• Do not reenergize a circuit breaker until sure that the cause of the short circuit has been corrected. 2 Liquefied Gases and Cryogenic Liquids. Make safety showers available in areas where chemicals are handled; make sure they meet all installation and maintenance requirements (ANSI Z358. • Keep the injured person warm. If solvents or corrosive substances are inadvertently drawn into the pump, change the oil before any further use. Provide an MSDS for each chemical that is involved in the incident to the attending physician or emergency responders. Model 2 scenes in the lab answers. Improper loading and balancing can cause the rotors to dislodge while spinning. • If possible, determine the identity of the chemical and inform the emergency medical personnel attending the injured person. Lifting injuries are one of the more common types of injuries for trained laboratory personnel. Because laboratory operations may generate heat or vapors, the type and location of the detectors must be carefully evaluated to avoid frequent false alarms.
Therefore, conduct pressure and vacuum operations in glass vessels behind adequate shielding. Because of the potential risks involved in using water around chemicals, laboratory personnel should not use fire hoses except in extreme emergencies. "You certainly don't have to be a scientist to play a part in life-changing scientific research. However, temperature controllers with built-in safety interlock capability are available from commercial sources and are preferred to variable autotransformers. Stills in use should be attended at all times and should have an automatic high-temperature shutoff. The input connection for this heating element is a male plug that fits a female receptacle from a variable autotransformer (e. g., Variac) output line. Safety first model 2 scenes in the lab answers. Their use in filtration or solvent-removal operations involving volatile organic solvents presents a hazard that volatile chemicals will contaminate the wastewater and the sewer, even if traps are in place. These procedures are intended to limit injuries and minimize damage if an accident should occur.
147, Lock out/Tag out) applies. 5 Plastic Equipment. • Warn personnel in adjacent areas of any potential risks to their safety. As well as culturing cells and retrieving them from liquid nitrogen, she needs to observe correct laboratory procedure at all times in her role. Model 2 scenes in the lab answer. Only use materials that are appropriately rated or recommended for that particular service. Do not use an adapter or cross-thread a valve fitting.
Although inert gases are not exposure hazards, they can produce conditions of oxygen depletion that could lead to asphyxiation. Gases will vaporize, producing a pressure buildup and the potential for explosion. Spills of this mixture are very slippery and must be cleaned thoroughly to prevent slips and falls. Transfer very slowly to minimize boiling and splashing. Notify the teacherWhat shouldn't you do if a mercury thermometer is broken?
Stuffing boxes and gland joints are a likely source of trouble in pressure installations. Oil baths must be well mixed to ensure that there are no hot spots around the elements that take the surrounding oil to unacceptable temperatures. Use a standard three-conductor extension cord of sufficient rating for the connected equipment with an independent ground connection. In many localities conserving water is essential and makes tap water inappropriate. The use of water as a coolant in laboratory condensers and other equipment is common practice. On many brands of combined stirrer/hot plates, the controls for the stirrer and temperature control are not easily differentiated. Respirators must fit snugly on the face to be effective. These respirators function by trapping vapors and gases in a cartridge or canister that contains a sorbent material, with activated charcoal being the most common adsorbent. The use of high-intensity ultrasound in the chemical laboratory has grown substantially during the past decade. Do not transfer liquefied gases from one container to another for the first time without the direct supervision and instruction of someone who is experienced in this operation. What will happen to Ray and Tim when the teacher catches them? Ground all electrical equipment unless it is double-insulated.
Run reactions under pressure in metal equipment, not glass, if at all possible. Shield them, either by a layer of fiber-reinforced friction tape or by enclosure in a wooden or. Even with the use of a trap, the oil in a mechanical vacuum trap can become contaminated and the waste oil must be treated as a hazardous waste. Extra precautions are particularly important for instruments that incorporate high-voltage circuitry. Good practice provides compressed gas cylinders with tags on which the names of users and dates of use can be entered. The proper choice and use of a pressure gauge involve several factors, including the flammability, compressibility, corrosivity, toxicity, temperature, and pressure range of the fluid with which it is to be used. Do not use streams of water against fires that involve oils or other water-insoluble flammable liquids (Class B fires). X-rays and electron beams (E-beams) are used in a variety of laboratory applications but most often for analytical operations. Under most circumstances, any repairs to, adjustments to, or alterations of electrical instruments should be made only by a qualified individual.
