Main Subjects
Main Subjects MCQs With Answers
0 Main Subjects MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
Computer (406)
Current Affairs (1218)
English (1391)
Everyday Science (687)
General Knowledge (681)
Islamic Studies (850)
Mathematics (1392)
Pakistan Studies (811)
What is the SI unit used to measure energy?
AJoule
BNewton
CWatt
DPascal
According to Archimedes’ principle, the buoyant force on a submerged object equals what?
AThe density of the object
BThe volume of the object
CThe weight of the fluid displaced by the object
DThe weight of the object itself
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
What is the standard value of atmospheric pressure at sea level?
A7,600 mmHg
B76 mmHg
C760 mmHg (1 atmosphere)
D0.76 mmHg
Which part of the human eye detects light and forms images that are sent to the brain?
ACornea
BRetina
CPupil
DIris
Which structure in the human body is primarily responsible for gas exchange between air and blood?
ALiver
BKidneys
CHeart
DLungs, specifically the alveoli