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Which types of lasers are used in Laser beam machining?

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in Advanced Machining by (962k points)
Which types of lasers are used in Laser beam machining?

(a) Continuous wave

(b) Pulsed mode

(c) Continuous wave & Pulsed mode

(d) None of the mentioned

The question was asked during a job interview.

My enquiry is from Laser Beam Machining-Introduction in portion Thermal Processes of Advanced Machining

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The correct answer is (c) Continuous wave & Pulsed mode

To explain: Laser may be in continuous wave (CW) or in Pulsed mode (PM) for machining in LBM.

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