21. The lip angle of a single point tool is usually
A. 20° to 40°
B. 40° to 60°
C. 60° to 80°
D. none of these
22. The average cutting speed for turning brass with a high speed steel tool is
A. 15 to 19 m/min
B. 25 to 31 m/min
C. 60 to 90 m/min
D. 90 to 120 m/min
23. The maximum production of small and slender parts is done by
A. watch maker’s lathe
B. sliding head stock automatic lathe
C. multispindle automatic lathe
D. capastan lathe
24. Side rake angle on tools is provided to control chip flow.
A. True
B. False
25. The method of grinding used to produce a straight or tapered surface on a workpiece, is
A. internal cylindrical grinding
B. form grinding
C. external cylindrical grinding
D. surface grinding
26. A fixture does not guide the tool.
A. Correct
B. Incorrect
27. Crater wear occurs mainly on the
A. nose part, front relief face and side relief face of the cutting tool
B. face of the cutting tool at a short distance from the cutting edge only
C. cutting edge only
D. front face only
28. Gear lapping is an operation
A. after heat treatment
B. prior to heat treatment
C. for gear reconditioning
D. none of these
29. The facing is an operation of
A. bevelling the extreme end of a workpiece
B. embossing a diamond shaped pattern on the surface of a workpiece
C. reducing the diameter of a workpiece over a very narrow surface
D. machining the ends of a workpiece to produce a flat surface square with the axis
30. A fixture 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
31. A drill considered as a cutting tool having zero rake, is known as a
A. flat drill
B. straight fluted drill
C. parallel shank twist drill
D. tapered shank twist drill
32. Which of the following statement is wrong about ultra-sonic 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.
33. In oblique cutting system, the maximum chip thickness occurs at the middle.
A. Correct
B. Incorrect
34. Larger end cutting edge angle __________ tool life.
A. increases
B. decreases
C. does not effect
35. The lead screw of a lathe has __________ threads.
A. single start
B. double start
C. multi-start
D. any one of these
36. A left 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
37. The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is
A. carbide, ceramic, cermet, borazon
B. ceramic, carbide, borazon, cermet
C. cermet, carbide, ceramic, borazon
D. borazon, ceramic, carbide, cermet
38. Which of the following statement is incorrect with reference of lathe cutting tools?
A. The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
B. The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
C. The heel is that part of the tool which is shaped to produce the cutting edges and face
D. The base is that surface of the shank which bears against the support and takes tangent pressure of the cut
39. In the relation VTn = C, the value of n for carbide tools is
A. 0.1 to 0.2
B. 0.20 to 0.25
C. 0.25 to 0.40
D. 0.40 to 0.55
40. In up milling, the thickness of chip is
A. minimum at the beginning of the cut and maximum at the end of the cut
B. maximum at the beginning of the cut and minimum at the end of the cut
C. uniform throughout the cut
D. none of these