Abrasive Jet Machining Process

AWJM can be used to cut

• Metals

• Non-metals

• Both a and b

• None of the above

For longer life of nozzle in AWJM, what type of material is used

• Tungsten carbide

• Sapphire

• Boron carbide

• Stainless steel

In abrasive water jet machining, the abrasive particles are added to the water stream

• After it exits the nozzle

• Before it enters the pumping unit

• Just before it enters the nozzle

• While it is in the nozzle

The material removal mechanism in AWJM is

• Melting and vaporisation

• Erosion or localised stress fields

• Ion displacement

• Spark erosion

With an increase in abrasive particle size in AJM

• MRR as well as surface finish increase

• MRR decreases but surface finish increases

• MRR increases but surface finish decreases.

In Abrasive jet machining, what may be the size of the abrasive grains used?

• 10 – 40 µm

• 50 – 100 µm

• 100 – 150 µm

• 200 – 300 µm

In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

• increases continuously.

• decreases continuously.

• decreases, becomes stable and then increases.

• increases, becomes stable and then decreases

AJM nozzles are made of

• low carbon steel

• HSS

• WC

• Stainless steel

What are the processes where Abrasive jet machining can be used?

• Cutting

• Cleaning

• Deburring

• All of the mentioned

Material removal takes place in AJM due to

• electrochemical action

• mechanical impact

• fatigue failure of the material

• sparking on impact