1

GATE PI 2011

MCQ (Single Correct Answer)

+2

-0.6

Observation of a slip gauge on a flatness interferometer produced fringe counts numbering $$10$$ and $$14$$ for two readings. The second reading is taken by rotating the setup by $${180^ \circ }$$ Assume that both faces of the slip gauge are flat and the wavelength of the radiation is $$0.5086$$ $$\mu m.$$ The parallelism error (in $$\mu m.$$) between the two faces of the slip gauge is

2

GATE PI 2011

MCQ (Single Correct Answer)

+2

-0.6

To measure the effective diameter of an external metric thread (included angle is $$60$$ degrees) of $$3.5$$ $$mm$$ pitch, a cylindrical standard of $$30.5$$ $$mm$$ diameter and two wires of $$2$$ $$mm$$ diameter each are used. The micrometer reading over the standard and over the wires are $$16.532$$ $$mm$$ and $$15.398$$ $$mm$$ respectively. The effective diameter (in $$mm$$) of the thread is

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Total Questions

Casting

3

Engineering Mathematics

7

Fluid Mechanics

1

Heat Transfer

1

Joining of Materials

2

Machine Tools and Machining

6

Metal Forming

3

Metrology

2

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