QUESTION $2$: $(13$ marks$)$

a$)$ What is measurement system and explain the function of measurement as a subsystem in

mechatronics system. $(2$ marks$)$

b$)$ Name $4$ type of displacement sensor $(2$ marks$)$

c$)$ Suggest suitable sensors for the following application $(2$ marks$)$

a$.$ Sensing level of plastic pellets in hopper $($container$).$

b$.$ Sensing parts to transfer to specifically designated areas

c$.$ Sensing vehicle under barrier at car park so the barrier will not lowered down when

there is vehicle underneath.

d$.$ Sensor to automatically switch off unnecessary lighting, air conditioning, etc. when

people are not present

e$)$ Explain the function of following component $(2$ marks$)$

i$.$ hydraulic actuator

ii$.$ Pressure Regulator