Underwater Tools: Hydraulic & Pneumatic Systems Guide

Underwater Tools

Hydraulic Tools

Operation: Based on the transmission of energy through fluid.

  • Energy is harnessed by a hydraulic motor, transforming it into mechanical work energy.

Component Parts:

  • Engine: An explosion or mechanical generator supplying electric power to the hydraulic pump.
  • Hydraulic Pump: Communicates mechanical energy to the engine through the fluid. Maintains adequate flow and pressure.
  • Fine Filter: Filters impurities from the oil to prevent system clogging.
  • Gauge: Indicates oil pressure
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Study of the Battery

A battery is any element capable of storing electrical energy for later use. The elements that form a battery are shown in the figure above. The liquid inside the battery is called the electrolyte, which is composed of a mixture of distilled water and sulfuric acid with a ratio of 34% sulfuric acid and the rest distilled water. The electrolyte level must be one inch above the plates.

Coupling Batteries

To achieve higher voltages (V) or battery capacity (Amp-hours Ah) than those available with standard

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E-commerce Fundamentals: A Comprehensive Guide

TRUE/FALSE

Write ‘T’ if the statement is true and ‘F’ if the statement is false.

1) E-commerce technologies provide a unique, many-to-many model of mass communication. T

2) Ubiquity lowers the cognitive energy required to transact in a marketspace. T

3) The fact that e-commerce is conducted on the basis of universal standards increases search costs for consumers. F

4) Cost transparency refers to the ease with which consumers can find out the variety of prices in a market. T

5) Universal standards make

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E-commerce Fundamentals: A True/False and Multiple Choice Quiz

TRUE/FALSE.

Write ‘T’ if the statement is true and ‘F’ if the statement is false.

1) E-commerce technologies provide a unique, many-to-many model of mass communication.  T

2) Ubiquity lowers the cognitive energy required to transact in a marketspace. T

3) The fact that e-commerce is conducted on the basis of universal standards increases search costs for consumers. F

4) Cost transparency refers to the ease with which consumers can find out the variety of prices in a market. T

5) Universal standards make

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RMI Architecture and Hibernate Implementation Guide

RMI Architecture

Controller

1) Controller instance

2) BusinessDelegate Server. Create controller, in the Controller setServer(new BusinessDelegate());, in the methods add BusinessException and Remote Excp.

Business Delegate

1) Class implements IAppRemote

2) IAppRemote BusinessService.

setBusinessService( (IAppRemote) Naming.lookup(IAppRemote.URL_SERVICIO) );
} catch (Exception e) {
throw new BusinessException(e.getMessage());

BusinessException

BusinessException extends Exceptions implements Serializable. BusinessException(

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DC-DC Converters and Battery Characteristics

DC-DC Converter Analysis

Boost Converter

A boost DC-DC converter switches at 100 kHz. The input is +12 V and the duty ratio of the transistor is 75%. The input inductor is 25 μH, and the output capacitor is 100 μF. If the load draws 50 W, the output voltage is found to be 48 V.

Output Voltage Calculation

What is the output voltage for a 10 W load? If L > Lcrit and C > Ccrit, then Vout/Vin = 1/D2. With a 50 W load, Vout = 48 V. This gives D2 = 0.25, so it would be continuous mode. For a 10 W

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