Category: Engineering

How much gas does a furnace use per hour? The U.S. Department of Energy requires an AFUE of at least 90 percent for residential gas furnaces to receive an ENERGY STAR rating. This means an annual gas use of 660 therms at a cost of $660, or almost 31.7 cents an hour. How much does […]

What are the parts of a bill of materials? Every line of the bill of materials (BOM) includes the product code, part name, part number, part revision, description, quantity, unit of measure, size, length, weight, and specifications or features of the product. The engineering BOM is often organized by engineers based on a computer-aided design […]

What is the function of a power source in an electrical circuit? A power supply is an electrical device that supplies electric power to an electrical load. The primary function of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. Why are […]

Which of the following is the best reason for rapid prototyping? Rapid Prototyping helps designers present new concepts to board members, clients or investors so that they can understand and approve a development or product. This visualisation can also allows designers to gain ready feedback from customers and clients based on an actual physical product […]

Do you lubricate fuel injector O rings? Yes you have to lube them with something! When should I replace my fuel injector O rings? The following are some of the things that you will notice when it is time to have your fuel injector O-rings replaced: There is a noticeable fuel leak from where the […]

Do metallic crystals conduct electricity? 2: Metallic crystal lattice with free electrons able to move among positive metal atoms. Being composed of atoms rather than ions, they do not conduct electricity in any state. Why are metallic crystals good conductors of electricity? While ionic crystals alternate positive charges with negative charges, metallic crystals contain atoms […]

How does the soft palate affect the direction of the air stream? Pull-up of the soft palate moves it both upward and backward; this opens the fauces but narrows the velopharyngeal isthmus, potentially increasing resistance to airflow. Depression of the soft palate has the opposite effects. What happens to the soft palate in order to […]

How do you calculate specific volume of water? Specific Volume Formulas ν = V / m where V is volume and m is mass. ν = 1 /ρ = ρ-1 where ρ is density. ν = RT / PM = RT / P where R is the ideal gas constant, T is temperature, P is […]

Which is an example of an indirect measurement tool? With indirect measurements, the dimensions are measured using measuring instruments such as dial gauges that look at the difference between targets and reference devices such as gauge blocks and ring gauges. What is direct and indirect measurement? ‘Direct measurement’ refers to measuring exactly the thing that […]

When you look at a drawing How do you know if you are looking at us customary or SI measurements? 1. When you look at a drawing, how do you know if you are looking at U S Customary or SI measurements? Why is it important for an engineer to know this piece of information? […]