ISRO Technician-B Fitter Question Paper - 2018 (Set - 1) with Answer Key

Ratchet stop is present at the end of thimble cap to maintain a uniform measuring pressure. By ratchet stop standard conditions of measurement are attained.

Zero error in micrometer means, zero on thimble and datum line on sleeve do not coincide when measuring faces are in contact.

Dial Test Indicator Tools. Also known as a dial indicator or dial gauge, a dial test indicator (DTI) is a device used in various applications where small distances need to be measured accurately, such as checking run out on brake disks or end float on a crankshaft and concentricity of the outside diameter.

Gauges are used to check the components only to ensure that the sizes are within the prescribed limits in mass production work.