IOCL Junior Operator Fitter MCQ || IOCL Junior Operator General Science Questions and Answers111. What is a "safe edge" on a hand file?1 . An edge with very fine teeth 2 . An edge that is rounded 3 . An edge with no teeth 4 . An edge that is hardened Answer and SolutionAnswer: "An edge with no teeth " A safe edge on a hand file is an edge without teeth. The presence of the safe edge makes these files particularly useful for filing surfaces that are at right angles to already finished surfaces, allowing for precision work without compromising the quality of adjacent areas. Discuss112. Which of the following statements is true about flat files?1 . Specialized files 2 . General purpose files 3 . Precision files 4 . Heavy-duty files Answer and SolutionAnswer: "General purpose files " Flat files are considered general-purpose files because they are versatile and can be used for a wide range of applications in various trades, such as metalworking and woodworking. Their design allows them to handle different materials and tasks effectively. Discuss113. Hand files are especially useful for filing surfaces that are:1 . At right angles to a finished surface 2 . Inaccessible 3 . Curved 4 . Very large Answer and SolutionAnswer: "At right angles to a finished surface " Hand files are particularly useful for filing surfaces that are at right angles to surfaces already finished. This is because they have a “safe edge,” which is an edge without teeth, allowing the user to file adjacent surfaces without damaging them. Discuss114. What is the cross-sectional shape of a square file?1 . Rectangular 2 . Triangular 3 . Square 4 . Round Answer and SolutionAnswer: "Square "A square file has a square cross-sectional shape. This design is specifically useful for filing square or rectangular slots, grooves, or holes. Discuss115. Square files are commonly used for working on:1 . Rectangular openings 2 . Circular openings 3 . Irregular shapes 4 . External curves Answer and SolutionAnswer: "Rectangular openings " Square files are commonly used for working on rectangular openings. Square files have a square cross-section, which makes them ideal for enlarging and shaping square or rectangular openings, grooves, and keyways. They can effectively file edges and corners, ensuring precise work on these types of surfaces. Discuss116. What is the cross-sectional shape of a round file?1 . Triangular 2 . Square 3 . Circular 4 . Rectangular Answer and SolutionAnswer: "Circular " A round file is circular in its cross-section. This shape makes it ideal for enlarging circular holes, smoothing inside holes and circular grooves, and filing profiles with fillets. Discuss117. Which of the following is a common use for a round file?1 . Filing flat surfaces 2 . Enlarging circular holes 3 . Filing square corners 4 . Cutting metal sheets Answer and SolutionAnswer: "Enlarging circular holes " A round file is circular in its cross-section. This shape makes it ideal for enlarging circular holes, smoothing inside holes and circular grooves, and filing profiles with fillets. Discuss118. What is the cross-sectional shape of a half-round file?1 . Triangular 2 . Square 3 . Rectangular 4 . A segment of a circle Answer and SolutionAnswer: "A segment of a circle " A half-round file has one flat side and one curved side, resembling a semicircle or a segment of a circle. It’s designed to work on internal curved surfaces. Discuss119. What type of surface is a half-round file best suited for filing?1 . External flat surfaces 2 . Internal curved surfaces 3 . External curved surfaces 4 . Internal flat surfaces Answer and SolutionAnswer: "Internal curved surfaces "Half-round file is ideal for filing internal curved surfaces, grooves. Discuss120. What is the cross-sectional shape of a knife edge file?1 . Round 2 . Square 3 . Sharp triangle 4 . Half-round Answer and SolutionAnswer: "Sharp triangle " A knife-edge file has a cross-section resembling a sharp triangle. It is designed for filing narrow grooves and angles above 10°. The acute angle of the “blade” makes these files very versatile for smoothing and deburring tighter internal corners. Discuss12345678910111213
