General Science and Technology Quiz

Candles CAN burn in zero gravity. In microgravity (like the International Space Station), candle flames become spherical instead of teardrop-shaped due to the absence of convection currents. The flame is blue and burns more slowly but does burn.

Electricity, specifically electric current in a conductor, is defined as the flow of electric charge. In most electrical circuits, this charge is carried by moving electrons. Therefore, the statement is fundamentally true in the context of basic physics.

Goldfish produce melanin (pigment) in response to light. In darkness, they gradually lose their color and become paler or white over time. This is an adaptive response. They don't turn black or stay the same color.

The normal resting heart rate for a healthy adult is typically 60-100 beats per minute, with 72 bpm being the most commonly cited average in medical literature. Option A represents this standard value, while options C and D are above the normal range.

Mirages are optical phenomena caused by atmospheric refraction - light bends when passing through air layers of different temperatures (hot near the ground, cooler above). This creates illusory images of water or distant objects, commonly seen on hot roads or in deserts.

TAB stands for Thermactor Air Bypass solenoid. This is a component in Ford's 'Thermactor' secondary air injection system used for emission control. It bypasses air pump flow to the atmosphere under certain engine conditions. The other options are incorrect variations of the term.

Nicolaus Copernicus formulated a model of the universe that placed the Sun rather than the Earth at the center, which inherently required the Earth to be a rotating sphere. While Galileo supported this, Copernicus is credited with the primary declaration that challenged the flat/stationary Earth model.

In automotive engineering, TAC stands for Thermostatic Air Cleaner. It is a system that regulates the temperature of the air entering the engine's air cleaner to improve driveability and reduce emissions during warm-up. The other options are plausible-sounding but incorrect variations.

Short-sightedness (myopia) occurs when the eye focuses light in front of the retina. Concave lenses diverge light rays before they enter the eye, shifting the focal point back onto the retina. Convex lenses are used for long-sightedness (hyperopia).

TAD stands for Thermactor Air Diverter solenoid, a component in vehicle emissions control systems that directs air flow for reducing pollutants. It's part of Ford's Thermactor air injection system used in some engines.

Nicotine is the primary toxic and addictive alkaloid found in the tobacco plant. Caffeine is found in coffee and tea, while heroin is a semi-synthetic opioid derived from morphine. Nicotine acts as both a stimulant and a sedative in humans.

TAEE stands for Tertiary Amyl Ethyl Ether. It is an oxygenate used as a gasoline additive to increase octane ratings and reduce emissions. The other options use incorrect chemical suffixes like 'ethane' or 'ethyne' which do not match the standard chemical acronym.

Oxygen makes up approximately 21% of Earth's atmosphere by volume, which is roughly 1/5th. Nitrogen is the main component at about 78%, with trace gases making up the remaining 1%.

TASE stands for Thermal-Aerodynamic Systems Engineering, a discipline in aerospace engineering dealing with thermal and aerodynamic system design and optimization. Option B is incomplete, and options C and D incorrectly substitute "Suction" for "Systems".

Weight is the gravitational force acting on an object. The Moon's gravity is about 1/6th of Earth's gravity, so a person weighs much less on the Moon while their mass remains constant.

MAC typically stands for Motor Assisted Cycle in vehicle classification. It refers to bicycles with small auxiliary motors that provide pedaling assistance.

Ice floats only in liquids denser than itself. Ice density is about 0.92 g/cm³ while alcohol (ethanol) density is about 0.79 g/cm³. Since ice is denser than alcohol, it sinks rather than floats.

MAFRTN stands for Mass Air Flow Sensor Ground in automotive electrical systems. It's the ground connection for the mass airflow sensor which measures air entering the engine.

Tungsten has the highest melting point of all metals (3422°C) and excellent strength at high temperatures, making it ideal for light bulb filaments that must withstand intense heat without melting.

HAC stands for High Altitude Compensator in automotive systems. It adjusts the fuel-air mixture to compensate for thinner air at higher altitudes, maintaining proper engine performance.