1
GATE PI 2011
+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
A
$$0.2543$$
B
$$1.172$$
C
$$0.5086$$
D
$$0.800$$
2
GATE PI 2011
+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
A
$$33.366$$
B
$$30.397$$
C
$$29.366$$
D
$$26.397$$
3
GATE PI 2010
+2
-0.6
A small bore is designated as $$25H7.$$ The lower (minimum) and upper (maximum) limits of the bore are $$25.000mm$$ and $$25.021$$ respectively. When the bore is designated as $$25H8,$$ then the upper limit is $$25.033mm.$$ When the bore is designated as $$25H6,$$ then the upper limit of the bore in $$mm$$ is
A
$$25.001$$
B
$$25.005$$
C
$$25.009$$
D
$$25.013$$
4
GATE PI 2009
+2
-0.6
An autocollimator is used to
A
Measure small angular displacements on flat surfaces
B
Compare known and unknown dimensions
C
Measure the flatness error
D
Measure roundness error between centers
GATE PI Subjects
Fluid Mechanics
Metrology
Theory of Machines
Engineering Mathematics
Heat Transfer
Machine Tools and Machining
Industrial Engineering
Engineering Mechanics
Strength of Materials
Thermodynamics
Machine Design
Casting
Joining of Materials
Metal Forming
EXAM MAP
Joint Entrance Examination