446. Match the most suitable manufacturing processes for the following parts,
     Parts
     P. Computer chip
     Q. Metal forming dies and moulds
     R. Turbine blade
     S. Glass
     Manufacturing Processes
     1. Electrochemical Machining
     2. Ultrasonic Machining
     3. Electrodischarge Machining
     4. Photochemical Machining

1. 1. P-4, Q-3, R-1, S-2

   
   
   

   2. P-4, Q-3, R-2, S-1

   
   
   

   3. P-3, Q-1 R-4, S-2

   
   
   

   4. P-1, Q-2, R~4, S-3

   
   
   

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1. View Hint View Answer Discuss in Forum

   P–4, Q–3, R–1, S–2

   Correct Option: A

   P–4, Q–3, R–1, S–2

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447. Arrange the processes in the increasing order of their maximum material removal rate. Electrochemical Machining (ECM) Ultrasonic Machining (USM) Electron Beam Machining (EBM) Laser Beam Machining (LBM) Electric Discharge Machining (EDM)

1. 1. USM, LBM, EBM, EDM, ECM

   
   
   

   2. EBM, LBM, USM, ECM, EDM

   
   
   

   3. LBM, EBM, USM, ECM, EDM

   
   
   

   4. LBM, EBM, USM, EDM, ECM

   
   
   

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1. View Hint View Answer Discuss in Forum

   		MRR
   EDM	-	5 × 103 mm3/min
   LBM	-	5 mm3/min
   EBM	-	10 mm3/min
   USM	-	180 mm3/min
   ECM	-	10 × 103 mm3/min

   Correct Option: D

   		MRR
   EDM	-	5 × 103 mm3/min
   LBM	-	5 mm3/min
   EBM	-	10 mm3/min
   USM	-	180 mm3/min
   ECM	-	10 × 103 mm3/min

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448. A zigzag cavity in a block of high strength alloy is to be finish machined. This can be carried out by using
     

1. 1. electric discharge machining

   
   
   

   2. electro-chemical machining

   
   
   

   3. laser beam machining

   
   
   

   4. abrasive flow machining

   
   
   

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1. View Hint View Answer Discuss in Forum

   For making complex shape for higher strength alloy, electro-chemical machining is used because in it no mechanical force is exerted as well as tool left its impression over machined surfaced.

   Correct Option: A

   For making complex shape for higher strength alloy, electro-chemical machining is used because in it no mechanical force is exerted as well as tool left its impression over machined surfaced.

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449. Typical machining operations are to be performed on hard-to-machine materials by using the processes listed below. Choose the best set of Operation- Process combinations
     Operation
     P. Deburring (internal surface)
     Q. Die sinking
     R. Fine hole drilling in thin sheets
     S. Tool sharpening
     Process
     1. Plasma Arc Machining
     2. Abrasive Flow Machining
     3. Electric Discharge Machining
     4. Ultrasonic Machining
     5. Laser beam Machining
     6. Electrochemical Grinding

1. 1. P-1, Q-5, R-3, S-4

   
   
   

   2. P-1, Q-4, R-1, 5-2

   
   
   

   3. P-5, Q-1, R-2, S-6

   
   
   

   4. P-2, Q-3, R-5, S-6

   
   
   

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1. View Hint View Answer Discuss in Forum

   P–2, Q–3, R–5, 5–6

   Correct Option: D

   P–2, Q–3, R–5, 5–6

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450. The mechanism of material removal in EDM process is

1. 1. melting and evaporation

   
   
   

   2. melting and corrosion

   
   
   

   3. erosion and cavitation

   
   
   

   4. cavitation and evaporation

   
   
   

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1. View Hint View Answer Discuss in Forum

   Melting and evaporation.

   Correct Option: A

   Melting and evaporation.

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