What is the function of a compressor in a vapor compression refrigeration system? It works as a pump to control the circulation of the refrigerant, and it adds pressure to the refrigerant, heating it up. The compressor also draws vapor away from the evaporator to maintain a lower pressure and lower temperature before sending it […]
Who may determine if an aircraft may be operated with inoperative equipment?
Who may determine if an aircraft may be operated with inoperative equipment? Finally, a pilot, who is certificated and appropriately rated under 14 CFR part 61, or a person, who is certificated and appropriately rated to perform maintenance on the aircraft, must determine that the inoperative instrument or equipment does not constitute a hazard to […]
What is PWM voltage?
What is PWM voltage? PWM applies the power in digital pulses of regulated voltage. Even between the pulses, inertia keeps the motor and fan from stopping. As a result, most PCB designs that require some type of motor speed control use PWM. The PWM duty cycle refers to the “on” state versus the “off” state. […]
What is the formula for endpoint?
Why was the National Historic Preservation Act passed?
Why was the National Historic Preservation Act passed? The National Historic Preservation Act of 1966 was passed primarily to acknowledge the importance of protecting our nation’s heritage from rampant federal development. It was the triumph of more than a century of struggle by a grassroots movement of committed preservationists. When was the National Historic Preservation […]
What are the stages of fatigue failure?
What are the stages of fatigue failure? Stages of fatigue failure Stage 1- Initiation. Initiation is the most complex stage of fatigue fracture and is the stage most rigorously studied by researchers. Stage 2 – Propagation. The propagation stage of fatigue causes the microcrack to change direction and grow perpendicular to the tensile stress. Stage […]
Can Brake Drums be machined?
When should you use a portable fire extinguisher?
When should you use a portable fire extinguisher? The first and most important purpose of a portable fire extinguisher is to help people escape. Portable fire extinguishers can clear fire away from your escape route or help keep an exit open for others. You should know where extinguishers are located and how to operate them. […]
Are all transmission fluids the same?
Are all transmission fluids the same? They are not all the same. Moreover, if your vehicle is still under warranty, using a fluid thatis not approved by the vehicle manufacturer will void the transmission warranty. Automobile companies develop automatic transmission fluids, or at least set specifications for them. But the car companies don’t make ATF. […]
Why are hardness tests performed?
Why are hardness tests performed? The application of hardness testing enables you to evaluate a material’s properties, such as strength, ductility and wear resistance, and so helps you determine whether a material or material treatment is suitable for the purpose you require. Why are different hardness tests and scales required? Different test scales were created […]