646. Checking the diameter of a hole using GO and NOGO gauges in an example of inspection by

1. 1. Variable and attributes

   
   
   

   2. attributes

   
   
   

   3. Variable

   
   
   

   4. None of these

   
   
   

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   Attributes.

   Correct Option: B

   Attributes.

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647. A shaft of diameter 20^+0.06_-0.15 mm and a hole of diameter 20^+0.20_+0.10 mm when assembled would yield
     

1. 1. Transition fit
      

   
   
   

   2. Interference fit
      

   
   
   

   3. Clearance fit
      

   
   
   

   4. None of these

   
   
   

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   Correct Option: C

   

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648. Two shafts A and B have their diameters specified as 100 ± 0.1 mm and 0.1 ± 0.0001 mm respectively. Which of the following statements is/are true
     

1. 1. Tolerance in the dimension is greater in shaft A
      

   
   
   

   2. The relative error in the dimension is greater in shaft A
      

   
   
   

   3. Tolerance in the dimension is greater in shaft B
      

   
   
   

   4. The relative error in the dimension is same for shaft A and shaft B

   
   
   

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   Tolerance of shaft A = 100.1 – 99.9 = 0.2
   Tolerance of shaft B = 0.1001 – 0.0999 = 0.002m
   Tol_A > Tol_B

   Correct Option: A

   Tolerance of shaft A = 100.1 – 99.9 = 0.2
   Tolerance of shaft B = 0.1001 – 0.0999 = 0.002m
   Tol_A > Tol_B

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649. A bush was turned after mounting the same on a mandrel. The mandrel diameter in millimeters is 40^+0.00_-0.05 and bore diameter of bush is 40^+0.06_-0.010. The maximum eccentricity of the bush in mm will be
     

1. 1. 0.01
      

   
   
   

   2. 0.055
      

   
   
   

   3. 0.1
      

   
   
   

   4. 0.11

   
   
   

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   Eecentricity in terms of Radius always =	0.11	= 0.055 mm
   	2

   Correct Option: B

   
   

   Eecentricity in terms of Radius always =	0.11	= 0.055 mm
   	2

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650. In an engineering drawing one finds the designation of 20G7f8, the position of tolerance of the hole is indicated by

1. 1. Letter G
      

   
   
   

   2. Letter f
      

   
   
   

   3. Number 7
      

   
   
   

   4. Number 8

   
   
   

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   Capital letter for Hole → G
   Small letter for shaft → f
   7 for → IT7
   8 for → IT8
   IT → Tolerance zone width

   Correct Option: A

   Capital letter for Hole → G
   Small letter for shaft → f
   7 for → IT7
   8 for → IT8
   IT → Tolerance zone width

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