What is the efficiency of a combined cycle power plant? The steam from waste heat is run through a steam turbine to provide supplemental electricity. The overall electrical efficiency of a combined-cycle power system is typically in the range of 50–60% — a substantial improvement over the efficiency of a simple, open-cycle application of around […]
Why are molecules able to move away from each other in the gas phase?
Why are molecules able to move away from each other in the gas phase? Substance A changed phase because the weak attraction between its molecules allowed them move faster. It is now a gas. In what phase of matter are the particles no longer moving? In a solid, particles are packed tightly together so they […]
How do you isolate a variable with two variables?
At what speed should shifting from first to second gear be done at?
At what speed should shifting from first to second gear be done at? 1500-2000 RPM What happens when you shift gears? When you change gear, you shift the chain from one pair of sprockets to another. For cycling at speed, you’ll use a larger sprocket on the pedal wheel than on the back wheel. That’s […]
What is meant by air standard efficiency?
What is meant by air standard efficiency? Air standard efficiency is taken as the ideal efficiency of an internal combustion engine. This would mean that whatever the temperature of the charge reached during combustion, the final temperature would have to be absolute zero. This implies that the exhaust gases would have to be -273″С. What […]
How long does a NOx sensor last?
How long does a NOx sensor last? between 50,000 and 60,000 miles What is a BMW NOx sensor? The sensor, mounted on the exhaust system before the catalytic converter, measures the level of nitrogen oxide (i.e. NOx) to feedback data to the engine’s computer so adjustments to valve timing and fuel mixture can be made. […]
What is heat treatment and why is it done?
What is heat treatment and why is it done? Heat treatment is commonly used to alter or strengthen materials’ structure through a heating and cooling process. It offers many advantages, including: It can change a material’s physical (mechanical) properties and it aids in other manufacturing steps. It relieves stresses, making the part easier to machine […]
What are employers required to do to keep employees safe from Caught in?
What are employers required to do to keep employees safe from Caught in? Question: What Are Employers Required To Do To Keep Employees Safe From Caught-in And -between Hazards From Hand-held Power Tools? Select All That Apply Forbid Them Maintain Them Guard Them Limit Their Use. What must employers do to comply with OSHA’s regulations […]
What does a psychrometric chart show?
What does a psychrometric chart show? Psychrometric Chart and Air Characteristics. A psychrometric chart presents physical and thermal properties of moist air in a graphical form. It can be very helpful in troubleshooting and finding solutions to greenhouse or livestock building environmental problems. How do you find vapor pressure from psychrometric chart? Locate the vapor […]
What is the formula for spindle speed?
What is the formula for spindle speed? The following equation is used to cal-culate spindle speed: rpm = sfm ÷ diame-ter × 3.82, where diameter is the cutting tool diameter or the part diameter on a lathe in inches, and 3.82 is a constant that comes from an algebraic simplifica-tion of the more complex formula: […]