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Ball bearing:Low friction bearing used to support radial loads in automotive applications. | |
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Ball joint:
If the ball joints are fitted to the track control rod, they may be called 'track control rod ends'. These have the same basic construction as the ball joint, they are just named differently because of where they are used. Read more here on ball joints and check out the overall layout of the steering system here. | |
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ball pein hammer:![]() | |
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BAM Civil:
BAM Civil prides itself on delivering quality projects safely, on time and within budget. Innovative solutions, engineering ingenuity, adherence to the highest safety and quality standards and professional construction management are the hallmarks of BAM contracts. Read More... Company Contact: Adrienne Bryan Apprentices: Kevin Cross (g1cp13a) |
Bar:A bar is a measure of pressure. 1 bar = 100 kPa, or 1 bar = 100,000 Pascals. The conversion factor to the Imperial way of measuring pressure is 14.5 In other words to convert bar to psi (pounds per square inch), multiply by 14.5. Example: Convert 2 bar to psi. Although bar and atmospheres (atm) are very similar ways to measure pressure, they are not the same: |
Barry Drennan:Company Contact for Reel-Tech Telephone: 01 8015871; Mobile:087 6388955 Apprentices:
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Base Derived Unit:In the SI, there are 7 base units of measurement. The ones we come across in the phase 2 course are:
Other units of measurement such as those for torque, speed, power etc. are all based on SI units of measurement, so they are said to be 'base derived' units of measurement. | |
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Base limiting resistor:A base limiting resistor is inserted into an electronic circuit in order to protect the delicate base/emitter circuit of a transistor. Unlike the more robust collector/emitter, the base/emitter circuit cannot pass large currents, it can only pass small currents. The transistor works by taking the small base/emitter current and amplifying it-allowing a much larger collector emitter current to flow. In order to limit the current flowing into the base of a transistor, we fit a resistor in series into the circuit. This has the effect of limiting the current flowing into the base/emitter circuit of the transistor. Note:- | |
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Battery:In DC electricity, a single source of that energy is known as a cell. When we join cells together in series, parallel or series parallel, we then have a battery of cells, or just simply a battery. When deciding to join single cells in series or in parallel, we consider what we are trying to achieve:
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Battery Hydrometer:
During your phase 2 course, you will use hydrometers on two occassions:
On the right we can see an actual hydrometer. It is a floating device. The denser the liquid, the higher it will float, and give a reading of the liquid density on its graduated stem. The instrument is basically a glass tube with lead shot at one end and a graduated scale at the other. The instrument is used to compare the density of whatever liquid it is immersed in to the density of water. Water is said to have a density of one, so the electrolyte from a fully charged battery would be 28% more dense-1.28. Functions, Operation and Use of the Hydrometer:
Using the hydrometer:
Go to each cell in turn. Agitate the electrolyte in the cell. Then take the electrolyte into the instrument. If any of the battery plate active material has broken away, the electrolyte will be discoloured, so make sure the electrolyte is clear. Induce enough electrolyte into the instrument to ensure the hydrometer is fully afloat. Be careful not to induce too much electrolyte, as it would cause the hydrometer to rise too much and strike the top of the instrument, giving you a false reading. Make sure the hydrometer is fully and freely afloat. Read off on the scale provided to see the relative density of the elctrolyte. During the induction phase of the course, you will be issued (at your own expense) with a battery hydrometer. | |||
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