micrometer screw gauge

Figure shows a micrometer screw gauge when the jaws are closed.
Rajah menunjukkan sebuah tolok skru mikrometer semasa rahangnya rapat.





(a) Name the part label R
     Namakan bahagian berlabel R.
     .............................................................................................................


(b) What is the function of the part label R?
     Apakah fungsi bahagian berlabel R?
    ...............................................................................................................


(c) What is the value of zero error shown by the mictometer above?
     Berapakah nilai ralat sifar yang ditunjukkan oleh tolok skru mikrometer di atas?
    ...............................................................................................................


(d) Give one reason why the measurement from the micrometer screw gauge is more accurate compare to a vernier callipers?
     Berikan satu sebab tolok skru mikrometer adalah alat yang lebih jitu berbanding dengan angkup vernier.
    ...............................................................................................................






Ratchet
Device on end of handle that limits applied pressure by slipping at a calibrated torque.
 0.00 mm
Boleh mengukur unit lebih kecil iaitu 0.01 mm