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Limits, Fits and Tolerances

The documents contain questions and explanations about tolerances, fits, and clearances in interchangeable assemblies from past GATE exams. They discuss concepts such as minimum clearance being the minimum hole diameter minus the maximum shaft diameter, and matching hole types, tolerances, shaft types, and fits based on dimensional information provided. The maximum interference in one assembly given shaft and hole tolerances is 20 microns.

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3K views4 pages

Limits, Fits and Tolerances

The documents contain questions and explanations about tolerances, fits, and clearances in interchangeable assemblies from past GATE exams. They discuss concepts such as minimum clearance being the minimum hole diameter minus the maximum shaft diameter, and matching hole types, tolerances, shaft types, and fits based on dimensional information provided. The maximum interference in one assembly given shaft and hole tolerances is 20 microns.

Uploaded by

simalaravi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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GATE - 2015 01

Question No.32

Holes of diameter 25. 0


+0.040
+0.020
mm are assembled interchangeably with the pins of diameter
25. 0
+0.005
0.008
mm . The minimum clearance in the assembly will be

(A) 0.048 mm (B) 0.015 mm (C) 0.005 mm (D) 0.008 mm

Show Answer

(B) 0.015 mm
Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances
Explanation :
Min. Clearance = Min Hole - Max.Shaft (Pin)

=(25+0.020) - (25+0.005)

=25020 - 25.005

=0.015 mm.

GATE - 2014 02
Question No.63

For the given assembly: 25 H7/g8, match Group A with Group B

Group A Group B
P. H I. Shaft Type
Q. IT8 II. Hole Type
R. IT7 III. Hole Tolerance Grade
S. g IV. Shaft Tolerance Grade

(A)P-I, Q-III, R-IV, S-II (B)P-I, Q-IV, R-III, S-II (C)P-II, Q-III, R-IV, S-I

(D)P-II, Q-IV, R-III, S-I

Show Answer

(D) P-II, Q-IV, R-III, S-I


Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances
GATE - 2012 01
Question No.3

+0.040

In an interchangeable assembly, shafts of size 25. 000 0.010


mm mate with holes of size
+0.030

25. 000 +0.020


mm . The maximum interference (in microns) in the assembly is

(A)40 (B)30 (C)20 (D)10

Show Answer

(C) 20
Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances

Question No.8 GATE - 2011 01

+0.015 +0.010

A hole is dimension 9 +0 mm. The corresponding shaft is of dimension 9 +0.001 mm. The
resulting assembly has

(A)loose running t (B)close running t (C)transition t (D)interference t

Show Answer

(C) transition t
Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances

GATE - 2010 01
Question No.20

0.009

A shaft has a dimension,? 35 0.025


. The respective values of fundamental deviation and tolerance
are

(A)0.025, 0.008 (B)0.025, 0.016 (C)0.009, 0.008 (D)0.009, 0.016

Show Answer

(D) 0.009, 0.016


Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances

Question No.49 GATE - 2009 02

What are the upper and lower limits of the shaft represented by 60 f8?

Use the following data:

Diameter 60 lies in the diameter step of 50-80 mm


Fundamental tolerance unit, i, in m = 0.45 D1/3 + 0.001 D, where D is the representative size in
mm;
Tolerance value for IT8=25i. Fundamental deviation for f shaft = -5.5D0.41

(A)Lower limit = 59.924 mm, Upper Limit = 59.970 mm<

(B)Lower limit = 59.954 mm, Upper Limit = 60.000 mm<

(C)Lower limit = 59.970 mm, Upper Limit = 60.016 mm

(D)Lower limit = 60.000 mm, Upper Limit = 60.046 mm

Show Answer

()
Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances

Question No.58

0.050
GATE - 2007 02

A hole is speci ed as 40 0.000 mm. The mating shaft has a clearance t with minimum clearance of
0.01 mm. The tolerance on the shaft os 0.04 mm. The maximum clearance in mm between the hole
and the shaft is

(A)0.04 (B)0.05 (C)0.10 (D)0.11

Show Answer

(C) 0.10
Subject : Metrology and Inspection
Topic : Limits, Fits and Tolerances

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