Question I

$|$Soalan I$|$

$($a$)$ Standard measurement is known as a physical representation of ti e unit jeasurement. Explain FOUR $(4)$ different type of standard measurement. ukiran piawai yang berbeza$)$

$(4$ Marks$/$Markith$)$

$($b$)$ A diaphragm type of pressure transducer gives a central deflection of $0\mathrm{.}25$ mm when a pressure of $1\mathrm{.}2{10}^4\frac{N}{m^{\text{'}}}$ is applied. An electromechanical device namely a linear variable differential transducer $($LVDT$)$ converts the input displacement of the pressure transducer into voltage and has a sensitivity of $60\frac{V}{m}m.$ the output is displayed on an analog voltmeter which has a radius of scale line as $60$ mm and has a voltage range from zero to $10$ volts in an are of $150.$

$($Diafragma jenis transduser tekanan memberikan pesongan pusat $0\mathrm{.}25$ mm apabila tekanan $1\mathrm{.}2100\frac{N}{m^{\text{'}}}$ dikenakan. Peranti elektromekanikal iaitu Iransduser pembezaan pembolehubah linear $($LVDT$)$ menukarian sesaran input transduser tekanan kepada voltan dan mempunyai kepekaan $60\frac{V}{m}m$ output dipaparian pada voltmeter analog yang mempunyai jejari garis skala sebagai $60$ mm dan mempunyai julat voltan dari sifar hingga $10$ volt dalam lengkok $150.$

$($i$)$ Draw block diagram of functional elements of the diaphragm type pressure transducer mentioned in Q$\mathrm{.}1.$b$.$

$[$Lukis gambarajah blok unsur$-$unsur berfungsi transduser tekanan jenis diafragma yang disebut dalam Q$.$I.b$.$J

$(4$ Marks$/$Markah$)$

$($ii$)$ Calculate the overall sensitivity of the pressure gauge.

$[$Kira sensitiviti keseluruhan tolok tekanan.$]$

$(6$ Marks$/$Markah$)$

$($iii$)$ Calculate the resolution of the instrument. if $0\mathrm{.}5$ mm seale division can be read fazly. $[$Kirakan resolusi instrumen.$]$

$(2$ Marks$/$Markah$)$

$($c$)$ Error can be classified into three types. Define error and distinguish all THREE $(3)$ different class of errors.

$[$Ralat boleh dikelaskan kepada tiga jenis. Definisikan ralat dan bezakan semua TIGA $(3)$ kelas ralat yang berbeza.$]$

$(4$ Marks$/$Markah$)$