771. The tool made of cemented carbide wear out faster at
A. slow speeds
B. medium speeds
C. fast speeds
D. very fast speeds

772. 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

773. Twist drills are made of
A. high speed steel
B. carbon steel
C. stainless steel
D. either (a) or (b)

774. A twist drill is a
A. side cutting tool
B. front cutting tool
C. end cutting tool
D. none of these

775. The rake angle required to machine brass by high speed steel tool is
A. 0°
B. 10°
C. 20°
D. -10°

776. 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

777. 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

778. 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

779. 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

780. 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

NOTE
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PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
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