IOCL Junior Operator Fitter MCQ || IOCL Junior Operator General Science Questions and Answers51. Which of the following vices allows for quick adjustment of the jaw opening using a trigger or lever?1 . Pipe vice 2 . Hand vice 3 . Quick releasing vice 4 . Toolmaker’s vice Answer and SolutionAnswer: "Quick releasing vice " Quick Release Vices are designed with a mechanism (often a trigger or lever) that allows for rapid opening and closing of the jaws. This makes them ideal for situations where you need to quickly clamp and release workpieces repeatedly. Discuss52. A quick releasing vice is most similar in appearance and basic function to which other type of vice?1 . Pin vice 2 . Pipe vice 3 . Ordinary bench vice 4 . Toolmaker’s vice Answer and SolutionAnswer: "Ordinary bench vice " A quick-release vise is most similar in appearance and basic function to an ordinary bench vise. Like a bench vise, it’s designed to hold a workpiece securely in place. The key difference is the addition of a quick-release mechanism that allows for rapid adjustment of the jaws. Discuss53. In a quick releasing vice, what action disengages the nut from the screw, allowing rapid jaw movement?1 . Tightening the main screw 2 . Pressing the trigger or lever 3 . Rotating the handle 4 . Loosening the locking mechanism Answer and SolutionAnswer: "Pressing the trigger or lever " In a quick-release vise, you need to press the trigger or lever for rapid jaw movement. This disengages the nut from the screw, and the jaw can be easily slide back and forth. When the vice is tightened, the screw threads engage with the nut, holding the jaws firmly in place. Pressing the trigger or lever activates a mechanism that temporarily disconnects the nut from the screw threads. Discuss54. What type of workpieces is a pipe vice specifically designed to hold?1 . Flat, rectangular pieces 2 . Round sections, tubes, and pipes 3 . Thin sheets of metal 4 . Small, delicate parts Answer and SolutionAnswer: "Round sections, tubes, and pipes " A pipe vise is specifically designed to hold round sections, tubes, and pipes. Its jaws are round or V-shaped, which allows it to firmly grip items that are not straight and flat. Discuss55. How does the movable jaw of a pipe vice operate?1 . Vertically 2 . Horizontally 3 . Diagonally 4 . It doesn’t move Answer and SolutionAnswer: "Vertically " The movable jaw of a pipe vice typically operates Vertically. In a pipe vice, there are two set screws in the movable jaw that allow the jaw to move vertically when the handle is operated. This arrangement allows the jaw to move up and down without rotating. Discuss56. How many points of contact does a pipe vice typically make with the workpiece?1 . Two 2 . Three 3 . Four 4 . Six Answer and SolutionAnswer: "Four " The pipe vice grips the work piece at four points on its surface. When a pipe or work piece is placed in a pipe vice, it makes contact with both sides of the “V” on each jaw, resulting in a total of four contact points. Discuss57. What is the primary purpose of a hand vice?1 . Holding large workpieces 2 . Gripping small objects like screws and rivets 3 . Cutting metal 4 . Measuring dimensions Answer and SolutionAnswer: "Gripping small objects like screws and rivets "he primary purpose of a hand vice is Gripping small objects like screws and rivets. A hand vice is designed to grip small objects tightly while working on them. This can include holding small items while grinding, drilling, filing, hammering, sanding, or shaping. Hand vices are specifically designed to hold small items such as screws, rivets, keys, and small drills. They are ideal for objects that are too small to be effectively held in a larger bench vice, allowing for precision work on tiny components. Hand vices provide a secure grip, making them useful for various tasks like drilling, filing, or shaping small parts. Discuss58. What is the approximate length range for hand vices?1 . 50 to 75 mm 2 . 200 to 250 mm 3 . 300 to 350 mm 4 . 125 to 150 mm Answer and SolutionAnswer: "125 to 150 mm "The approximate length range for hand vices is 50 to 75 mm. RANGE Width of Jaws MM Length Overall MM 3 Inches 30 75 4 Inches 35 100 5 Inches 40 125 6 Inches 50 150 8 Inches 55 200 Discuss59. What is the approximate jaw width range for hand vices?1 . 10 to 20 mm 2 . 60 to 80 mm 3 . 40 to 44 mm 4 . 100 to 120 mm Answer and SolutionAnswer: "40 to 44 mm " The approximate jaw width range for hand vices is 40 to 44 mm. Hand vices are designed for holding small objects, Discuss60. How are the jaws of a hand vice opened and closed?1 . By using a wing nut on a screw 2 . By sliding the jaws 3 . By pressing a button 4 . By using a lever Answer and SolutionAnswer: "By using a wing nut on a screw "The jaws of a hand vice are opened and closed by using a wing nut on a screw. Screw Mechanism: A threaded screw fastened through one leg of the hand vice and is connected to the movable jaw. Wing Nut: A wing nut is attached to the screw. Opening and Closing: By turning the wing nut, you rotate the screw, which moves the movable jaw closer or further away from the fixed jaw, opening or closing the vice. Discuss12345678910111213
