Category: Engineering

What causes low pressure in HVAC? The two most common causes of low head pressure at an air conditioner or heat pump compressor motor are: Refrigerant under-charge, due to a refrigerant leak or improper charge. TXV (TEV) malfunction, over-metering refrigerant. What is a low pressure HVAC system? The low pressure switch monitors the refrigeration system […]

How do construction sites store materials? Storage at height – if materials are stored at height eg on top of a container, make sure necessary guard rails are in place if people could fall when stacking or collecting materials or equipment; Tidyness – keep all storage areas tidy, whether in the main compound or on […]

What is the difference between macronutrients and micronutrients? Macronutrients are big picture nutrition categories, such as carbohydrates, fats, and proteins. Micronutrients are smaller nutritional categories, such as individual vitamins and minerals like calcium, zinc, and vitamin B-6. You may have heard the phrase “counting macros” at some point. What is the importance of macronutrients and […]

How do welds fail? Insufficient weld size — because of design errors or incorrect interpretation of the part design – can lead to weld failures. A weld that is too small or too short for the application can fail from tension, compression, bending or torsional loads. What are common welding defects? So below we’ll learn […]

How do you find the frequency response of an LTI system? −jΩm = C(Ω) − jS(Ω) = H(Ω) . , where H(Ω) is the frequency response of the LTI system. The system therefore produces an output signal that is the “3-point weighted moving average” of the input. What is the frequency response of the system […]

How do you calculate the atomic packing factor for the FCC? Calculating the atomic packing factor for a crystal is simple: for some repeating volume, calculate the volume of the atoms inside and divide by the total volume. Usually, this “repeating volume” is just the volume of the unit cell. The unit cell is defined […]

What is the importance of sketching? Sketches help to convey ideas, demonstrate functionality, visualize user flow, and illustrate anything that requires human interaction. What is the most important role in free hand drawing? The line is the most important part of free hand drawing as sketching is done by different lines. Straight lines can be […]

Why is my laser printer printing lines? Streaking is usually caused by a worn out drum unit or spent toner cartridge. Drum units are a consumable and only need to be replaced after the use of 3 or 4 toners. Not all printers use a separate toner and drum unit. When you print from your […]

Is the equivalent resistance of a parallel circuit greater than or less than any individual resistor? Connecting elements in series forces all current to pass through each element. Connecting elements in parallel permits current to pass through only one element. The equivalent resistance is larger than each individual resistance. The equivalent resistance is smaller than […]

What is the function of controller in closed loop system? In a closed-loop system, a controller is used to compare the output of a system with the required condition and convert the error into a control action designed to reduce the error and bring the output of the system back to the desired response. What […]