What factors influence the level of hardness? The greater the resistance capacity to deformation it is, the higher the hardness value it will have. There are many factors effect specimen’s hardness value, including its chemical component, organization structure, treatment process, and outer environment. What does hardness testing determine? What is the definition of hardness testing? […]
What is the compression ratio of axial flow compressor?
What is the compression ratio of axial flow compressor? approximately 1.25 to 1 What is a stage in axial flow compressor? The Axial Flow Compressor The compressor is a multistage unit as the amount of pressure increase by each stage is small; a stage consists of a row of rotating blades followed by a row […]
Why should you visually check for motorcycles when changing lanes?
Why should you visually check for motorcycles when changing lanes? When changing lanes or entering a major thoroughfare, make a visual check for motorcycles, in addition to using your mirrors. Motorcycles are small and this allows them to tuck easily into the blind spots of other vehicles. Motorcycles are entitled to the same full lane […]
What is the federal E-Rate program?
What is the federal E-Rate program? The universal service Schools and Libraries Program, commonly known as “E-rate,” provides discounts of up to 90 percent to help eligible schools and libraries in the United States obtain affordable telecommunications and internet access. How does the E-Rate program work? The Schools and Libraries (E-rate) Program provides discounts to […]
What is load cell working principle?
What is load cell working principle? Load cell is a sensor or a transducer that converts a load or force acting on it into an electronic signal. Resistive load cells work on the principle of piezo-resistivity. When a load/force/stress is applied to the sensor, it changes its resistance. Where is load cell used? A load […]
What makes a good conductor?
What makes a good conductor? In a conductor, the outer electrons of the atom are loosely bound and can freely move through the material when an electric charge is applied. In general, the best electrical conductors are metals. Metals tend to have electrons in the outer layer of their atoms that are freely shared. How […]
How far off is magnetic north from true north?
How far off is magnetic north from true north? about 500 kilometers Where is the true north? What is true north? True north is the direction that points directly towards the geographic North Pole. This is a fixed point on the Earth’s globe. Does a compass point to true north? A magnetic compass does not […]
What did the Clean Air Act authorize the EPA to do?
What did the Clean Air Act authorize the EPA to do? 42 U.S.C. Among other things, this law authorizes EPA to establish National Ambient Air Quality Standards (NAAQS) to protect public health and public welfare and to regulate emissions of hazardous air pollutants. What was the Clean Air Act and why was it so important? […]
What is evaporating temperature in refrigeration?
What is evaporating temperature in refrigeration? As its name implies, refrigerant in the evaporator “evaporates”. Upon entering the evaporator, the liquid refrigerant’s temperature is between 40° and 50°F; and without changing its temperature; it absorbs heat as it changes state from a liquid to a vapor. What controls the flow of refrigerant to the evaporator? […]
Is Unix a time-sharing operating system?
Is Unix a time-sharing operating system? IIX is a multi-processing and multi-user timesharing operating system. UNIX provides a great range of programs and services that have made the UNIX system environment popular among users. What is a UNIX based operating system? What is UNIX? UNIX is an operating system which was first developed in the […]