How are conductor sizes expressed? Conductor sizes are expressed in American Wire Gage (AWG) or in circular mils. Conductor sizes found in Chapter 9, Table 8 of the National Electrical Code® start with 18 AWG (the smallest size) and end up at 2000 circular mils (the largest size). How is wire diameter expressed in the […]
Which element forms a protective coating when it rusts?
Which element forms a protective coating when it rusts? chromium How is filiform corrosion treated? This type of filiform corrosion can damage all types of aluminum products such as wheels, automobile bodies and aircrafts. To repair the effect requires sanding and the application of a new layer of coating. To prevent filiform corrosion, proper surface […]
Which metal is used for galvanizing?
Which metal is used for galvanizing? zinc coating What is the process of galvanizing steel? Hot dip galvanizing is the process of coating iron or steel with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 450 °C (842 °F). Galvanizing is probably the most […]
What does a comparator circuit do?
What does a comparator circuit do? A comparator circuit compares two voltages and outputs either a 1 (the voltage at the plus side; VDD in the illustration) or a 0 (the voltage at the negative side) to indicate which is larger. Comparators are often used, for example, to check whether an input has reached some […]
What are the types of degradation?
What are the types of degradation? Introduction Types of soil degradation. Soil degradation can be classified into four main types of degradation: water erosion, wind erosion, chemical deterioration and physical deterioration. Water erosion. Wind erosion. Chemical deterioration. Physical deterioration. Human causes of erosion. Control of erosion. Conclusion. What are the 2 reasons for land degradation? […]
How does a shell and tube heat exchanger work?
What are the movements of an airplane?
What are the movements of an airplane? There are three types of movement of an aircraft: pitch, yaw, and roll. Roll is controlled by the ailerons and rotates the airplane. Yaw turns the airplane and is controlled by the rudder. Finally, pitch is controlled by the elevator and changes the altitude of the airplane. What […]
What does a negative reading on a voltmeter mean?
What does a negative reading on a voltmeter mean? If they are switched, there will be a negative voltage. If the poles of your voltmeter are correctly connected, there is a possibility that the battery suffered a phenomenon called “polarity reversal”. This is a rare phenomenon that can happen at the end of a discharge […]
Why is the mechanical advantage of a screw always greater than 1?
Why is the mechanical advantage of a screw always greater than 1? The mechanical advantage of a screw is always greater than 1 because the output force applied by the screw is greater than the input force applied to the screw. What is a mechanical advantage less than 1? Mechanical advantage is defined as the […]
Where does hydro electricity come from?
Where does hydro electricity come from? Hydroelectric power is a renewable energy source which harnesses the power of moving water to produce electricity. The hydroelectric process starts long before you turn your light on at home or work. Large scale hydroelectricity projects typically involve dams. Which method is used to produce electricity in a hydroelectric […]