Its lightness or volatility is not the cause.