GATE PI
Metrology
Metrology and Inspection
Previous Years Questions

## Marks 1

Accuracy of a measuring instrument is expressed as
A machined surface with standard symbols indicating the surface texture is shown in the Figure. (ALL dimensions in the Figure are in micrometer). T...
The limits of a shaft designated as $$100h5$$ are $$100.000$$ $$mm$$ and $$100.014$$ $$mm.$$ Similarly, the limits of a shaft designated as $$100h8$$ ...
The roughness profile of a surface is depicted below. The surface roughness parameter $${R_a}\,\,$$ (in $$\mu m$$) is ________________....
In an interchangeable assembly, shafts of size $${25.000^{\matrix{ { + 0.040} \cr { - 0.010} \cr } }}\,\,mm$$ mate with holes of size {2... The geometric tolerance that does not need a datum for its specification is Which one of the Instrument is a comparator Ring gage is used to measure Abbe's principle of alignment is followed in: Abbe's principle of alignment is used in measurements made in ................. The combination of slip gauges to obtain a dimension of10.35mm$$will be In mass manufacturing, two holes in a plate type of component are ideally located with the help of The fit on a hole-shaft pair system is specified as$$H7$$-$$s6$$. The type of fit is The diameter of the best wire to measure the effective diameter of a metric screw threads of$$0.5mm$$pitch is .........$$mm$$The most widely used reinforcement in modern day$$FRP$$tennis racket is In an interference microscope, a groove produces a band distortion of$$4$$band spacing. If the wave length of the monochromatic light source is$$0...
A straight edge is inspected on a coordinate measuring machine. The readings obtained at intervals of $$100mm$$ along the top edge are $$100.01, 100.0... A shaft of diameter$${20^{\matrix{ { + 0.05} \cr { - 0.15} \cr } }}$$and a hole of diameter$${20^{\matrix{ { + 0.20} \cr { + 0....
The skid in a stylus type roughness measuring instrument is used to provide ............ A .............. and define ................... B ..............
Powder metallurgical components have
Outside micrometer is calibrated with the help of
For angle measurement in metrology, the following pair can be used in conjunction with each other
Abbe's principle of alignment states that the scale axis must coincide with the line of
Flatness of slip gages is checked with

## Marks 2

During the measurement of internal taper of a part using standard balls of diameter $$15$$ $$mm$$ and $$20$$ $$mm$$, the large ball is found to protru...
A surface is prepared specially for an application with the profile as shown in the figure. The theoretical $${R_a}$$ value for this surface, in \... The alignment test ''Spindle square with base plate'' is applied to the radial drilling machine. A dial indicator is fixed to the cylindrical spindle ... Cylindrical pins of{25^{\matrix{ { + 0.020} \cr { + 0.010} \cr } }}\,\,mm$$diameter are electroplated in a shop. Thickness of the pla... A Sine bar has a length of$$250mm.$$Each roller has a diameter of$$20mm.$$During taper angle measurement of a component, the height from the surfa... To measure the effective diameter of an external metric thread (included angle is$$60$$degrees) of$$3.5mm$$pitch, a cylindrical standard of ... Observation of a slip gauge on a flatness interferometer produced fringe counts numbering$$10$$and$$14$$for two readings. The second reading is ta... A small bore is designated as$$25H7.$$The lower (minimum) and upper (maximum) limits of the bore are$$25.000mm$$and$$25.021$$respectively. When ... An autocollimator is used to Match the following ... The following data are given for calculating limits of dimensions and tolerances for a hole: Tolerance unit$$'i'$$(microns)$$=0.45{\left( D \r...
An experimental setup is planned to determine the taper of work piece as shown in the figure. If the two precision rollers have radii $$8mm$$ and $$5m... A tool with side cutting edge angle of$$30$$degrees and end cutting edge angle$$10deg$$is used for fine turning with a feed of$$1mm/rev$$. Neglec... Tolerance on the dimension$$'x'$$in the two component assembly shown below is (all dimensions are in$$mm$$) ... A keyway of$$5mm$$depth is to be milled in a shaft of diameter$$60 \pm 0.1\,\,$$by positioning the shaft in a$$V$$-block of angle$$120deg$$... The surface finish of the component produced by a grinding process was measured. Based on roughness parameters obtained, which one of the following is... A cylindrical pin of diameter$${1.996^{\matrix{ { + 0.0015} \cr { - 0.0015} \cr } }}\,\,mm$$is assembled into a hole of diameter$${2.00...
In an interchangeable assembly, a shaft of $${20.00^{\matrix{ { - 0.015} \cr { - 0.005} \cr } }}\,\,mm$$ diameter and a hole of $${20.00^... The diameter of a hole is given as$${50^{\matrix{ { + 0.15} \cr { + 0.00} \cr } }}\,\,mm.$$The upper limit on the dimension in$$mm,$$... The least count of a$$200mm$$long spirit level is given as$$10$$seconds per division. The gradient of the spirit level expressed as$$mm$$ov... A hole is specified as$$\phi 30 \pm 0.04mm$$with$$\phi \,\,0.01\,\,M.$$The virtual diameter of the hole (i.e the maximum diameter of the pin that ... The maximum interference in$$mm$$after assembly between a bush of size$${30^{\matrix{ { + 0.06} \cr { + 0.03} \cr } }}$$and a shaft of... Holes$$1,2,3,4$$drilled in sequence , with angular positions and tolerances are shown in Figure. Evaluate closing angle$$'X'$$with its tolerance ...$$A30mm$$hole shaft assembly results in minimum and maximum clearances of$$0.03mm$$and$$0.30mm$$respectively. The hole has a ... To obtain dimension of$$61.18mm$$using slip gages, the most appropriate combination is The combination of slip gauges to obtain a dimension of$$10.35mm$$will be Assertion (A): Basic hole system is advocated by Indian Standards for fit design Explanation (E): Holes can be produced to any size.... Outside diameter of bush is turned using a mandrel. The mandrel diameter is maintained as$${30^{\matrix{ { + 0.000} \cr { - 0.050} \cr } ...
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Joint Entrance Examination