ISRO Technician-B Fitter Question Paper - 2017 (Set - 1) with Answer Key

The portion of the broad part without teeth in a file is known as Heel.

The angle between the teeth and the centre line in single cut file is 60 degree.

A single cut file has rows of teeth cut in one direction across its face. The teeth are at an angle of 600 to the centre line. It can cut chips as wide as the cut of the file. Files with this cut are useful for filing soft metals like brass, aluminium, bronze and copper.

The shape of a rasp cut file is Half round.

The try-square is a precision instrument which is used to check the squareness of a surface and the flatness of surfaces.