What is traffic volume in transportation? Volume Study Traffic volume is defined as the number of vehicles crossing a section of road per unit time at any selected period. Traffic volume studies are conducted to collect data on the number of vehicles and/or pedestrians that pass a point on a highway facility during a specified […]
What is the difference between Otto and Diesel cycle?
What is the difference between Otto and Diesel cycle? Otto cycle is used by petrol ignition whereas diesel engine uses the diesel cycle. Another noteworthy difference is that the Otto cycle heat occurs at constant volume, whereas the diesel cycle works on constant pressure…. What is meant by Otto cycle? An Otto cycle is an […]
What is an example of direct measurement?
What is an example of direct measurement? ‘Direct measurement’ refers to measuring exactly the thing that you are looking to measure, while ‘indirect measurement’ means that you’re measuring something by measuring something else. For example of direct measurement is weight, distance, and so on. What is an example of indirect measurement? Example of Indirect Measurement […]
How do you calculate heat load of shell-and-tube heat exchanger?
How do you write a good test question?
How do you write a good test question? 4 Big Rules for Writing Test Questions Write for Clarity. The best questions don’t require lengthy explanations, creative hypotheticals, or dramatic rewordings. Write for Brevity. Get a Reviewer. Answer Them Yourself Later. True or False Questions. Multiple Choice Questions. Short Answer Questions. Essay Questions. What questions are […]
How does a heat pump heating system work?
How does a heat pump heating system work? To provide heat, a heat pump works by extracting heat from the air outside of your home and transferring it to refrigeration coolant – the coolant is then compressed, which increases the temperature significantly; the coolant is then moved to the indoor unit of the heat pump, […]
What are the 3 parts of the 3D printing process?
What are the 3 parts of the 3D printing process? The 3 Basic Steps of 3D Printing Step #1) Modeling. Before a manufacturing company can build an object with a 3D printer, it must design the model using computer software. Step #2) Printing. The second step of 3D printing involves printing, or building, the object. […]
What happens when carbon content increases in steel?
What happens when carbon content increases in steel? Increasing carbon content increases hardness and strength and improves hardenability. But carbon also increases brittleness and reduces weldability because of its tendency to form martensite. Most steel contains less than 0.35 percent carbon. How does carbon increase the strength of steel? The use of carbon makes iron […]
Why is energy not always conserved?
Why is energy not always conserved? When we don’t ignore outside forces, such as those just mentioned, mechanical energy is not conserved. Energy is “lost” to friction in the sense that it is not converted between potential and kinetic energy but rather into heat energy, which we cannot put back into the object. Can energy […]
What enters the cylinder on the intake stroke of a diesel engine?
What enters the cylinder on the intake stroke of a diesel engine? When the piston is at the top of its cylinder it is on its compression stroke. The cylinder is filled with pressurized, super heated air. Diesel fuel is injected and ignites. How is the fuel delivered into the cylinder of a diesel engine? […]