When the angle between surface tension with the liquid θ is greater than 90 degree the liquid becomes? If θ is obtuse, i.e; θ >90°, then liquid meniscus will be convex upwards. If angle of contact is acute angle, i.e; θ <90°, then liquid will wet the surface. When there is a capillary depression What […]
How do you test a 3 phase motor with a Megger?
How do you test a 3 phase motor with a Megger? Turn off the power supply to the motor, usually accomplished by switching the circuit breaker. Place one megger probe to the any mounting bolt on the breaker box to test for grounding continuity, then touch the other probe to a motor terminal. Crank the […]
How do you find the critical buckling load?
What is calibration error?
What is calibration error? The difference between values indicated by an instrument and those that are actual. Normally, a correction card is placed next to the instrument indicating the instrument error. Also called calibration error. What are the four types of errors? Errors are normally classified in three categories: systematic errors, random errors, and blunders. […]
What is external forced convection how does it differ from internal forced convection can a heat transfer system involve both internal and external convection at the same time give an example?
What is external forced convection how does it differ from internal forced convection can a heat transfer system involve both internal and external convection at the same time give an example? If the fluid is forced to flow over a surface, it is called external forced convection. If it is forced to flow in a […]
When your car travels rapidly over a bump in the road you suddenly feel weightless explain?
When your car travels rapidly over a bump in the road you suddenly feel weightless explain? When your car travels rapidly over a bump in the road, you suddenly feel weightless. Explain. You lose contact with your seat, so your apparent weight becomes zero. Astronauts learn to tolerate weightlessness by riding in an airplane (nicknamed […]
What is the total resistance of two resistors in parallel?
What is the purpose of circuit analysis?
What is the purpose of circuit analysis? The general strategy of circuit analysis is to create and solve a system of independent equations. Written by Willy McAllister. Circuit analysis, or solving a circuit, means figuring out voltages and currents in each element. Which basic laws should be followed to Analyse the circuit? What is the […]
What is a one way flow control valve?
What is a one way flow control valve? Flow control or one-way flow control valves regulate the piston speed of pneumatic drives during advance and return strokes. This is done through suitable restriction of the flow rate of compressed air in exhaust air or supply air direction. The flow control function creates an adjustable annular […]
How does a cascade system work?
How does a cascade system work? Cascade Systems A cascade system uses one refrigerant to condense the other primary refrigerant that is operating at the desired evaporator temperature. This approach is usually used for temperature levels less than −80°F, when light hydrocarbon gases or other low boiling gases and vapors are being cooled. Why do […]