Bissoy.com
Doctors Medicines MCQs Q&A

How many grades of tolerances does the ISO system of limits and fits specify? 

How many grades of tolerances does the ISO system of limits and fits specify?  Correct Answer 18

Explanation:

Limits and fits comprise 18 grades of fundamental tolerances for both shaft and hole, designated as IT01, IT0 and IT1 to IT16.

These are called standard tolerances.

Grades of Tolerance: Grade is an indication of the level of accuracy.

IT grades

Used for

IT01 to IT4 

For the production of gauges, plug gauges, measuring instruments

IT5 to IT7 

For fits in precision engineering applications

IT8 to IT11

For General Engineering

IT12 to IT14

For Sheet metal working or press working

IT15 to IT16

For processes like casting, general cutting

Related Questions

How many grades of tolerances are there according to BIS system fits and tolerances?
Performance of 1800 students in grades has been shown in the following pie chart. In which two grades taken together is the number of students 54 less than the number of students in grades B and E taken together?
An intelligent boy is doing a jigsaw with 275 pieces. Each day that he fits pieces together there are fewer pieces left, and it is reasonable to assume that he fits more pieces each day because the number left to sort out diminishes progressively. Hence he is able to fit an extra piece as each day goes by. On the first day he fits 20 pieces. How many days does it take for him to complete the puzzle ?
SN1 reaction undergoes through a carbocation intermediate as follows: (X = Cl, Br, I) The correct statements are: I. The decreasing order of rate of SN1reaction is t-BuX > iso-PrX > EtX > MeX II. The decreasing order of ionization energy is MeX > EtX > iso-PrX > t-BuX III. The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX
There are five friends F, G, K, O, and P, who got different grades A, B, C, D, E in an examination, where A grade means lowest and E means highest grades. F neither got highest nor lowest grade. Number of peoples having higher grade than K and number of peoples having lower grade than K are equal. O gets the lowest grade among them. G does not get highest grade but his grade is better than K. Who got grade B?
On a certai project, the only grades awarded were 745 and 100. If 85 students completed the projects and the average of their grades was 85, how many of them did score 100?
One a certain project, the only grades awarded were 75 and 100. If 85 students completed the projects and the average of their grades was 85, how many of them did score 100?
Two statements are given followed by two conclusions as responses. You have to consider the statements to be true even if they seem to be at variance from the commonly known facts. You have to decide which of the given conclusion(s) can definitely be drawn from the given statements. Statements: The education system failed to nurture children as they feel pressured to get high grades. Depression is very common among school students. Conclusions: Students suffer from depression as subjects of their interests are not being taught in schools.        II. Pressure to get high grades can be the cause of depression among students.
I.S. specifies following total number of grades of tolerances
Following table shows the grades obtained by the students of four sections viz. A, B, C and D of class Tenth of Ram Manohar Boys School. Answer the following questions using the information provided.   Grades Sections First Second Third A 12 18 25 B 10 23 17 C 8 22 15 D 14 24 12 If a student of class tenth of the school is randomly selected, what are the chances that he either “belongs to section B and got first grade” or “belongs to section D and got third grade”?