EBM

 

ELECTRON BEAM MACHINING

 

Which of the following are the applications of EBM process?

a)     Drilling             

b)     Cutting         

c)     Engraving            

d)     All of the mentioned

Answer: d

Explanation: Drilling small holes, cutting, engraving, and heat treatment are some of modern applications of Electron beam machining.

 

Which of the following are the applications of EBM?

a)     Hole drilling            

b)     Slotting      

c)     Perforation of thin sheets              

d)     All of the mentioned

Answer: d

Explanation: Drilling, perforation of thin sheets, slotting and integrated circuit fabrication are some of the applications of Electron beam machining.

 

What is the value of largest diameter of the hole drilled on EBM?

a) 0.5 mm      

b) 1.0 mm      

c) 1.5 mm       

d) 2.0 mm

Answer: c

Explanation: The maximum value of diameter that can be drilled using Electron beam machining is about 1.5 mm.

 

What is the value of maximum depth of the hole drilled on EBM?

a) 10 mm       

b) 20 mm       

c) 30 mm        

d) 40 mm

Answer: c

Explanation: Value of the maximum depth that can be drilled using Electron beam machining is about 10 mm.

 

What is the range of depth-to-diameter ratio in Electron beam machining?

a) 2:5 to 2:11             

b) 1:1 to 1:15             

c) 3:4 to 3:20             

d) 4:5 to 4:19

Answer: b

Explanation: The depth to diameter ratio in Electron beam machining will vary between 1:1 and 1:15.

 

The tungsten filament cathode is heated to what temperatures in EBM?

a)     1000 to 1500 ᵒC

b)     1500 to 2000 ᵒC   

c)     2500 to 3000 ᵒC   

d)     3500 to 5000 ᵒC

Answer: c

Explanation: The tungsten filament cathode is heated to 2500 to 3000 ᵒC in Electron beam machining.

 

What are the values of currents used in EBM process?

a)     1 and 20 mA            

b)     20 and 100 mA         

c)     100 and 200 mA         

d)     200 and 400 mA

Answer: b

Explanation: The values of the currents used in the Electron beam machining process are between 20 and 100 mA.

 

What are the values of current densities used in the process of EBM?

a)     5 and 15 A/cm²       

b)     15 and 20 A/cm² 

c)     20 and 30 A/cm² 

d)     40 and 60 A/cm²

Answer: a

Explanation: The values of the current densities used in EBM lie between 5 and 15 A/cm2.

 

Emission current depends up on which of the following factors?

a)     Cathode material

b)     Temperature       

c)     Voltage supply    

d)     All of the mentioned

Answer: d

Explanation: Emission current depends on the cathode material, temperature, and the high voltage in the process of Electron beam machining.

 

What are the values of voltages used in the EBM process?

a)     10 V                      

b)     50 V

c)     150 V        

d)     200 V

Answer: c

Explanation: The values of voltages used in the process of electron beam machining is about 150 V.

 

 

Ref: https://www.sanfoundry.com/advanced-machining-questions-answers-edm-applications-1/

 

R.Satheesh