Category: Engineering

What is the hierarchy of control measures? The hierarchy of control is a system for controlling risks in the workplace. Eliminating the hazard and risk is the highest level of control in the hierarchy, followed by reducing the risk through substitution, isolation and engineering controls, then reducing the risk through administrative controls. What are the […]

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 […]

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? […]

What are 3 advantages of word processing software? Advantages of Word Processing Quality : It produces error free documents. Storage of Text : We can take any number of copies with word processor. Time Saving : We can get any number of copies of document in future without retyping. Security : We can protect the […]

How do you measure viscosity using a viscometer? BACKGROUND Ostwald viscometer is use to determine viscosity of Newtonian fluid. η1 can be determine using following equation. η1=ʆ1t1/ ʆ2t2 X η2 ʆ1=Density of unknown liquid. t1 =Time of flow of unknown liquid. ʆ2 =Density of standard liquid. t2 =Time of flow of standard liquid. η2=Viscosity of […]

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 […]