Why is a recovery period between bouts of exercise important? Active recovery prevents postexercise syncope by enhancing venous return in augmenting cardiac preload through rhythmic contractions of skeletal muscle (i.e., the muscle pump). This may be the best justification for performing a cool-down after intense exercise. Which principle of exercise is concerned with maintaining a […]
What is the stoichiometric air/fuel ratio?
What is the stoichiometric air/fuel ratio? about 14.7:1 How is stoichiometric air fuel ratio calculated? Stoichiometric air means the minimum air in stoichiometric mixture. The stoichiometric air/fuel ratio (AFR) can be calculated from the reaction equation (g/g). For gas AFR is usually determined in m3/m3. The actual combustion air depends also on the assumed air […]
What causes vortex shedding?
What causes vortex shedding? Vortex shedding happens when wind hits a structure, causing alternating vorticies to form at a certain frequency. This in turn causes the system to excite and produce a vibrational load. How do I stop my vortex from shedding? ABSTRACT: Vortex shedding of circular cylinders in uniform cross flow may be prevented […]
How is drill pipe displacement calculated?
How is drill pipe displacement calculated? Open-Ended Drill Pipe Displacement Displacement = Cross-sectional Area × Length. Sample Problem. Solution: OD = 3 in. = OD Area = 0.7854 × 0.25 ft × 0.25 ft = 0.0491 ft^2. How do you calculate tubing capacity? The formula for the volume of cylinder is: cylinder volume = π […]
What are the 3 factors that affect your vehicle in a curve?
What are the 3 factors that affect your vehicle in a curve? PLAY Speed. Load of car. Sharpness of curve. Sharpness of band (steep) What three factors can affect force of impact? Speed, weight, and time between impact and stopping all affect force of impact. A driver has control over the speed. Which of the […]
What does every object at a temperature above absolute zero?
What does every object at a temperature above absolute zero? Every object at a temperature above absolute zero (OK) emits thermal radiation due to kinetic energy of molecules within the object. (2-1)) if the object is a perfect emitter and absorber, i.e., a blackbody. How many times as much thermal radiation does it emit at […]
What is a vernier caliper used for?
What is a vernier caliper used for? The vernier calipers found in the laboratory incorporates a main scale and a sliding vernier scale which allows readings to the nearest 0.02 mm. This instrument may be used to measure outer dimensions of objects (using the main jaws), inside dimensions (using the smaller jaws at the top), […]
How do you find the axial load of a bearing?
How do you find the axial load of a bearing? The maximum axial load of any locking mechanism is always > 0.25 C0. Use SKF Bearing Select….Symbols. C basic dynamic load rating [kN] (product table) P0 equivalent static bearing load [kN] X radial load factor (table 1) Y axial load factor (table 1) How do […]
What is cellular manufacturing system?
What is cellular manufacturing system? Cellular manufacturing involves the use of multiple “cells” in an assembly line fashion. Each of these cells is composed of one or multiple different machines which accomplish a certain task. The product moves from one cell to the next, each station completing part of the manufacturing process. What do you […]
How does an air preheater work?
How does an air preheater work? Air Preheaters have a shell and tube type construction where exhaust heat from the flue gases is transferred to the air when they come in indirect contact with each other. Air Preheaters consist of a shell where tubes are arranged in a square or triangular pitch and are welded […]