Category: Engineering

How the piston moves from BDC to TDC? air enters the engine through the intake valve as the piston moves from TDc (top dead center) to BDc (bottom dead center). The exhaust valve then opens and the movement of the piston from BDc to TDc forces the exhaust gas out the valve. The exhaust valve […]

How do you calculate cost of excavation? Then the cost of 10m3 of excavation can be calculated as: No. of days required for 10m3 excavation = = 0.04125 days. How much does it cost to excavate for a house? In this regard, the Perrier guide gives us an estimate of the price: “It can cost […]

What is system call explain any five system calls which are used in Linux? Open() A program initializes access to a file in a file system using the open system call. Read() A program that needs to access data from a file stored in a file system uses the read system call. Write() What is […]

What is service entrance cable? The definition of service-entrance cable in 338.2 is “a single conductor or a multiconductor assembly provided with or without an overall covering, primarily used for services.” Type USE cable, containing two or more conductors, is permitted to have one conductor that is uninsulated. What are service entrance conductors protected against? […]

How do you calculate dry solids? Divide the mass of solids by the total mass of the solution, and then multiply the result by 100 to calculate the percentage of solids by weight. In this example, (17/167) * 100 = 10.18 percent. What is meant by volatile solids? Volatile solids are a substance that can […]

How do you calculate the transfer function of a DC motor? Transfer Function of Armature Controlled DC Motor Let Ra = Armature resistance, La = Armature inductance. Ia = Armature current. Va = Armature voltage. eb = Back emf. Kt = Torque constant. Kb= Back emf constant. What is field controlled DC motor? Field Controlled […]

What is the importance of electrical power? Electricity is also important for the purpose and operation of machines such as computers or monitors that display data to enhance medicine. Without electricity, hospitals and medicine would not be able to be advanced and cure illnesses, which would also result in more casualties. Why is electricity the […]

How do I calculate the flow rate of my air compressor? How Do You Calculate CFM for an Air Compressor? Next, convert to standard pressure (ATM). Tank Pump-up Time = 1 min 8.4 seconds (1.14 minutes) The three primary factors are: CFM = Tank Volume in Cubic Feet x Standard Pressure (ATM) During a Cycle […]

What does 65 mean on a tire? The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will […]

How does a transformer work? The core of the transformer works to direct the path of the magnetic field between the primary and secondary coils to prevent wasted energy. Once the magnetic field reaches the secondary coil, it forces the electrons within it to move, creating an electric current via electromotive force (EMF). What is […]