Everyday Science
Everyday Science MCQs With Answers
741 Everyday Science MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
What energy conversion takes place inside an electrical generator?
AMechanical energy into electrical energy
BElectrical energy into mechanical energy
CChemical energy into light energy
DHeat energy into chemical energy
What causes water to be classified as hard water?
AExtremely low temperature
BThe presence of dissolved calcium and magnesium salts
CThe presence of dissolved oxygen only
DThe presence of dissolved sugar
What term describes the mixture of smoke and fog that reduces visibility and air quality in polluted urban areas?
AHaze storm
BFrost
CSmog
DAcid mist
What technology uses radio waves to detect the distance, speed, and direction of objects like aircraft?
ARadar
BSonar
CLidar using sound
DUltrasound
Which purification technique separates a mixture of liquids based on differences in their boiling points?
AFiltration
BChromatography
CDecantation
DDistillation
Acid rain, which can damage forests, buildings, and aquatic ecosystems, is primarily caused by which type of air pollutants?
ACarbon monoxide alone
BExcess water vapor with no pollutants involved
CSulfur dioxide and nitrogen oxides reacting with atmospheric water vapor
DExcess oxygen in the atmosphere
Why does an object made of a material denser than water sink when placed in water?
ABecause it lacks air inside it
BBecause water always sinks lighter objects
CBecause it has too much surface area
DBecause its weight exceeds the buoyant force provided by the displaced water
Pascal’s principle, which explains how hydraulic systems like car brakes work, states that pressure applied to a confined fluid does what?
AConverts entirely into heat
BOnly affects the point where it is applied
CDecreases as it moves through the fluid
DIs transmitted equally throughout the fluid in all directions
Bernoulli’s principle, often used to help explain how airplane wings generate lift, relates fluid speed to what?
AFluid color
BFluid pressure
CFluid temperature only
DFluid mass only
Convex mirrors, which show a wider field of view, are commonly used for which everyday purpose?
ACamera lenses only
BVehicle side and rear-view mirrors
CBathroom mirrors
DReading glasses