Introduction to Drilling and Boring Machines
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Questions and Answers

What is the main purpose of a drilling machine in a workshop?

  • Cutting metal into various shapes
  • Creating intricate designs on metal surfaces
  • Producing cylindrical holes in metal workpieces (correct)
  • Polishing and finishing metal products

    • Which part of a drilling machine is responsible for removing metal to create a hole?

  • Drill spindle (correct)
  • Base
  • Table
  • Column

    • What is the purpose of making an indentation with a centre punch before drilling?

  • To align the drill spindle
  • To stabilize the workpiece
  • To measure the hole depth
  • To mark the center of the hole location (correct)

    • Where is the base of a drilling machine typically positioned?

    <p>On a bench, pedestal, or floor (D)</p> Signup and view all the answers

    Which part of a drilling machine allows for adjusting the depth of the hole being drilled?

    <p>Table (D)</p> Signup and view all the answers

    What component of a drilling machine is responsible for driving the drill spindle at different speeds?

    <p>Electric motor (A)</p> Signup and view all the answers

    What is the main purpose of a gang drilling machine?

    <p>Performing multiple operations like drilling and tapping (C)</p> Signup and view all the answers

    What is the function of a multiple spindle drilling machine?

    <p>Drilling a number of holes simultaneously (D)</p> Signup and view all the answers

    Which factor is NOT considered when specifying a drilling machine?

    <p>Material used to make the drill (B)</p> Signup and view all the answers

    Why is it important to use work holding devices in a drilling machine?

    <p>To prevent injuries to the operator and damage to the machine (B)</p> Signup and view all the answers

    Which tool is used for enlarging and finishing a previously drilled hole?

    <p>Reamer (A)</p> Signup and view all the answers

    What is the main characteristic of twist drills used in shop work?

    <p>Have a straight flute design (C)</p> Signup and view all the answers

    Which type of drilling machine requires high cutting speeds and less feed to drill deep holes?

    <p>Deep hole drilling machine (A)</p> Signup and view all the answers

    In a multiple spindle drilling machine, how are all the spindles driven?

    <p>A single motor using gears drives all spindles (D)</p> Signup and view all the answers

    'T' - bolts and clamps are examples of:

    <p>'T' - bolts and clamps (C)</p> Signup and view all the answers

    'Flute' is a term associated with which tool used in drilling machines?

    <p>'Twist drill' (D)</p> Signup and view all the answers

    What type of material are straight fluted tools typically used for machining?

    <p>Brass (B)</p> Signup and view all the answers

    Which tool is used for enlarging the top of holes conically?

    <p>Countersink (D)</p> Signup and view all the answers

    What is the angle range generally found in countersinks?

    <p>60° - 90° (B)</p> Signup and view all the answers

    Taps have threads similar to which common object?

    <p>Bolt (D)</p> Signup and view all the answers

    What part of a twist drill is responsible for maintaining the alignment and ensures the hole is straight?

    <p>Land (C)</p> Signup and view all the answers

    Lips in a twist drill are formed by the intersection of which two parts?

    <p>Flank and face (B)</p> Signup and view all the answers

    Which type of drilling machine is designed for drilling small holes at high speeds in light jobs?

    <p>Sensitive drilling machine (B)</p> Signup and view all the answers

    What is the main feature that distinguishes a portable drilling machine from a standard drilling machine?

    <p>Portability (D)</p> Signup and view all the answers

    What is the function of the column in a sensitive drilling machine?

    <p>Supporting the work table (C)</p> Signup and view all the answers

    Which drilling machine can accommodate workpieces of different heights by adjusting the table vertically?

    <p>Upright drilling machine (C)</p> Signup and view all the answers

    What feature makes the radial drilling machine suitable for drilling on medium to large and heavy workpieces?

    <p>Swinging drill head (A)</p> Signup and view all the answers

    What is NOT a typical characteristic of a sensitive drilling machine?

    <p>$50-2000$ r.p.m. spindle rotation (A)</p> Signup and view all the answers

    Which drilling machine is named based on its ability to make holes in different positions and orientations?

    <p>Radial drilling machine (A)</p> Signup and view all the answers

    What sets the portable drilling machine apart from other types of machines?

    <p>'V'-belt transmission (C)</p> Signup and view all the answers

    What is a key difference between a sensitive and an upright drilling machine?

    <p>'T'-slots on the table with power feed arrangement (C)</p> Signup and view all the answers

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