What is a feedback control system? A feedback control system is a system whose output is controlled using its measurement as a feedback signal. This feedback signal is compared with a reference signal to generate an error signal which is filtered by a controller to produce the system’s control input. Which is the output of […]
What is twinning in plastic deformation?
What is twinning in plastic deformation? In twinning each plane of atoms move through a definite distance and in the same direction. When a shear stress is applied the crystal will twin about the twinning plane in such a way that the region to the left of the twinning plane is not deformed where as […]
Why do engineers place tolerances on dimensions?
Why do engineers place tolerances on dimensions? Engineers place tolerance on dimensions to allow variances in an acceptable range in order to make a product function properly. The amount of tolerance depends on the degree of variations in a particular object. Why are tolerances used in engineering? Tolerance is the acceptable range for a physical […]
How do you find concentration in MLSS?
How do you find concentration in MLSS? Mixed liquor suspended solids are the solids under aeration. MLSS is measured by filtering a known volume of the mixed liquor sample, which is the same way that suspended solids are measured in wastewater. Some of the MLSS may be an inorganic material. What causes high ammonia in […]
How did humans modify the environment to build railroads?
How did humans modify the environment to build railroads? Digital Public Library of America. Human modifications include paving over vegetated areas, constructing buildings, building bridges, draining wetlands, removing or adding trees, building dams, irrigating etc. How were Native Americans impacted by the construction of the transcontinental railroad? The construction of the Transcontinental Railroad had dire […]
What is the mechanical advantage of three pulleys?
What is the mechanical advantage of three pulleys? A 3:1 pulling on another 3:1 gives you a mechanical advantage of 9:1. A system that is neither simple or compound is a complex pulley system. The 5:1 shown is a complex system. As the mechanical advantage increases, the amount of rope that must be pulled through […]
What is technology and example?
What is technology and example? Technology is the way we apply scientific knowledge for practical purposes. It includes machines (like computers) but also techniques and processes (like the way we produce computer chips). In fact, a hammer and the wheel are two examples of early human technology. What is world technology? “The World Technology Network […]
What is bioremediation of soil?
What is bioremediation of soil? Bioremediation is a branch of biotechnology that employs the use of living organisms, like microbes and bacteria, in the removal of contaminants, pollutants, and toxins from soil, water, and other environments. Bioremediation is used to clean up oil spills or contaminated groundwater. What are some examples of bioremediation? Bioremediation companies […]
What is the difference between crystal structure and crystal system?
What is the difference between crystal structure and crystal system? Answer: A crystal structure is described by both the geometry of, and atomic arrangements within, the unit cell, whereas a crystal system is described only in terms of the unit cell geometry. For example, face-centered cubic and body-centered cubic are crystal structures that belong to […]
What is flowmeter sensor?
What is flowmeter sensor? A flow meter (or flow sensor) is an instrument used to measure linear, nonlinear, mass or volumetric flow rate of a liquid or a gas. How does a flow sensor work? The sensor works by measuring the cooling effect of the gas passing over a thin, heated wire. The higher the […]