67,
70.
In abrasive jet machining, the nozzle mounted in the fixture is made up of
(A) High Speed Steel (B) Aluminium Oxide
(ಲ) Silicon Carbide (D) Tungsten Carbide
‘Which thread is used in lead screw of lathe ?
(A) Acme thread (B) Butters thread
(C) Square thread (D) Knuckle thread
‘Which type head stock have back gear mechanism 7
(ಯ) All geared head stock (B) Stepped cone pulley head stock
(¢) Allofthe above (D) None of the a....
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