46. A straight edge is inspected on a coordinate measuring machine. The readings obtained at intervals of 100 mm along the top edge are 100.1, 100.5 and 100.4 mm. The straightness error, making the end points as reference is...

1. 1. 0.25mm

   
   
   

   2. 0.39mm

   
   
   

   3. 0.19mm

   
   
   

   4. 0.35mm

   
   
   

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1. View Hint View Answer Discuss in Forum

   
   

   (y - 100.1) =	0.3	(x - 100)
   	200

   
   at x = 200 y = 100.25mm
   Error = y – 100.5 = 0.25mm

   Correct Option: A

   
   

   (y - 100.1) =	0.3	(x - 100)
   	200

   
   at x = 200 y = 100.25mm
   Error = y – 100.5 = 0.25mm

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47. The diameter of the best wire to measure the effective diameter of metric screw threads of 0.5 mm pitch is.... mm

1. 1. 0.28mm

   
   
   

   2. 0.38mm

   
   
   

   3. 0.25mm

   
   
   

   4. 0.29mm

   
   
   

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1. View Hint View Answer Discuss in Forum

   P = 0.5
   

   dw =	0.5	× Sec30°
   	2

   
   d_w = 0.28mm

   Correct Option: A

   P = 0.5
   

   dw =	0.5	× Sec30°
   	2

   
   d_w = 0.28mm

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48. The skid in a stylus type roughness measuring instrument is used to provide... A.... and define .... B.... geometrical profile of the surface.
    A. support/datum
    B. micro/macro

1. 1. Datum

   
   
   

   2. Macro

   
   
   

   3. Both A and B

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   A. Datum
   B. Macro

   Correct Option: C

   A. Datum
   B. Macro

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49. In mass manufacturing, two holes in a plate type of component are ideally located with the help of

1. 1. one solid pin in the larger hole and one diamond pin in the smaller hole

   
   
   

   2. two solid pin in either holes

   
   
   

   3. two diamond pins in either holes

   
   
   

   4. one solid pin in the smaller hole and one demand pin in the larger hole
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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50. Which of the following powder production methods produces spongy and porous particles?

1. 1. Atomization

   
   
   

   2. Reduction of metal oxides

   
   
   

   3. Electrolytic deposition

   
   
   

   4. Pulverization

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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