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Engineering :: Production Engineering

451.  Which of the following process needs high voltage for its operation?
A. Ultrasonic machining B. Abrasive jet machining
C. Electron beam machining D. Electro chemical machining
E. Plasma arc machining    
452.  The surface finish obtainable in ultrasonic machining is of the order of
A. 0.2 to 0.5 B. 2 to 5
C. 20 to 50 D. 200 to 500
E. 500 to 1000    
453.  The surface finish obtainable in abrasive jet machining is of the order of
A. 0.5 to 1.2 B. 2 to 5
C. 12 to 20 D. 20 to 50
E. 50 to 100    
454.  Which of the following process has least power consumption in kW/cm2/min?
A. Plasma arc machining B. Laser beam machining
C. Ultrasonic machining D. Electro discharge machining
E. Abrasive jet machine    
455.  Which of the following process has highest power consumption in kW/cm2/min?
A. Ultrasonic machining B. Plasma arc machining
C. Electron beam machining D. Electro chemical machining
E. Abrasive jet machining    
456.  Which of the following process needs high current for its operation?
A. Ultrasonic machining B. Abrasive machining
C. Electro chemical machining D. Electric discharge machining
E. Electron beam machining    
457.  In abrasive jet machining the achievable tolerances are nearly
A. 0.1 B. 1
C. 50 D. 250
E. 500    
458.  In plasma arc machining the achievable tolerances are nearly
A. 0.01 B. 0.1
C. 1 D. 25
E. 250    
459.  Which of the following non-traditional machining process will have inferior surface finish as compared to the remaining processes?
A. Ultrasonic machining B. Plasma arc machining
C. Electro discharge machining D. Electron beam machining
E. Chemical machining    
460.  The power consumption in ultrasonic machining in kW/m2/min is of the order of
A. 1 kW/m3/min B. 10 kW/m3/min
C. 100 kW/m3/min D. 200 kW/m3/min
E. 1000 kW/m3/min    

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