DRILLING MCQ
Drilling_Manufacturing Process II_Important MCQs for Semester & Other Examinations
1.
1. Drilling is an example of –
(a) Orthogonal Cutting,
(b) Oblique Cutting,
(c) Simple cutting,
(d) Uniform Cutting.
2. It is desired to perform the machining operations like drilling, reaming, counter boring, etc. on a work piece. Which of the following machines should be used?
(a) Sensitive Drilling Machine,
(b) Radial Drilling Machine,
(c) Gang Drilling Machine,
(d) Multiple Spindle Drilling Machine.
3. In which of the following machines, work is usually rotated and the drill is fed into the work?
(a) Sensitive Drilling Machine,
(b) Radial Drilling Machine,
(c) Gang Drilling Machine,
(d) Deep Hole Drilling Machine.
4. The drill Spindles are provided with standard taper known as –
(a) Morse Taper,
(b) Seller’s Taper,
(c) Chapman Taper,
(d) Brown & Shrape Taper.
5. Trepanning is an operation of –
(a) making a cone shaped enlargement at the end of a hole,
(b) smoothing and squaring the surface around a hole,
(c) sizing & finishing a small diameter hole,
(d) producing a hole by removing metal along the circumference of a hollow cutting tool.
6. Counter-sinking is an operation of -
(a) making a cone shaped enlargement at the end of a hole,
(b) smoothing and squaring the surface around a hole,
(c) sizing & finishing a small diameter hole,
(d) producing a hole by removing metal along the circumference of a hollow cutting tool.
7. Spot facing is an operation of –
(a) making a cone shaped enlargement at the end of a hole,
(b) smoothing and squaring the surface around a hole,
(c) sizing & finishing a small diameter hole, (is called lapping, it is a finishing process)
(d) producing a hole by removing metal along the circumference of a hollow cutting tool.
8. The cutting speed for a counter boring operation is usually _____ than a drilling operation.
(a) Equal,
(b) less,
(c) grater.
9. A twist drill is a _______ cutting tool.
(a) side cutting tool,
(b) end cutting tool,
(c) Front cutting tool,
(d) None of these.
10. The drill bit considered as a cutting tool having zero rake angle, is known as-
(a) flat drill,
(b) straight fluted drill,
(c) parallel shank twist drill,
(d) taper shank twist drill.
11. The angle formed by leading edge of the land with a plane having axis of the drill is called –
(a) Helix or Rake angle,
(b) Point Angle,
(c) Chisel Edge Angle,
(d) Lip Clearance Angle.
12. The angle included between the two lips projected upon a plane parallel to the drill axis & parallel to the two cutting lips, is called –
(a) Helix or Rake angle,
(b) Point Angle,
(c) Chisel Edge Angle,
(d) Lip Clearance Angle.
13. The angle formed by the flank and a plane right angle to the drill axis is called –
(a) Helix or Rake angle,
(b) Point Angle,
(c) Chisel Edge Angle,
(d) Lip Clearance Angle.
14. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill is called –
(a) Helix or Rake angle,
(b) Point Angle,
(c) Chisel Edge Angle,
(d) Lip Clearance Angle.
15. The rake angle of a single point cutting tool corresponds to the ______ angle of a twist drill.
(a) Helix angle,
(b) Point Angle,
(c) Chisel Edge Angle,
(d) Lip Clearance Angle.
16. The usual value of a helix angle of a drill is –
(a) 20°,
(b) 30°,
(c) 45°,
(d) 60°.
17. The usual value of a point angle of a drill is –
(a) 70°,
(b) 100°,
(c) 118°, (Mild Steel)
(d) 130°.
18. In drilling bakelite and fibrous plastics, the point angle is usually kept –
(a) 90°,
(b) 118°,
(c) 135°,
(d) 150°.
19. The point angle of a drill bit for drilling stainless steel is usually kept –
(a) 90°,
(b) 118°,
(c) 135°,
(d) 150°.
20. In drilling mild steel, the point angle is usually kept –
(a) 90°,
(b) 118°,
(c) 135°,
(d) 150°.
21. In drilling brass, a drill bit with –
(a) zero helix angle is used,
(b) high helix angle is used,
(c) low helix angle is used,
(d) any helix angle is used.
22. In drilling aluminum, a drill bit with –
(a) zero helix angle is used,
(b) high helix angle is used,
(c) low helix angle is used,
(d) any helix angle is used.
23. A tool used to withdraw a tool from the sleeve is called –
(a) drill remover,
(b) drill puller,
(c) drift,
(d) drill drawer.
24. The drill bit, generally used for drilling softer materials like brass, copper etc. is a –
(a) flat drill,
(b) straight fluted drill,
(c) parallel shank twist drill,
(d) taper shank twist drill.
25. The cutting angle of a flat drill varies from -
(a) 3° to 8°,
(b) 20° to 30°,
(c) 60° to 90°,
(d) 90° to 120°.
26. The main purpose of boring operation is to –
(a) drill a hole,
(b) finish the drilled hole,
(c) correct the hole,
(d) enlarge an existing hole.
27. The relief or clearance angle at the cutting edge of a flat drill varies from –
(a) 3° to 8°,
(b) 20° to 30°,
(c) 60° to 90°,
(d) 90° to 120°.
28. The cutting speed of a drill varies from point to point on the cutting edge of the drill.
(a) True,
(b) False.
29. The cutting speed of drill is zero at the periphery and it is maximum at the center.
(a) True,
(b) False.
30. A twist drill is specified by –
(a) shank, material & diameter,
(b) shank, lip angle & size of flute,
(c) material length of the body & helix angle,
(d) any one of the given.
31. The cutting speed of a drill depends upon the –
(a) material of the drill bit,
(b) type of material to be drilled,
(c) quality of surface finish desired,
(d) all of the above.
32. The cutting speed for drilling aluminum, brass & bronze with high speed steel drill bit lies between –
(a) 10 to 20 m/min,
(b) 18 to 30 m/min,
(c)24 to 45 m/min,
(d) 60 to 90 m/min.
33. The cutting speed for drilling mild steel with high speed steel drill bit lies between –
(a) 10 to 20 m/min,
(b) 18 to 30 m/min,
(c) 24 to 45 m/min,
(d) 60 to 90 m/min.
34. The cutting speed for drilling copper with high speed steel drill bit lies between-
(a) 10 to 20 m/min,
(b) 18 to 30 m/min,
(c) 24 to 45 m/min,
(d) 60 to 90 m/min.
Note:
cutting speed for drilling with high speed steel (HSS) bit -
aluminum, brass & bronze - 60 to 90 m/min
mild steel - 24 to 45 m/min
copper - 18 to 30 m/min
stinless steel (SS) - 10 to 20 m/min
35. In drilling softer materials, the cutting speed is _____ as compared to the harder materials.
(a) same,
(b) low,
(c) high,
(d) any one.
36. High speed steel (HSS) drill bits can be operated at about ____ the speed of high carbon steel (HCS) drill bits.
(a) one-half,
(b) one-fourth,
(c) double,
(d) four times.
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