What kind of piping is used in an ammonia refrigeration system? Steel piping What is refrigeration copper tubing? Copper, used for refrigeration, is designated as ACR copper. Measure the inside and outside diameter of the end of the tube. The outside diameter of Type L is always 1/8-inch larger than the size marked on the […]
What is the input impedance of a common emitter amplifier?
What is the input impedance of a common emitter amplifier? around 1kΩ How do you test for impedance? To find the output impedance the output voltage is measured first with no load resistor, then with a fixed load (purely resistive). To measure the input impedance over a complete spectrum of frequencies, use the following circuit: […]
What is essential body fat?
What is essential body fat? Essential fat is the minimal amount of fat necessary for normal physiological function. For males and females, essential fat values are typically considered to be 3% and 12%, respectively. Fat above the minimal amount is referred to as nonessential fat. What is the function of essential body fat? Essential fat […]
How many types of N95 masks are there?
How many types of N95 masks are there? The N95 respirator is the most common of the seven types of particulate filtering facepiece respirators. This product filters at least 95% of airborne particles but is not resistant to oil. This web page provides a table of NIOSH-approved N95 respirators, listed alphabetically by manufacturer. What are […]
What type of current is used in arc welding?
What type of current is used in arc welding? Both direct current (D.C.) and alternating current (A.C.) are used for arc welding. The alternating current for arc is obtained from a step down transformer. The transformer receives current from the main supply at 220 to 440 volts and step down to required voltage i.e., 80 […]
How do you find the maximum theoretical efficiency?
How do you find the maximum theoretical efficiency? The maximum theoretical efficiency of a heat engine (which no engine ever attains) is equal to the temperature difference between the hot and cold ends divided by the temperature at the hot end, each expressed in absolute temperature (Kelvin). What is the theoretical maximum efficiency? The Carnot […]
Which of the following is suitable for job shop production?
Which of the following is suitable for job shop production? General purpose machines are suitable in job shops because they are capable of performing many different types of operations and thus capable of producing a wide variety of products with small lot sizes. Machines which perform similar function grouped together. What is meant by job […]
Why is organic farming better?
Why is organic farming better? Organic farming tends to be better for the environment. Organic farming practices may reduce pollution, conserve water, reduce soil erosion, increase soil fertility, and use less energy. Farming without synthetic pesticides is also better for nearby birds and animals as well as people who live close to farms. Are organic […]
How is metabolism important in nutrition processes?
How is metabolism important in nutrition processes? Nutrition is the key to metabolism. The pathways of metabolism rely upon nutrients that they breakdown in order to produce energy. This energy in turn is required by the body to synthesize molecules like new proteins and nucleic acids (DNA, RNA). How is metabolism regulated in the body? […]
How many rotations and color changes are needed to perform per insertion deletion in a red black tree?
How many rotations and color changes are needed to perform per insertion deletion in a red black tree? Solution: True, at most two rotations are performed. (b) Is it true that in the worst case a red-black tree deletion requires O(1) node recolorings? When a node is first inserted in a red black tree it […]