properties of components in systems PG-112 Flashcards
what are electric and mechanical components made from
materials that have special properties
what are systems made from
materials with suitable properties
what are mechanical systems made up of
lots of individual physical parts
what do electronic systems contain
many electrical components, each one has a particular function in the system
what material is often used for vehicle parts
steel
why is steel often used for vehicle parts
strong
easy to work with
malleable
cheap
why are car bodies also made from steel
in an accident its designed to crumple, absorbing most of the impact- this helps protect the passengers
whats an alternative material to steel in motor vehicles
aluminium
why is aluminium sometimes used in motor vehicles instead of steel
its more corrosion-resistant
less dense (lighter) - which improves performace for driving the car
however it is more expensive so is more commonly used in expensive vehicles
what is used to defog a car window
strips of electrically conductive material on the inside of a cars rear window heating to around 30 degrees
why do engines have to be made from materials that can cope with high temperatures
so it doesnt overheat and have to be able to work in freezing conditions too
advantages of rubber/polyurethane
strong- able to resist pulling forces without breaking
flexible- can bend
properties of nickel-chronium alloy
has a high melting point
corrosion resistant
