Production Engineering - Set 14 - ObjectiveBooks

Production Engineering - Set 14

Practice Test: Question Set - 14

1. The cutting speed is maximum while machining _________ with a high speed steel tool.
    (A) Cast iron
    (B) Mild steel
    (C) Brass
    (D) Aluminium

2. In drilling brass, a drill with
    (A) Zero helix angle is used
    (B) Low helix angle is used
    (C) High helix angle is used
    (D) Any helix angle can be used

3. In order to obtain a surface finish in the range of 0.75 μm to 1.25 μm , the operation used is called.
    (A) Grinding
    (B) Lapping
    (C) Honing
    (D) Buffing

4. Negative rakes are used for
    (A) Carbide tools
    (B) Heavy loads
    (C) Harder materials
    (D) All of these

5. The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called
    (A) Ceramic
    (B) Stellite
    (C) Diamond
    (D) Cemented carbide

6. Which of the following statement is wrong as regard to down milling?
    (A) It can not be used on old machines due to backlash between the feed screw of the table and the nut.
    (B) The chips are disposed off easily and do not interfere with the cutting.
    (C) The surface milled appears to be slightly wavy.
    (D) The coolant can be poured directly at the cutting zone where the cutting force is maximum.

7. The tail-stock set over required to turn a taper on the entire length of a workpiece having diameters D and d is
    (A) (D - d)/2L
    (B) (D - d)/L
    (C) (D - d)/2
    (D) D - d

8. The abrasive slurry used in ultrasonic machining contains fine particles of
    (A) Aluminium oxide
    (B) Boron carbide
    (C) Silicon carbide
    (D) Any one of these

9. Which of the following statement is incorrect with reference of lathe cutting tools?
    (A) The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
    (B) The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
    (C) The heel is that part of the tool which is shaped to produce the cutting edges and face
    (D) The base is that surface of the shank which bears against the support and takes tangent pressure of the cut

10. The broaching operation in which either the work or the tool moves across the other, is known as
    (A) Pull broaching
    (B) Push broaching
    (C) Surface broaching
    (D) Continuous broaching

11. The negative rake is usually provided on
    (A) High carbon steel tools
    (B) High speed steel tools
    (C) Cemented carbide tools
    (D) All of these

12. The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from
    (A) 10 to 20 m/min
    (B) 18 to 30 m/min
    (C) 24 to 45 m/min
    (D) 60 to 90 m/min

13. In drilling Bakelite and fibrous plastics, the point angle of a drill is
    (A) 90°
    (B) 118°
    (C) 135°
    (D) 150°

14. The chamfering is an operation of
    (A) Beveling the extreme end of a workpiece
    (B) Embossing a diamond shaped pattern on the surface of a workpiece
    (C) Reducing the diameter of a workpiece over a very narrow surface
    (D) Enlarging the end of a hole cylindrically

15. The abrasive recommended for grinding materials of high tensile strength is
    (A) Silicon carbide
    (B) Aluminium oxide
    (C) Sand stone
    (D) Diamond

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