AMP UNIT 3&4

Laser beam machining process does not requires vacuum

• Yes

• No

• Sometimes

Nd:YAG is

• Neodymium : Yttrium-Aluminum-Garnet

• Neon : Yttrium-Aluminum-Garnet

• Neodymium : Yttrium-Arsenic -Garnet

• Neodymium : Yttrium-Aluminum-Gold

Which of the following is not a physical parameter in Laser beam machining process?

• Reflectivity of the workpiece surface

• Thermal conductivity of the workpiece

• Specific heats and latent heats of melting and evaporation

• Density of the workpiece

Polished surfaces are preferable for Laser beam welding.

• Yes

• No

Electron beam machining requires vacuum

• Yes

• No

Choose the correct sequence with respect to Material removal rate

• PAM>LBM>EBM

• LBM>EBM>PAM

• EBM>LBM>PAM

• EBM>PAM>LBM

Electrochemical machining is the reverse of

• Electroless plating

• Electroplating

• Electropainting

STEM is

• Short-Tool electrolytic machining

• Shaped-Tool electrolytic machining

• Shaped-Tube electrolytic machining

• Short-Tube electrolytic machining

In mechanical machining, material is removed by

• Erosion

• Vaporization

• Abrasion

• Corrosion

Material in thermal machining is removed by which of the following means?

• Vaporization

• Melting

• Electro-plating

• All of the mentioned