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Main Subjects MCQs With Answers
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Which electrical quantity does a voltmeter measure?
AVoltage
BPower
CCurrent
DResistance
What are the main components of LPG, the liquefied petroleum gas used for cooking in many households?
AMethane and ethane
BHydrogen and oxygen
CPropane and butane
DNitrogen and helium
What is the primary function of red blood cells in the human body?
AFighting infections
BProducing antibodies
CTransporting oxygen throughout the body
DClotting blood
Which element has the chemical symbol Na?
ANitrogen
BNeon
CSodium
DNickel
What is the primary function of white blood cells?
ACarrying oxygen
BDigesting food
CClotting wounds
DFighting infections and disease
Which simple machine is a rotating wheel with a grooved rim used to lift loads with a rope or cable?
ALever
BPulley
CInclined plane
DWedge
Which chemical is commonly added to drinking water supplies to kill harmful bacteria and pathogens?
ASodium chloride
BChlorine
CAmmonia
DCalcium carbonate
What is the best natural source of vitamin D for the human body?
AGreen leafy vegetables
BCitrus fruits
CRed meat
DSunlight exposure on the skin