TURNER FITTER MACHINIST IMPORTANT MCQ FOR CBT

1. The angle between the face and flank of the single point cutting tool is known as
A. rake angle
B. clearance angle
C. lip angle
D. point angle

2. 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

3. Which of the following statement is correct as regard to up milling?
A. It cannot 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.

4. In determining the various forces on the chip, Merchant assumed that the
A. cutting edge of the tool is sharp and it does not make any flank contact with the workpiece
B. only continuous chip without built-up-edge is produced
C. cutting velocity remains constant
D. all of the above

5. Stellite preserve hardness upto a temperature of
A. 350°C
B. 500°C
C. 900°C
D. 1100°C

6. Hard and tough materials like cast iron should be turned at
A. slow speed
B. high speed
C. any speed
D. certain specific speed

7. In oblique cutting system, the cutting edge of the tool
A. may clear the width of the workpiece
B. may or may not clear the width of the workpiece
C. may not clear the width of the workpiece
D. should always clear the width of the workpiece

8. When the shear angle is small
A. path of shear is short and chip is thin
B. path of shear is large and chip is thick
C. path of shear is short and chip is thick
D. path of shear is large and chip is thin

9. A fine grained grinding wheel is used to grind
A. hard and brittle materials
B. soft and ductile materials
C. hard and ductile materials
D. soft and brittle materials

10. EDM machining is applied for
A. shaping carbide dies and punches having complicated profiles
B. making large number of small holes in sieves and fuel nozzles
C. embossing and engraving on harder materials
D. all of these

11. In gear hobbing
A. only hob rotates
B. only gear blank rotates
C. both hob and gear blank rotates
D. neither hob nor gear blank rotates

12. Holes are machined by push broaches only for sizing.
A. Correct
B. Incorrect

13. The increase in depth of cut and feed rate __________ surface finish.
A. improves
B. deteriorates
C. does not effect

14. A lathe with four steps on the cone pulley and with backgears will have
A. four direct speeds
B. four indirect speeds
C. four direct and four indirect speeds
D. eight indirect speeds

15. The parameter which completely defines the chip formation in a metal cutting process is
A. shear angle
B. chip-tool contact length
C. both (a) and (b)
D. none of these

16. In machining cast iron, no cutting fluid is required.
A. Correct
B. Incorrect

17. 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

18. 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

19. 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

20. The drill spindles are provided with standard taper known as
A. Morse taper
B. Seller’s taper
C. Chapman taper
D. Brown and Sharpe taper