Category: Engineering

What is the diameter of a cylinder? The diameter, or the distance across a cylinder that passes through the center of the cylinder is 2R (twice the radius). The surface area of an open ended cylinder (as shown) is 2 RL. What is called the internal diameter of the cylinder? The diameter of the piston, […]

What is Aashto method? The current AASHTO method is a regression method based on the results of road tests. The AASHTO method utilizes an index termed the “structural number” (SN) to indicate the required combined structural capacity of all pavement layers overlying the subgrade. How do you calculate structural number of pavements? The Structural Number […]

What is a subsea well? A Subsea well is a well in which all the production systems are located on the seabed. The facilities which are under water are basically referred to as ‘Subsea’. The prefix is used for wells, field, project and the development too. What is subsea in oil and gas industry? Oil […]

Which is the best shielding material for gamma radiation? Lead What is the thickness of gamma radiation? Photon energy (E = 1.3325 MeV), initial radiation intensity ( = 100 mSv/hr), material #1 (Pb), material #2 (Fe), material #1 thickness (21.0 cm), and material #2 thickness (2.0 cm) were imported as the input variables into MATLAB. […]

At what time of the day is the demand for electricity the highest and why is this? Most of this increase in demand has occurred during the peak periods. Peak periods are the times when the demand for electricity is high – usually when everyone is using a lot of electricity at the same time, […]

What does a pitot tube do on an airplane? Basically, a pitot tube is used in wind tunnel experiments and on airplanes to measure flow speed. It’s a slender tube that has two holes on it. The front hole is placed in the airstream to measure what’s called the stagnation pressure. How does a pitot […]

What is the function of a compressor in a vapor compression refrigeration system? It works as a pump to control the circulation of the refrigerant, and it adds pressure to the refrigerant, heating it up. The compressor also draws vapor away from the evaporator to maintain a lower pressure and lower temperature before sending it […]

Who may determine if an aircraft may be operated with inoperative equipment? Finally, a pilot, who is certificated and appropriately rated under 14 CFR part 61, or a person, who is certificated and appropriately rated to perform maintenance on the aircraft, must determine that the inoperative instrument or equipment does not constitute a hazard to […]

What is PWM voltage? PWM applies the power in digital pulses of regulated voltage. Even between the pulses, inertia keeps the motor and fan from stopping. As a result, most PCB designs that require some type of motor speed control use PWM. The PWM duty cycle refers to the “on” state versus the “off” state. […]

What is the formula for endpoint? ? The endpoint of a line segment going from A = (x₁, y₁) to a midpoint at M = (x, y) is the point B = (2x – x₁, 2y – y₁) . What is the length of a segment when the coordinates of its endpoints are (- 4 […]