Engineering

Heres an easy and very helpful guide you can use on leveling up engineering quickly.

Journeyman Engineering
1 to 20 Rough Blasting Powder
20 to 30 Rough Dynamite
30 to 45 Handful of Copper Bolts
45 to 50 Rough Copper Bomb
50 to 65 Copper Tube
65 to 75 Copper Modulator
Mats used:
199x Copper Bar
40x Rough Stone
46x Linen Cloth
20x Weak Flux
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Expert Engineering
75 to 85 Coarse Blasting Powder
85 to 90 Coarse Dynamite
90 to 100 Target Dummy
100 to 110 Silver Contact
110 to 115 Practice Locks
115 to 130 Deadly Blunderbuss
130 to 145 Heavy Blasting Powder
140 to 150 Crafted Solid Shot
Mats used:
20x Bronze Bar 13x Wool Cloth
13x Silver Bar 7x Weak Flux
49x Coarse Stone 20x Wooden Stock
13x Copper Modulator 200x Heavy Stone
106x Handful of Copper Bolts 40x Medium Leather
20x Copper Tube 7x Linen Cloth
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Artisan Engineering
150 to 153 Gold Power Core
153 to 160 Aquadynamic Fish Attractor
160 to 170 Blue/Green/Red Firework
170 to 175 Iron Strut
175 to 195 Solid Blasting Powder
195 to 205 Big Iron Bomb
205 to 220 Unstable Trigger
Mats used:
56x Bronze Bar 60x Mageweave Cloth
160x Bronze Bar 40x Heavy Leather
60x Mithril Bar 28x Nightcrawlers
12x Gold Bar 40x Silver Contact
28x Coarse Blasting Powder 13x Gold Power Core
160x Heavy Blasting Powder 240x Solid Stone
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Master Engineering
250 to 260 Dense Blasting Powder
260 to 263 Dense Dynamite
263 to 280 Thorium Widget
280 to 285 Thorium Tube
285 to 300 Thorium Shells
Mats used:
180x Mithril Bar 88x Dense Stone
151x Thorium Bar 63x Runecloth
60x Solid Blasting Powder 60x Unstable Trigger

Engineering is a very fun and creative Profession. You can create all kinds of wacky things that are fun to use and also entertain and amaze other players. Engineering is used to assemble metal and stones into parts needed to make explosives, guns, scopes, bullets, mechanical dragons, aquatic helmets, and much more. More than any other Profession, engineering products require several steps to be completed. Most items created by engineers can only be used by engineers. You can sometimes create something you can sell to another engineer. Many engineering recipes require a lot of different parts before the item can be created. This will require more space in your bags than other Professions.
If you plan on being an engineer, you should probably already be a miner. Miners collect ore and smelt ore into bars to create the majority of engineering items. Engineer recipes often include jewels, which are found in a variety of places. Typically, most engineers buy or are given rare jewels from other players. The auction house is a good place to buy gems if you can't mine them yourself. Some engineer recipes require leather, which you will need to buy from a skinner or the auction house. You will need to find a lot of other odd ingredients for your recipes that might need to be purchased from other players. Some items can actually be fished up with the fishing skill or found from monster drops or treasure chests.

Becoming an Engineer

First, you need to find an engineering trainer. Ask a guard for directions in a big city. After you have learned basic engineering, open up your abilities book (hit 'p') and look for the "Engineering" icon that has been added to your abilities.

Sample Engineering Items

These sample items might convince you it's time to become an engineer:

- Coarse Dynamite - Inflicts X to Y damage in a Z yard radius.
- Big Bronze Bomb - Inflicts X to Y damage and stuns targets for Z seconds in an N yard radius.
-Mechanical Squirrel - Create a mechanical squirrel that will follow you around as your pet. It serves no purpose other than to entertain people. You can hand out the squirrels to other people as gifts or even sell them. "It doesn't do anything, but boy, it's cute!"
-Small Seaforium Charge - Use an explosive charge to open simple locked doors.
-Goblin Land Mine - Places the Goblin Land Mine on the ground. It will explode the next time a hostile creature passes near.
-Explosive Sheep - Summons an Explosive Sheep which will charge at a nearby enemy and explode.
-Goblin Jumper Cables - Jumper Cables will sometimes be able to shock a dead player back to life. Be warned that they are experimental and may explode.

Additional information

Schematics
The engineering trainer has some very cool engineering plans. However, there are many more interesting and desirable plans out there to find from monster drops. You will likely have to buy these from other players or get them from friends if you aren't lucky enough to get them yourself. You can also find them at the auction house, treasure chests, or by gaining reputations.
Gnomish and Goblin Engineering
After you think you have mastered Engineering, you are offered a chance to specialize in either Gnomish or Goblin Engineering. You must first reach 200 skill and level 35. Alliance players can then speak to Lilliam Sparkspindle in Stormwind City. Horde players can talk to Tinkerwiz in Ratchet. Then you will be offered some quests to open new recipes for that school of engineering. Oglethorpe Obnoticus is the master Gnomish trainer and is found in Booty Bay. Buzzek Bracketswing is the master Goblin Engineer in Tanaris, Gadgetzan. Once you've selected your side, you cannot switch to the other. You should choose based on what recipes are available. There are some very cool and unique recipes for each side. You have to pick which ones you like the best. It can be a hard decision, they're both good

Repair Robot
An engineering recipe is available in Blackrock Depths for a repair robot. Next to Golem Lord Argelmach, there is a scroll that can teach you the schematic. You must have 300 engineering. This robot acts as a repair vendor for 10 minutes and will repair and purchase items for normal cost. This will allow dungeon groups and raids to get items repaired and sold without returning to town. These are very useful in raids. "Does someone have a repair bot?"

Random Info

Engineering is good for PvP and for a few items useful in raids.
Artisan Trainers: For the Alliance, Springspindle Fizzlegear found in Ironforge, Tinkertown. For the Horde, Roxxik is located in Orgrimmar.
Gnomes have a racial ability of +15 to Engineering. This allows them to reach Artisan Engineering prior to level 35. Some defenders can be summoned by the Gnome that are higher level thanks to this bonus to engineering.
You can create area of effect and direct damage explosives that you can use during combat. You can also give or sell these to other players.
Scopes do not require the Engineering skill to equip. You can sell scopes to other players or in the auction house. Whenever someone upgrades their gun they should also want a new scope.
The level of the Mechanical Dragonlings, Battlechicken, and Bombs dropped by the Goblin Bomb Dropper scale with your engineering skill, so they will be always useful against enemies.
You can find engineering devices as drops on higher level (50+) dungeons and in raids.
Bombs cause a disorient effect when they go off.
Target Dummies generate an initial taunt pulse so creatures will attack them for the first 5 seconds after they are dropped.
Both types of the engineer-made Jumper Cables share a cooldown.