GATE ME topic:metrology-and-inspection PYQs & Answers — Page 2

Questions 11–20 of 20. Imported answers require independent review unless marked reviewed.

A 76.2 mm gauge block is used under one end of a 254 mm sine bar with roll diameter of 25.4 mm. The height of gauge blocks required under the other end of the sine bar to measure an angle of 30° is __________ mm (round off to two decimal places).

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The figure below shows a symbolic representation of the surface texture in a perpendicular lay orientation with indicative values (I through VI) marking the various specifications whose definitions are listed below.

Diagram for Mechanical Engineering question 12

P: Maximum Waviness Height (mm); Q: Maximum Roughness Height (mm); R: Minimum Roughness Height (mm); S: Maximum Waviness Width (mm); T: Maximum Roughness Width (mm); U: Roughness Width Cutoff (mm).

The correct match between the specifications and the symbols (I to VI) is

Your answerChoose one option.

I-R, II-Q, III-P, IV-S, V-U, VI-T

I-R, II-P, III-U, IV-S, V-T, VI-Q

I-U, II-S, III-Q, IV-T, V-R, VI-P

I-Q, II-U, III-R, IV-T, V-S, VI-P

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Two rollers of diameters

(in mm) and

(in mm) are used to measure the internal taper angle in the V-groove of a machined component. The heights

(in mm) and

(in mm) are measured by using a height gauge after inserting the rollers into the same V-groove as shown in the figure.

Diagram for Mechanical Engineering question 32

Which one of the following is the correct relationship to evaluate the angle

as shown in the figure?

Your answerChoose one option.

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The following data applies to basic shaft system: tolerance for hole = 0.002 mm, tolerance for shaft = 0.01 mm, allowance = 0.003 mm, basic size = 50 mm. The maximum hole size is _____ nm (round off to 3 decimal places).

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The most common limit gage used for inspecting the hole diameter is

Your answerChoose one option.

Snap gage

Ring gage

Plug gage

Master gage

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A circular shaft having diameter

mm is manufactured by turning process. A 50 μm thick coating of TiN is deposited on the shaft. Allowed variation in TiN film thickness is ± 5 μm. The minimum hole diameter (in mm) to just provide clearance fit is

Your answerChoose one option.

65.01

65.12

64.95

65.10

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The height (in mm) for a 125 mm sine bar to measure a taper of 27° 32′ on a flat work piece is ______ (correct to three decimal places).

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The standard deviation of linear dimensions P and Q are 3 μm and 4 μm, respectively. When assembled, the standard deviation (in μm) of the resulting linear dimension (P+Q) is____________

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Assume that the surface roughness profile is triangular as shown schematically in the figure. If the peak to valley height is 20 μm, the central line average surface roughness

(in μm) is

Diagram for Mechanical Engineering question 50

Your answerChoose one option.

6.67

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A cylindrical pin of

mm diameter is electroplated. Plating thickness is

mm. Neglecting the gauge tolerance, the diameter (in mm, up to 3 decimal points accuracy) of the GO ring gauge to inspect the plated pin is ____________

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GATE ME topic:metrology-and-inspection PYQs

Question 42

Question 12

Question 32

Question 43

Question 17

Question 36

Question 25

Question 24

Question 50

Question 53