TURNER FITTER MACHINIST IMPORTANT MCQ FOR CBT
1. Segmental chips are formed during machining
A. mild steel
B. cast iron
C. high speed steel
D. high carbon steel
2. Cemented carbide tool tips are produced by powder metallurgy.
A. True
B. False
3. If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is
A. conical locator
B. cylindrical locator
C. diamond pin locator
D. vee locator
4. Side rake angle of a single point cutting tool is the angle
A. by which the face of the tool is inclined towards back
B. by which the face of the tool is inclined sideways
C. between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool
D. between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
5. Internal gears can be made by
A. hobbing
B. shaping with pinion cutter
C. shaping with rack cutter
D. milling
6. In order to prevent tool from rubbing the work __________ on tools are provided.
A. rake angles
B. relief angles
7. The silicon carbide abrasive is chiefly used for grinding
A. cemented carbide
B. ceramic
C. cast iron
D. all of these
8. Drilling is an example of
A. orthogonal cutting
B. oblique cutting
C. simple cutting
D. uniform cutting
9. A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed.
A. Yes
B.No
10. When the cutting edge of the tool is dull, then during machining
A. continuous chips are formed
B. discontinuous chips are formed
C. continuous chips with built-up edge are formed
D. no chips are formed
11. A fine grained grinding wheel is used to grind hard materials.
A. Correct
B. Incorrect
12. Cast iron during machining produces
A. continuous chips
B. discontinuous chips
C. continuous chips with built-up-edge
D. none of these
13. A single point thread cutting tool should ideally have
A. zero rake angle
B. positive rake angle
C. negative rake angle
D. point angle
14. The work or surface speed for cylindrical grinding varies from
A. 5 to 10 m/min
B. 10 to 20 m/min
C. 20 to 30 m/min
D. 40 to 60 m/min
15. The cutting tool in a milling machine is mounted on
A. spindle
B. arbor
C. column
D. knee
16. The tool made of cemented carbide wear out faster at
A. slow speeds
B. medium speeds
C. fast speeds
D. very fast speeds
17. A push broach as compared to pull broach
A. has less number of teeth
B. is short and stocky
C. removes less material for each pass of the tool
D. all of the above
18. Twist drills are made of
A. high speed steel
B. carbon steel
C. stainless steel
D. either (a) or (b)
19. A twist drill is a
A. side cutting tool
B. front cutting tool
C. end cutting tool
D. none of these
20. The rake angle required to machine brass by high speed steel tool is
A. 0°
B. 10°
C. 20°
D. -10°