Category: Engineering

Which dimensionless number is used in forced convection? In forced convection the Reynolds number governs the fluid flow. But, in natural convection the Grashof number is the dimensionless parameter that governs the fluid flow. Using the energy equation and the buoyant force combined with dimensional analysis provides two different ways to derive the Grashof number. […]

Can you choose to be drafted? No choice, much like no choice in what job they would give you – needs of the service. Likely to be the Army or Marines, who bear the brunt of casualties in war. Many folks voluntarily enlisted instead of being drafted, so they could pick their branch and (try […]

What are the types of simulation models? Simulation models can be generally classified into one of three major types, namely, continuous event simulation, discrete event simulation, and Monte Carlo simulation or Monte Carlo methods (MCM). What is model in simulation and modeling? In the computer application of modeling and simulation a computer is used to […]

Why is throttling valve not replaced by an isentropic turbine in the ideal Vapour compression refrigeration cycle? Why is the throttling value not replaced by an isentropic turbine in the ideal vapour compression refrigeration cycle? Because the feed is a liquid and the effluent is fairly low quality, the average specific volume of the working […]

Can I build house without pillar? It depends on span of your house slab. And without pillars means no open column , it has to be hide in wall. Generally 6–8 M span you can but more than that you have to make strong structure and spacial structure if you want. So,yes you can do […]

What is the name of piping system adopted in plumbing of drainage? Single Stack System This system of pipes carries waste water from the wash basin, bathrooms, sinks and the foul matters from the water closets. This is connected to a final single pipe. Is a drain from the two or three fixtures connected to […]

What does it mean when the temperature warning light comes on? When the coolant temperature warning light goes on, the engine is seriously overheated, which can be caused by overheating, lack of cooling water or a cooling system that is having trouble. At this point, you need to park your car in a safe area […]

What are the desirable properties of hydraulic fluid? Characteristics of a Good Hydraulic Fluid Viscosity. Viscosity is a measure of a hydraulic fluid’s resistance to flow. Compressibility. Compressibility is a measure of the amount of volume reduction due to pressure. Wear Resistance. Oxidation Stability. Thermal Stability. Filterability. Rust and Corrosion Protection. Foam Resistance. What is […]

What is the driving force for recrystallization? The main driving force for recrystallization to occur is the stored energy during straining in the form of crystalline defects. In a region exempt of defects, surrounded by high angle boundaries, recrystallization proceeds by growth of this “nucleus” over the yet non-recrystallized matrix. How does cold working affect […]

Which refrigerant is used in Vapour compression cycle? The most common include ammonia, Freon (and other chlorofluorocarbon refrigerants, aka CFCs), and HFC-134a (a non-toxic hydrofluorocarbon). The Vapor-Compression Refrigeration Cycle is comprised of four steps. The conceptual figure of the process shows the PV changes during each part. Which fluid can be used in Vapour refrigeration? […]