Practice Test: Question Set - 20
1. Tool life is measured by the
- (A) Number
of pieces machined between tool sharpenings
- (B) Time the
tool is in contact with the job
- (C) Volume
of material removed between tool sharpenings
- (D) All
of the above
2. A diamond locating pin is used in jigs and fixtures because
- (A) Diamond
is very hard and wear resistant
- (B) It
occupies very little space
- (C) It
helps in assembly with tolerance on centre distance
- (D) It
has a long life
3. Surface grinding is done to produce
- (A) Tapered
surface
- (B) Flat surface
- (C) Internal
cylindrical holes
- (D) All of these
4. Relief angles on high speed steel tools usually vary from
- (A) 0° to 3°
- (B) 3° to 10°
- (C) 10° to 20°
- (D) 20° to 30°
5. The tool material, for faster machining, should have
- (A) Wear
resistance
- (B) Red
hardness
- (C) Toughness
- (D) All of these
6. High speed steel cutting tools operate at cutting speeds _________ than carbon steel tools.
- (A) 2 to 3 times
lower
- (B) 2 to 3 times
higher
- (C) 5 to 8 times
higher
- (D) 8 to 20
times higher
7. In a plain milling machine, the table can be moved
- (A) Longitudinally
- (B) Crosswise
- (C) Vertically
- (D) All of these
8. Crater wear leads to
- (A) Increase
in cutting temperature
- (B) Weakening
of tool
- (C) Friction
and cutting forces
- (D) All
of these
9. In oblique cutting system, the maximum chip thickness
- (A) Occurs
at the middle
- (B) May
not occur at the middle
- (C) Depends
upon the material of the tool
- (D) Depends
upon the geometry of the tool
10. The rear teeth of a broach
- (A) Perform
burnishing operation
- (B) Remove
minimum metal
- (C) Remove
maximum metal
- (D) Remove
no metal
11. The soft grade grinding wheels are denoted by the letters
- (A) A to H
- (B) I to P
- (C) Q to Z
- (D) A to P
12. The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)
- (A) πd
- (B) πdn
- (C) πdn
sinα
- (D) πdn
cosα
13. Small nose radius
- (A) Increases
tool life
- (B) Decreases
tool life
- (C) Produces
chipping and decreases tool life
- (D) Results
in excessive stress concentration and greater heat generation
14. Which of the following statement is correct about EDM machining?
- (A) It
can machine hardest materials
- (B) It
produces high degree of surface finish
- (C) The
tool and work are never in contact with each other
- (D) All of these
15. A tool used to withdraw a drill from the sleeve is called
- (A) Drill
remover
- (B) Drill puller
- (C) Drift
- (D) Drill
drawer
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