781. Gear lapping is an operation
A. after heat treatment
B. prior to heat treatment
C. for gear reconditioning
D. none of these

782. 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

783. 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

784. 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

785. 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.

786. In oblique cutting system, the maximum chip thickness occurs at the middle.
A. Correct
B. Incorrect

787. rger end cutting edge angle __________ tool life.
A. increases
B. decreases
C. does not effect

788. The lead screw of a lathe has __________ threads.
A. single start
B. double start
C. multi-start
D. any one of these

789. 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

790. 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

NOTE
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