he maximum interference in mm after assembly between a bush of size \(30_{ + 0.03}^{ + 0.06}\) mm and shaft of size \(30_{ - 0.02}^{ + 0.04}\) mm is

This question was previously asked in
ISRO LPSC Technical Assistant Mechanical 23 Feb 2020 Official Paper
View all ISRO Technical Assistant Papers >
  1. 0.07
  2. 0.02
  3. 0.05
  4. 0.01

Answer (Detailed Solution Below)

Option 4 : 0.01
Free
ISRO Technical Assistant Mechanical Full Mock Test
2.7 K Users
80 Questions 80 Marks 90 Mins

Detailed Solution

Download Solution PDF

Concept:

Interference fit: Interference is the difference between the size of the hole and the size of the shaft which is always negative i.e. shaft is always larger than the hole size. Here the tolerance zone of the hole will be below the tolerance zone of the shaft.

Maximum Interference = Upper limit of the shaft – Lower limit of hole

Fitter 34 20Q Hindi - Final images q18a

Calculation:

Given:

Hole \(30_{ + 0.03}^{ + 0.06}\)  mm, Shaft  \(30_{ - 0.02}^{+ 0.04}\) mm

Upper limit of shaft = 30 + 0.04 = 30.04 mm

Lower limit of hole = 30 + 0.03 = 30.03 mm

Maximum Interference = Upper limit of the shaft - Lower limit of hole

Maximum Interference = 30.04 - 30.03 = 0.01 mm
Latest ISRO Technical Assistant Updates

Last updated on May 30, 2025

-> The ISRO Technical Assistant recruitment 2025 notification has been released at the official website. 

-> Candidates can apply for ISRO recruitment 2025 for Technical Assistant from June 4 to 18.

-> A total of 83 vacancies have been announced for the post of Technical Assistant.

-> The Selection process consists of a written test and a Skill test.

-> Candidates can also practice through ISRO Technical Assistant Electrical Test Series, ISRO Technical Assistant Electronics Test Series, and ISRO Technical Assistant Mechanical Test Series to improve their preparation and increase the chance of selection. 

Get Free Access Now
Hot Links: teen patti joy apk teen patti stars teen patti star teen patti winner