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Working Chamber of EBW
The chamber is usually rectangular in shape and has heavy windows to permit viewing the work. Both high voltage machines and low voltage machines are available with work chamber that can be evacuated to high vacuum (or partial vacuum (10-4).The basic requirements of vacuum is the electrons need to flow in a beam from the emitter to the target unimpeded by the presence of any gas molecules that may cause scattering and slow down of the beam. The source of electrons is a tungsten filament heated to around 2200 °C. At this temperature, the filament will oxidise very quickly because of the presence of oxygen in air. The pumping equipment is usually completely automatic once the set up has been completed.
Derive the relation ship between volumetric efficiency & clearance.
Age-hardening of Aluminium Alloys In specific alloys precipitation from a single phase may arise. The precipitate phase might be in form of determine sub-microscopic particles
Measurement of Hardenability: Two testing techniques have been enhancement to measure the harden-ability of steels. The first, termed as cylinder series test, offers a single
what is the meaning of translating roller follower and total follower travel?
Disc clutch friction thickness: Check disc clutch friction thickness which should be minimum of 2.6 mm.
type of furances and disadvantage advantage
explain about pnp transistor
Find out the angle of force: Q: A uniform wheel having 60 cm diameter weighing 1000 N rests against rectangular obstacle 15 cm high. Find least force required which when ac
What is the use of Spindle in Radial drilling machine The spindle holds the drill or cutting tools and revolves in a fixed position in a sleeve.
Cell Connectors A cell connector connects the nearby cell with two terminals of opposite polarity (sign). Post strap connect the plates to the terminal. Electrolyte
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