Page 129 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

Job Sequence

Note : Instructor shall demonstrate on angle measurement using angle gauge and bevel protractor
• Trainees should be able to build different angle using angle gauges
• Trainees should measure the angle of work piece provided by the instructor and record it in table 1.
Note: The instructor may check the buildup angle of angle gauge and evaluate

Table - 1
Component Angle
1
2

3
4
5

Skill Sequence

Building up a combination

Objectives : At the end of this exercise you shall be able to
• build up angle using angle gauge.

To build up a size of 27° 9’ 9” (Fig 1) Gauge required
Fig 1
1st series - 27° 0’ 0”
2nd series - 0° 9’ 0”
3rd series - 0° 0’ 6”

Additional
Block - 0° 0’ 3’’
27° 9’ 9”

To obtain an angle of 27°-8’-51” the same gauges may be used, but they must be wrung together as shown in Fig 2.
Work out the
Fig 2
Gauges required for 27° 8’ 51”
1st series 27° 0’ 0”

2nd series 0° 9’ 0” To be added
3rd series 0° 0’ 6” To be subracted
4th series 0° 0’ 3” From the sum of the

1st and 2 nd series as these two are positioned in the opposite way.

Note : If the angle includes minutes, and is greaterthan 40 minutes, increase the angle by 1° and
subtract the number of minutes necessary to obtain the required minute.

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CITS : C G & M - Fitter - Exercise 80 & 81