IOCL Junior Operator Fitter MCQ || IOCL Junior Operator General Science Questions and Answers

Files are specified according to several key characteristics that determine their performance and application:

• Length: This refers to the overall size of the file, which can affect how it is used for different tasks.
• Grade: This indicates roughness of the teeth (e.g., bastard, second cut, smooth).
• Cut: This describes the arrangement and type of teeth on the file (e.g., single cut, double cut, rasp cut), which influences how effectively it can remove material.
• Shape: Files come in various shapes (e.g., flat, half-round, triangular), each suited for specific filing tasks.

The length of a file is measured from the tip to the heel.

• Tip: This is the pointed end of the file that is used for cutting or shaping material.
• Heel: This is the end of the file that is closest to the handle, where the tang is located.

Measuring from the tip to the heel gives a clear indication of the working length of the file, which is important for selecting the right size for specific tasks. This measurement helps users understand how much surface area they can cover while filing.

File grades are determined by the spacing of the teeth, which indicates the coarseness or fineness of the file. The terms used to describe the grades are:

• Bastard: For general-purpose filing.
• Second cut: For better finish than a bastard cut.
• Smooth: For producing a smooth finish.
• Dead smooth: For an even smoother finish.

• A rough file quickly removes lots of material, especially from the edges of soft metal castings.
• Files come in different grades (rough, bastard, etc.) based on how coarse the teeth are.
• Rough files have the biggest teeth for fast removal.

The file best suited for heavy reduction of material is the Bastard file.

• Bastard File: Bastard files are used when a significant amount of material needs to be removed quickly. They have a relatively high material removal rate.
• Rough File: A rough file is used for rapidly removing a larger quantity of metal and trimming the rough edges of soft metal castings.
• Smooth File: Smooth files are used to remove small quantities of material and to give a good finish.
• Dead Smooth File: Dead smooth files are used to bring the material to an accurate size with a high degree of finish, removing very small quantities of metal.

• A second cut file is used to give a good finish on metals and is excellent for filing hard metals.
• It’s useful for bringing jobs close to the finishing size.
• Second cut files have a medium grade and are ideal for removing moderate amounts of stock quickly.
• They leave a finer finish than bastard cut files

• A second cut file is used to give a good finish on metals and is excellent for filing hard metals.
• It is useful for bringing the jobs close to the finishing size.
• Second cut files have a medium grade and are ideal for removing moderate amounts of stock quickly.
• They leave a finer finish than bastard cut files

The number of cutting edges in rows of a file changes according to the Length of the file.

• Longer files are designed to remove more material quickly.
• To achieve this, longer files generally have coarser teeth.
• The coarser teeth allow for a more aggressive cut, making them suitable for initial shaping and material removal.

• A smooth file is specifically designed to remove a small quantity of material while providing a good finish.
• It has closely spaced teeth that allow for fine filing, making it ideal for achieving a polished surface after initial shaping with coarser files.