Welding Processes
EN358 – Ship Structures
A Brief History of Welding
Late 19th Century
Scientists/engineers apply advances in electricity to heat and/or join metals (Le Chatelier, Joule, etc.)
Early 20th Century
Prior to WWI welding was not trusted as a method to join two metals due to crack issues
1930’s and 40’s
Industrial welding gains acceptance and is used extensively in the war effort to build tanks, aircraft, ships, etc.
Modern Welding
the nuclear/space age helps bring welding from an art to a s ....etc

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1. While soldering what action is applied on solder?
(A)Capillary action(B)Gravitational force
(C )Electromagnetic force(D)Magnetic action

2.Which one of these a pressure welding method?
(A)ARC welding(B)Gas welding
(C )Resistance welding(D)Thermit(fusion) 

3.Which of the following is not an insulator?
(A)Gold(B)Glass
(C )Mica(D)Wood

4.Which type of fire extinguisher is used in a welding shop?
(A)Form type extinguisher(B) CO2 extinguisher
(C ) Dry powder extinguisher(D) Halon extinguisher

5.The term used ....etc

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I am a applicant so plg so the question bank ....etc

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Variable sweep wings
ABSTRACT
VARIABLE-SWEEP WING
A variable-sweep wing is a wing configuration that allows to alter planform for various flight conditions. A variable-sweep wing can be moved during flight-usually between a swept-back position and a straight position. This allows it to take advantage of the aerodynamics of a swept wing at high speeds while avoiding the drawbacks of such a design at lower speeds. It is successful in this respect, but the added mass and complexity required counter the benefits and stand ....etc

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ABSTRACT
Welding being the major asset and salvation for mechanical
engineering, the seminar is all about the automation of major welding
processes used in industries using robots, which was hitherto done
manually under hazardous and perilous working environs. The seminar
dwells with two major industrial welding processes namely continuous
arc welding process and spot welding process. It also connects with
essential features of the robots used in these welding processes and
also the adv ....etc

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please send me information about Stealth technology ....etc

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Methods of Aluminum Welding

Aluminum Welding Techniques

MIG Welding (Metal Inert Gas)- supplies power to wire fed through the center of gas cone, heat and filler are the same.
TIG Welding (Tungsten Inert Gas) or Heliarc – seperates the heat source from the filler material.

MIG Welding

Shield gas is 100% Argon
Faster than regular steel MIG welding, due to the higher thermal conductivity
Material must be very clean for effective weld
Good for long runs and heavy material

TIG Welding[ ....etc

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ABSTRACT
Stealth aircraft are aircraft that use stealth technology to make it harder to be detected by radar and other means than conventional aircraft by employing a combination of features to reduce visibility in the visual, audio, infrared and radio frequency (RF) spectrum. Well known examples include the United States' F-117 Nighthawk (1980s-2008), the B-2 Spirit Stealth Bomber, and the F-22 Raptor. While no aircraft is totally invisible to radar, stealth aircraft limit current conventional radar's abilities to detec ....etc

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Introduction:
Welding Processes:
Welding is the most economical and efficient way to join metals permanently. Welding is used to join all of the commercial metals and to join metals of different types and strengths.
A weld is produced either by heating the materials to the welding temperature with or without the application of pressure alone with or without the use of filler metal. There are different kinds of welding processes who all use different sources of heat, for instance arc welding which uses an electric ....etc

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Welding Processes
EN358 – Ship Structures
A Brief History of Welding
Late 19th Century
Scientists/engineers apply advances in electricity to heat and/or join metals (Le Chatelier, Joule, etc.)
Early 20th Century
Prior to WWI welding was not trusted as a method to join two metals due to crack issues
1930’s and 40’s
Industrial welding gains acceptance and is used extensively in the war effort to build tanks, aircraft, ships, etc.
Modern Welding
the nuclear/space age helps bring welding from an art to a s ....etc

[:=Read Full Message Here=:]