Production Technology MCQ - Set 07

Practice Test: Question Set - 07

1. A twist drill is a
    (A) Side cutting tool
    (B) Front cutting tool
    (C) End cutting tool
    (D) None of these

2. A jig is defined as a device which
    (A) Holds and locates a workpiece and guides and controls one or more cutting tools
    (B) Holds and locates a workpiece during an inspection or for a manufacturing operation
    (C) Is used to check the accuracy of workpiece
    (D) All of the above

3. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
    (A) 0.2 mm
    (B) 10 mm
    (C) 20 mm
    (D) 100 mm

4. Chemical milling operation is performed
    (A) On universal milling machine
    (B) On plain milling machine
    (C) In a tank containing an etching solution
    (D) Any one of these

5. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
    (A) 50°C
    (B) 100°C
    (C) 175°C
    (D) 275°C

6. Which of the following statement is wrong about ultrasonic machining?
    (A) It is best suited for machining hard and brittle materials.
    (B) It cuts materials at very slow speeds
    (C) It removes large amount of material
    (D) It produces good surface finish

7. The ductile materials, during machining, produce
    (A) Continuous chips
    (B) Discontinuous chips
    (C) Continuous chips with built up edge
    (D) Either (A) or (C)

8. Which of the following parameters govern the value of shear angle in continuous chip formation?
    (A) True feed
    (B) Chip thickness
    (C) Rake angle of the cutting tool
    (D) All of these

9. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
    (A) Mild steel
    (B) Copper
    (C) Aluminium
    (D) Brass

10. A right hand tool on a lathe cuts most efficiently when it travels
    (A) From left to right end of the lathe bed
    (B) From right to left end of the lathe bed
    (C) With the help of a compound slide
    (D) Across the bed

11. Cast iron during machining produces
    (A) Continuous chips
    (B) Discontinuous chips
    (C) Continuous chips with built-up edge
    (D) None of these

12. Dielectric is used in
    (A) Electrochemical machining
    (B) Ultrasonic machining
    (C) Electro discharge machining
    (D) Laser machining

13. In electro-discharge machining, dielectric is used to
    (A) Help in the movement of the sparks
    (B) Control the spark discharges
    (C) Act as coolant
    (D) All of these

14. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
    (A) Doubled
    (B) Halved
    (C) Quadrupled
    (D) Unchanged

15. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
    (A) Friction zone
    (B) Work-tool contact zone
    (C) Shear zone
    (D) None of these

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