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 

 

MAM

 

Magnetic Abrasive Machining

 

Which of the following type of tools, are required for magnetic field assisted polishing?

a) Rigid tools             b) Expensive tools     c) Magnetic tools       d) Ultra precession tools

 View Answer

Answer: c

Explanation: Magnetic field assisted polishing requires only magnetic machining elements, for the purpose of machining.

 

 

Which of the following is not a magnetic field assisted machining process?

a) Electro-plating process    b) Magnetic abrasive finishing        c) Magnetic float polishing

d) All of the mentioned

 View Answer

Answer: a

Explanation: There are only two types of magnetic field assisted polishing: Magnetic abrasive machining and Magnetic float polishing.

 

 

In the advanced machining processes, what is the full form of MAF?

a) Magnet Automated Finishing     b) Magnetic Abrasive Finishing

c) Magnet Assisted Floating            d) Magnetic Association for Floating

 View Answer

Answer: b

Explanation: In advanced machining processes, full form of MAF is Magnetic Abrasive Finishing.

 

 

Magnetic Abrasive finishing is used for which of the following application/s?

a) Surface finishing              b) Cutting      c) Drilling      d) Boring

 View Answer

Answer: a

Explanation: Magnetic abrasive finishing is a process, which is opted for finishing of parts that are already machined on the other machines.

 

 

Which is the place, where Magnetic field assisted polishing was invented?

a) The United States of America                 b) The United Arab Emirates

c) Union of Soviet Socialist Republics        d) Japan

 View Answer

Answer: a

Explanation: Magnetic field assisted polishing was invented in the United States of America.

 

 

Which of the following processes cannot be machined using Magnetic abrasive finishing?

a) Surface finishing  b) Surface polishing c) Hole Drilling         d) None of the mentioned

 View Answer

Answer: c

Explanation: Holes drilling is one of the processes that cannot be done using Magnetic Abrasive Finishing.

 

Manufacturing may produce these types of products:

a)  Discrete or continuous     b) Raw material or parts     c) Machinery or manufactured

d)  Processes or operations

 View Answer

Answer: c

 

Approximately this much of the cost of product development and manufacture is determined at the design stage:

a)  40-50%      b) 60-75%      c) 70-80%      d) 75-85%

 View Answer

Answer: c

 

This allows the designer to conceptualize objects more easily without having to make costly illustrations, models, or prototypes:

a)  Computer-aided manufacturing                   

b)  Computer-aided design  

c) Computer-aided engineering                        

d) Computer-aided prototyping

View Answer

Answer: b                     

                              

This allows the performance of structures to be analyzed and tested efficiently, accurately, and quickly:

a)  Computer-aided manufacturing

b)  Computer-aided design  

c)   Computer-aided engineering

d)  Computer-aided prototyping

 View Answer

Answer: c

 

This type of rapid prototyping system uses a laser to fuse powdered metals, plastics, or ceramics:

a)  Fused deposition modeling                     

b)  Stereolithography apparatus     

c)   Solid ground curing

d)  Selective laser sintering

 View Answer

Answer: d

 

 After the explosion is over, how is the debris carried away?

a)     Evaporation         b) Fresh dielectric    c) Old dielectric        d) All of the mentioned

 View Answer

Answer: b

Explanation: Debris is carried away by the fresh dielectric that rushes in.

 

The layer formed when unexpelled molten metal solidifies is known as _____.

a)     Reabsorbed layer           

b)    Recast layer        

c)     Unevaporated layer       

d)    Condensed layer

 View Answer

Answer: b

Explanation: Unexpelled molten metal solidifies to form a layer known as recast layer.

 

 

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

 

R.Satheesh