Category: Engineering

What section of SDS has exposure limits? Section 8—Exposure controls/Personal protection: OSHA’s permissible exposure limits (PELs), threshold limit values (TLVs), appropriate engineering controls, and personal protective equipment (PPE). What information does a safety data sheet SDS contain? The SDS includes information such as the properties of each chemical; the physical, health, and environmental health hazards; […]

What do you mean by heat engine heat pump and refrigerator? A refrigerator is a reversed heat engine, where heat is pumped from a body at low temperature to a body at high temperature. Any refrigerating system is a heat pump, which extracts heat from a cold body and delivers it to a hot body. […]

What kind of volcano usually forms over a hot spot? shield volcanoes What type of volcano is a cinder cone? Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks […]

What is the external opportunity cost of a successful biking company in a community? Answer: The cost of increased rates of accidents/injuries due to road accidents associated with cycling. Explanation: Opportunity cost is referred to as an alternative cost which is the value of the other choose left out while settling for a better alternative. […]

What is the weight density of a 2.24 inch diameter titanium sphere that weighs 0.82 lb? What is the density of a 2.24 in. diameter sphere of titanium that weighs 0.82 lb?… Material Mass Density (g/cm3) Weight Density (lb/in.3) Water (Pure) 1.00 0.036 Water (Sea) 1.03 0.037 Ice 0.92 0.034 Concrete 2.40 0.087 How do […]

How do you solve support reactions? How to Calculate Reactions at Supports? Calculating the Reactions at the Supports of a Beam. Let the sum of moments about a reaction point equal to ZERO (ΣM = 0) Let the sum of vertical forces equal to 0 (ΣFy = 0) How do you know if a joint […]

What is the current through the 3.0 Ω resistor? The current through the 3.0 Ω resistor is 2.0 A. How do you find the voltage drop across 3 resistors? Ohm’s Law states that V=I*R, where V is voltage, I is current and R is resistance. In a series circuit, the voltage drop across each resistor […]

What is surface treatment of metals? Metal surface treatment is a process where metal parts are prepared for painting. The preparation is commonly referred to as coatings pretreatment. This usually involves creating a physical barrier that will protect metal against a corrosive environment. What is surfacing in welding? A weld applied to a surface, as […]

What is the diameter of the fire hose nozzle? 1.125 in What size are fire hoses? There are three standard-sized hoselines that the fire service uses as a front line attack line: 1½, 1¾ and 2½ inch. The remaining situations might involve large master streams or deck guns. The key with selecting the correct size […]

How does steam turn a turbine? As the name implies, a steam turbine is powered by steam. As hot, gaseous steam flows past the turbine’ spinning blades, steam expands and cools, giving off most of the energy it contains. This steam spins the blades continuously. The blades thus convert most of the steam’s potential energy […]