How can we increase the efficiency of a diesel engine? Run the engine fuel-lean, that is, use excess air. It is well known that fuel-lean running improves the efficiency. Higher compression ratio. We need new cycles put into practical use. Run the engine at optimum conditions, meaning low friction (modest engine speed) and low pumping […]
Why is bitumen used in road construction?
Why is bitumen used in road construction? Asphalt road surfaces are also considered a sustainable option for road paving material where bitumen is used as binder as this material can be recycled. The bitumen, produced by the refineries, plays an important role in road durability which is also important for sustainability. What is the purpose […]
What happens to the potential energy of a ball that is dropped from a height?
What happens to the potential energy of a ball that is dropped from a height? When a tennis ball is dropped from 2 m, it possesses a certain amount of gravitational potential energy because of its mass and its height above the ground. As the ball falls, that energy is converted to kinetic energy. How […]
What are the objectives of concrete mix design?
What are the objectives of concrete mix design? The main aim of the concrete mix design is to find out the desired proportion of each ingredients which are cement, coarse aggregate, fine aggregate, water etc. to obtain the required properties of resulting mix. What is class B concrete used for? at 28 Days psi Class […]
How does a cooling tower system work?
How does a cooling tower system work? Cooling tower systems work by using water to extract waste heat from a system and ejecting it into the atmosphere primarily through evaporation. The three key components of a cooling system are the cooling tower, recirculating pump, and heat exchanger. Water first passes through a heat exchanger where […]
What is the correct formula to add the values in cells A1 and B1?
What is the average amount of garbage per person?
What is the average amount of garbage per person? 4.40 pounds How much garbage do humans make every year? Exactly How Much Garbage Do Humans Make Every Year? The average American consumer produces just under five pounds of trash each day, while a family creates about 18 pounds. Multiplying those numbers by 365 days for […]
What is the NSPE board of ethical review?
What is the NSPE board of ethical review? The Board of Ethical Review is a panel of engineering ethics experts that has served as the profession’s guide through ethical dilemmas. The board consists of seven licensed members who are appointed by the NSPE president. Since 1954, the BER and its work has evolved with the […]
What are five advantages of work sampling over time study methods?
What are five advantages of work sampling over time study methods? Advantages of Work Sampling: (1) It is a cheaper technique than time study and production study. (2) Only one analyst can perform work sampling study of many activities. (3) Observers does not require much training. (4) It is more useful in non-repetitive and indirect […]
What is time variant and time invariant system?
What is time variant and time invariant system? In other words, a time delay or time advance of input not only shifts the output signal in time but also changes other parameters and behavior. Time variant systems respond differently to the same input at different times. The opposite is true for time invariant systems (TIV). […]