Which of the following is true about electron beam machining (EBM)?

1.	Which of the following is true about electron beam machining (EBM)?
A.	By EBM process, tapered holes can be generated
B.	Electro-magnetic coils are used to change the direction of the electron beam
C.	Electron beam gun works under high pressure
D.	Increasing the current density increases the spot size
Answer» B. Electro-magnetic coils are used to change the direction of the electron beam

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Which of the following is true about electron beam machining (EBM)?

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