What are the most common causes of acute ocular burns?4 answersThe most common causes of acute ocular burns include alkali and acid substances. Alkali burns accounted for approximately 49% of cases, while acid burns accounted for around 35.5% of cases. Other causative agents mentioned in the abstracts include edible lime (chuna), superglue, firecrackers, insecticides, lye, toilet cleaner, and battery acid. It is important to note that the percentages of causative agents may vary slightly between the studies.
What are the different types of damage that can occur to brazed joints?4 answersDifferent types of damage that can occur to brazed joints include thermal fatigue damage, interfacial intermetallic compound (IMC) and fusion zone (FZ) damage, water leaking and corrosion damage, and fatigue fracture damage. Thermal fatigue damage is caused by cyclic temperature changes and can lead to the development of cracks in the material. IMC and FZ damage occur in aluminium/steel CMT-welded joints and can weaken the joint. Water leaking and corrosion damage can cause failure in heat exchangers and is caused by interfacial and crevice corrosion. Fatigue fracture damage occurs in aluminum/stainless steel-brazed joints and is influenced by the intermetallic layers in the joint.
What are the injuries that a techilnician might getwhen soldering in electronics?5 answersSoldering in electronics can lead to various injuries for technicians. The use of soldering flux in the electronics industry can cause both irritant and allergic contact dermatitis, with irritant dermatitis being more common than allergic contact dermatitis. Additionally, the increasing trend of miniaturization in electronic packaging has led to the use of low melting point solder joints, which are susceptible to high current density induced damages such as electromigration, thermomigration, and enhanced intermetallic compound growth. Furthermore, the mechanical behavior of solder is non-linear and temperature dependent, and changes in the microstructure of solders can significantly affect their mechanical properties, leading to fatigue-driven multiple cracking and brittle fracture at the interface to metallization. Therefore, technicians soldering in electronics should be aware of these potential injuries and take appropriate preventive measures.
What are the most common causes of burnout?5 answersThe most common causes of burnout include setting hard-to-achieve goals or unrealistic deadlines, trying to meet other people's expectations, perceived unfair reward and treatment, ambiguity, insecure job, workload, work-family conflict, delivering adverse news, increased workload, influence of social values, pressure of employment situation, strict entry and wide exit of schools, education and teaching management system, influence of teachers' quality, personality factors, the gap between ideal and reality, professional interests, and demographic factors.
What can cause a transistor to burn?8 answers
What is the greatest risk factor for burnout?10 answers