0 Comment

Practice Test: Question Set - 17

1. In centreless grinding, work place centre will be
    (A) Above the line joining the two wheel centres
    (B) Below the line joining the two wheel centres
    (C) On the line joining the two wheel centres
    (D) At the intersection of the line joining the wheel centres with the work place plane

2. The hardness of a grinding wheel is specified by
    (A) Brinell hardness number
    (B) Rockwell hardness number
    (C) Vickers pyramid number
    (D) Letter of alphabet

3. The maximum production of small and slender parts is done by
    (A) Watch maker's lathe
    (B) Sliding head stock automatic lathe
    (C) Multi-spindle automatic lathe
    (D) Capstan lathe

4. The size of a shaper is given by
    (A) Stroke length
    (B) Motor power
    (C) Mass of machine
    (D) Rate size

5. An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as
    (A) Counter-boring
    (B) Grooving
    (C) Knurling
    (D) Facing

6. If the cutting speed is increased, then the built-up-edge
    (A) Becomes longer
    (B) May or may not form
    (C) Becomes smaller and finally does not form at all
    (D) Has nothing to do with speed

7. The method of grinding used to produce internal cylindrical holes and tapers, is
    (A) Internal cylindrical grinding
    (B) Form grinding
    (C) External cylindrical grinding
    (D) Surface grinding

8. In machining metals, surface roughness is due to
    (A) Feed marks or ridges left by the cutting tool
    (B) Fragment of built-up edge on the machined surface
    (C) Cutting tool vibrations
    (D) All of these

9. The usual value of the helix angle of a drill is
    (A) 20°
    (B) 30°
    (C) 45°
    (D) 60°

10. Which of the following statement is correct for orthogonal cutting system?
    (A) The cutting edge of the tool is perpendicular to the direction of tool travel
    (B) The cutting edge clears the width of the workpiece on either ends
    (C) The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge
    (D) All of the above

11. Glazing in grinding wheels takes place when the
    (A) Wheel is too hard or wheel revolves at a very high speed
    (B) Wheel is too soft or wheel revolves at a very slow speed
    (C) Wheel is too hard and wheel revolves at very slow speed
    (D) Wheel is too soft and wheel revolves at a very high speed

12. In reaming process
    (A) Metal removal rate is high
    (B) High surface finish is obtained
    (C) High form accuracy is obtained
    (D) High dimensional accuracy is obtained

13. The tool may fail due to
    (A) Cracking at the cutting edge due to thermal stresses
    (B) Chipping of the cutting edge
    (C) Plastic deformation of the cutting edge
    (D) All of these

14. The cutting speed for drilling copper 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

15. A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to
    (A) Wear of bond
    (B) Breaking of abrasive grains
    (C) Wear of abrasive grains
    (D) Cracks on grinding wheel

Show and hide multiple DIV using JavaScript View All Answers

Post a Comment Blogger