Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.

Manufacturing And Production Technology
Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.

5.03 rpm, 600 joules

2.17 rpm, 600 joules

6.8 rpm, 6 joules

22 rpm, 600 joules

5.03 rpm, 600 joules

2.17 rpm, 600 joules

6.8 rpm, 6 joules

22 rpm, 600 joules

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Manufacturing And Production Technology
The abrasive recommended for grinding materials of high tensile strength is

Aluminium oxide

Silicon carbide

Diamond

Sand stone

Aluminium oxide

Silicon carbide

Diamond

Sand stone

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Manufacturing And Production Technology
Ceramic tools are fixed to tool body by

Soldering

Welding

Brazing

Clamping

Soldering

Welding

Brazing

Clamping

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Manufacturing And Production Technology
Threading is an operation of

Smoothing and squaring the surface around a hole

Producing a hole by removing metal along the circumference of a hollow cutting tool

Cutting helical grooves on the external cylindrical surface

Sizing and finishing a small diameter hole

Smoothing and squaring the surface around a hole

Producing a hole by removing metal along the circumference of a hollow cutting tool

Cutting helical grooves on the external cylindrical surface

Sizing and finishing a small diameter hole

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Manufacturing And Production Technology
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around

2550°C

3200°C

2900°C

3500°C

2550°C

3200°C

2900°C

3500°C

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Manufacturing And Production Technology
The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is

1.32

1.82

1.02

1.66

1.32

1.82

1.02

1.66

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Manufacturing And Production Technology

Manufacturing And Production Technology The abrasive recommended for grinding materials of high tensile strength is

Manufacturing And Production Technology Ceramic tools are fixed to tool body by

Manufacturing And Production Technology Threading is an operation of

Manufacturing And Production Technology In Oxyacetylene gas welding, temperature at the inner cone of the flame is around

Manufacturing And Production Technology The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is

Manufacturing And Production Technology
The abrasive recommended for grinding materials of high tensile strength is

Manufacturing And Production Technology
Ceramic tools are fixed to tool body by

Manufacturing And Production Technology
Threading is an operation of

Manufacturing And Production Technology
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around

Manufacturing And Production Technology
The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is