Electronic monitors and alarms are available to prevent hazards due to asphyxiant, flammable, and many toxic gases. A laboratory specializing in the analysis of paint samples was asked to analyze pigmented polypropylene. Over a year, the team cleans around 750 000 flasks, test tubes and beakers. Use an explosion shield and a full-face shield to protect laboratory personnel, and carry the procedure out in a laboratory chemical hood. Use a diaphragm gauge with corrosive gases or liquids or with viscous fluids that would destroy a steel or bronze Bourdon tube. 1 Representative design for a three-wire grounded outlet. What is Betty doing wrong? Those that are not should have a spindle key on the valve spindle or stem while the cylinder is in service. Y/NNNever use ch---ed, cr---ed, or d---y ipped, cracked, dirtyAssume glassware is washed before you use it because the person who used it before you washed it for sure. This paper is not a complete listing of the safety hazards in the laboratory but rather it plays the role of alerting students/ scholars to the possible safety hazards in the laboratory.
Thus, you must always l-------e glassware before putting it in the stopper. Other types of respirators are available for emergency or rescue work in hazardous atmospheres from which the wearer needs protection. Cell services team member Fatemeh Abolverdi arrived at her post as a laboratory research apprentice after studying science at school, followed by a college diploma in applied science. 4 Miscellaneous Physical Hazards Presented by Electrically Powered Equipment. SCBA is the only type of respiratory protective equipment suitable for emergency or rescue work. • Use full-face shields with throat protection and safety glasses with side shields when handling explosive or highly hazardous chemicals. 4 Rotary Evaporators. Only leak-test solutions Specifically designed for oxygen compatibility may be used to test for oxygen leaks; do not use soap solutions because they may contain oils that can react violently with the oxygen. This preview shows page 5 - 7 out of 8 pages. 4 Stirring and Mixing Devices. Dust, fumes, and mist respirators are used only for protection against particular, or certain classes of, dusts, fumes, and mists as specified by the manufacturer. If equipment does not contain its own built-in overload protection, modify it to provide such protection or replace it with equipment that does. This requirement also applies to oil-free Teflon-lined diaphragm pumps. All new electrical equipment should be inspected on receipt for a certification mark.
Many of the accidents that occur in the laboratory can be attributed to improper use or maintenance of laboratory equipment. Wear proper protective gloves when handling a hot bath. Materials that are pliable under normal conditions can become brittle at low temperatures. Appropriate cutting techniques and the use of the proper or specialized tools should also be considered. Extinguish clothing fires by immediately dropping to the floor and rolling; however, if a safety shower is nearby, use it to extinguish a clothing fire (as noted in section 7. Heating baths associated with these devices (e. g., baths for rotary evaporators) should also be spark-free and controllable from outside the hood. Scissors in socket, makeup, chips. This plug combination provides a mechanically and electrically secure connection. Heating mantles are commonly used to heat round-bottom flasks, reaction kettles, and related reaction vessels. Valheim Genshin Impact Minecraft Pokimane Halo Infinite Call of Duty: Warzone Path of Exile Hollow Knight: Silksong Escape from Tarkov Watch Dogs: Legion. Every extinguisher should carry a label indicating what class or classes of fires it is effective against and the date it was last inspected. T/FFWhen should you report damaged electrical equipment?
Information regarding the vessel's history should include temperature extremes it has experienced, any modifications and repairs made to the original vessel, and all inspections or test actions it has undergone. For more information, see Chapter 6, section 6. Wear dry gloves when handling dry ice. Oil contaminated with solvents, mercury, and corrosive substances must be handled as hazardous waste. ) Mount pressure gauges so that they are easily read during operation. ImmediatelyWhat should you yell out if you or your lab partner is hurt? Injuries can result from bodily contact with rotating or moving objects, including mechanical equipment, parts, and devices. At least twiceNever return unused chemicals to their original containers.
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