Homework SourseQuestion 8 ample 9100 than 7 A certain hydraulic oil has cle
Solution
Since the given data in Table 1 is for number of particles in 1ml of oil, then for 10 ml of oil it will be
Range
Number of Particles
per 10 ml
Number
More than
Up to and including
24
8,00,000
16,00,000
23
4,00,000
8,00,000
22
2,00,000
4,00,000
21
1,00,000
2,00,000
20
50,000
1,00,000
19
25,000
50,000
18
13,000
25,000
17
6,400
13,000
16
3,200
6,400
15
1,600
3,200
14
800
1,600
13
400
800
12
200
400
11
100
200
10
50
100
9
25
50
8
13
25
7
6.4
1.3
6
3.2
6.4
From the given limits if i have taken take their mid values, then for given ISO code 16/15/13 we take particles per 10 ml as following:
>4 microns for ISO code 16 = 480 p/10ml
>6 microns for ISO code 15 = 240 p/10ml
>14 microns for ISO code 13 = 60 p/10ml
If we draw a graph where in the horizontal axis we have the microns and in the vertical axis we have the particles per 10 ml, we find that number of particles larger than 7 microns are 180 per 10 ml of the oil.
| Range | Number of Particles | |
| Number | More than | Up to and including |
| 24 | 8,00,000 | 16,00,000 |
| 23 | 4,00,000 | 8,00,000 |
| 22 | 2,00,000 | 4,00,000 |
| 21 | 1,00,000 | 2,00,000 |
| 20 | 50,000 | 1,00,000 |
| 19 | 25,000 | 50,000 |
| 18 | 13,000 | 25,000 |
| 17 | 6,400 | 13,000 |
| 16 | 3,200 | 6,400 |
| 15 | 1,600 | 3,200 |
| 14 | 800 | 1,600 |
| 13 | 400 | 800 |
| 12 | 200 | 400 |
| 11 | 100 | 200 |
| 10 | 50 | 100 |
| 9 | 25 | 50 |
| 8 | 13 | 25 |
| 7 | 6.4 | 1.3 |
| 6 | 3.2 | 6.4 |
