What is the function of a damper? A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate […]
How do I run a pig script in local mode?
How do I run a pig script in local mode? To run the Pig scripts in local mode, do the following: Move to the pigtmp directory. Execute the following command (using either script1-local. pig or script2-local. pig). Review the result files, located in the script1-local-results. txt directory. Which of the following will run pig in […]
What is the height of a wave called from trough to crest?
What is the height of a wave called from trough to crest? The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength. What is the height of the wave measured from the midline to the crest of the […]
How do I make a prototype for my product?
How do I make a prototype for my product? Here are four steps to get your first prototype built so you can turn your idea into a patented, profitable product. Create a Concept Sketch. The first step toward turning your idea into reality is getting it down on paper. Develop a Virtual Prototype. Build a […]
How does a DC to DC converter work?
How does a DC to DC converter work? DC-DC converters are high-frequency power conversion circuits that use high-frequency switching and inductors, transformers, and capacitors to smooth out switching noise into regulated DC voltages. Closed feedback loops maintain constant voltage output even when changing input voltages and output currents. How is chopper used in speed control […]
How big of an electric motor is needed to power a car?
How big of an electric motor is needed to power a car? There is a direct conversion between horsepower and watts: 745.7 watts is 1 horsepower. Car motors for modern vehicles range from about 50 horsepower to 500 horsepower or more. An average medium size family car might have a 150 HP motor. To duplicate […]
What level should my radon manometer read?
What level should my radon manometer read? The readout on the manometer should be between 0.5in – 1.75in. In most cases these are acceptable levels indicating, your system is operating correct. When your Radon system is shut off the fluid should rest at zero if it does not then your manometer is low on fluid. […]
What do you do if your gas pedal is jammed?
What metal is the least conductive?
What metal is the least conductive? mercury Which is more conductive steel or aluminum? Brass is only 28% as conductive as copper. Some bronzes are as low as 7% as conductive as copper! Copper is the standard by which electrical materials are rated and conductivity ratings are expressed as a relative measurement to copper….Electrical Conductivity […]
When a disconnecting means must be located within sight from a motor the disconnect must be visible and not more than ___ ft from the motor?
When a disconnecting means must be located within sight from a motor the disconnect must be visible and not more than ___ ft from the motor? 50 ft Can you lock a disconnect in the on position? Question: Can the disconnect switches be locked in the closed (on) position? Response: There is no provision in […]