IOCL Junior Operator General Science MCQ Part-6 || IOCL Junior Operator General Science Questions and Answers41. What type of point angle is best for chipping soft materials?1 . Wide angles 2 . Sharp angles 3 . 90-degree angles 4 . Any angle Answer and SolutionAnswer: "Sharp angles "Sharp angles cut soft materials more efficiently. Discuss42. What type of point angle is best for chipping hard materials?1 . Sharp angles 2 . Any angle 3 . 45-degree angles 4 . Wide angles Answer and SolutionAnswer: "Wide angles " Wide angles is best for chipping hard materials. Wide angles provide more strength when working with hard materials. Discuss43. What is the rake angle?1 . The angle between the top face of the cutting point and a line perpendicular to the work surface. 2 . The angle of the hammer swing 3 . The angle of the chisel body 4 . The angle of the work piece Answer and SolutionAnswer: "The angle between the top face of the cutting point and a line perpendicular to the work surface. " Rake angle is the angle between the angle between the top face of the cutting point and a line perpendicular to the work surface. The rake angle influences how the chip is formed and removed. Discuss44. What is the clearance angle?1 . The angle of the hammer swing 2 . The angle of the chisel body 3 . The angle between the bottom face of the point and a tangent to the work surface. 4 . The angle of the work piece Answer and SolutionAnswer: "The angle between the bottom face of the point and a tangent to the work surface. " Clearance angle is the angle between the bottom face of the point and a tangent to the work surface. The clearance angle prevents the chisel from rubbing against the work surface. Discuss45. What happens if the clearance angle is too low?1 . The chisel cuts too deeply. 2 . The chisel breaks. 3 . The chisel becomes dull. 4 . The chisel slips on the work surface. Answer and SolutionAnswer: "The chisel slips on the work surface. " If the clearance angle is too low the chisel slips on the work surface. A low clearance angle prevents the cutting edge from engaging the material. Discuss46. What happens if the clearance angle is too high?1 . The chisel slips. 2 . The chisel becomes dull. 3 . The chisel digs into the work too deeply. 4 . The chisel vibrates excessively. Answer and SolutionAnswer: "The chisel digs into the work too deeply. " If the clearance angle is too high the chisel digs into the work too deeply. A high clearance angle causes the chisel to cut aggressively and uncontrollably. Discuss47. Why is crowning applied to a chisel's cutting edge?1 . To make the chisel sharper 2 . To make the chisel longer 3 . To prevent the chisel from digging into corners and breaking. 4 . To make the chisel easier to hold Answer and SolutionAnswer: "To prevent the chisel from digging into corners and breaking. "Crowning helps prevent the chisel from catching and breaking during use. Discuss48. What does crowning allow the chisel to do during chipping?1 . Cut faster 2 . Move freely along a straight line. 3 . Cut deeper 4 . Make smoother cuts Answer and SolutionAnswer: "Move freely along a straight line. " Crowning allow the chisel to move freely along a straight line. Crowning aids in straight, controlled cuts. Discuss12345
