64.

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71.

Which of the following is the advantage of conventional lathe over CNC turning centre?
(A) Less machining time and less production rate
൯) Less production cost and less rejection rate
(C) Less maintenance and less investment cost
(D)_ All of these

In case of CNC turning centre, which statement is false to achieve higher metal removal rate:
(A) Using proper cutting tools (B) Using higher spindle power
(C) Using higher feed power (D) Using higher spindle speed

Which one of the following is not an advantage of ball screw in CNC machines?
(A) Ball screws have no longer life
(B) Higher accuracy can be maintained
(C) Has more frictional resistance, hence used for carrying heavier loads at faster rate

(D) Low power requirement for driving

The condition for deciding zero offset is :
(^) The cutter must be fixed into the machine spindle
(B) Work must be clamped on the machine table
(C) Date must be entered into the machine
(D) Feed, Speed etc. must be decided

Name the point with in the work piece chosen for the purpose of defining the position to be
reached by the tool :

(A) Program Zero (B) Work offset
(C) Machine Zero (D) Tool offset
Where the tool reference point lies in CNC machine?
(ಯ) At the end of the tool (B) At the cutting edge of the tool
(C) Spindle nose (D) Centre point of the tool turret

Electrical contacts, one each ate fixed on the CNC machine frame for each one of the slides.
State the name given to these contacts :

(A) Home position (B) Work offset
(C) Zero offset (D) Reference point

What is the purpose of edge finder during setting of the job?
(A) Measure Zero offset (B) Work Zero offset
(C) Tool Zero offset (D) None of the above

11 014/2024
[P.T.0.]