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
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
Read MoreE-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
Read MoreE-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
Read MoreRMI 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(
Read MoreDC-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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