21. The operation performed on a shaper is
A. machining horizontal surface
B. machining vertical surface
C. machining angular surface
D. all of these
22. 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
23. The thrust force will increase with the increase in
A. side cutting edge angle
B. tool nose radius
C. rake angle
D. end cutting edge angle
24. The broaching operation in which the work moves past the stationary tool is called
A. pull broaching
B. push broaching
C. surface broaching
D. continuous broaching
25. In transverse grinding
A. the work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
B. the work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
C. the work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
D. the work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
26. If the grain size is __________ the tool life is better.
A. smaller
B. larger
27. Flank wear is due to the abrasive action of hard mis-constituents including debris from built up edge as the work material rubs the work surface.
A. Correct
B. Incorrect
28. The operation of reproduction of an outline of a template on a workpiece is called face milling.
A. Yes
B. No
29. The usual value of the point angle of a drill is
A. 70°
B. 100°
C. 118°
D. 130°
30. Buffing wheels are made of
A. softer metals
B. cotton fabric
C. carbon
D. graphite
31. Jigs are heavier than fixtures in construction.
A. Yes
B.No
32. In electro-chemical machining, the gap between the tool and work is kept as
A. 0.1 mm
B. 0.25 mm
C. 0.4 mm
D. 0.75 mm
33. The process of improving the cutting action of the grinding wheel is called
A. truing
B. dressing
C. facing
D. clearing
34. The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is __________ cutting speed for drilling mild steel with high speed steel drills.
A. equal to
B. less than
C. more than
35. In electro-discharge machining, the tool is connected to cathode.
A. Correct
B. Incorrect
36. Broaching is applied for machining
A. internal and external surfaces
B. round or irregular shaped holes
C. external flat and contoured surfaces
D. all of these
37. Half nut is used to lock the lathe carriage to the lead screw for thread cutting.
A. True
B. False
38. The advantage of a broaching operation is that
A. rate of production is very high
B. high accuracy and high class of surface finish is possible
C. roughing and finishing cuts are completed in one pass of the tool
D. all of the above
39. The tool life __________ as the cutting speed increases.
A. decreases
B. increases
40. The infeed grinding is used to
A. produce tapers
B. grind shoulders and formed surfaces
C. grind long, slender shafts or bars
D. ail of these