Which of the following are pure substances?     A gold bar     The air around you     Water (H2O)     Aluminum foil     A bowl of cereal with milk     A brass urn

Other than wood nonferrous engineering materials can be divided into four categories they are polymers elastomers ceramics and glass and composites. True or false.

True or False 1. Inhalation is the most common way for a chemical to enter the body. 2. The first step of caring for a worker suffering from smoke inhalation is to provide the worker with 100% oxygen. 3. The employer is responsible for developing a written permit space program and ensuring its accessibility to relevant employees and contractors. 4. Even if a smoke inhalation victim is not negatively affected in the short term, symptoms can progress at a later date and lead to illness or even death. 5. According to OSHA, the permissible noise level for an eight hour period is 90 decibels. ******************************************************************************************** Multiple Choice 6. Good ventilation is a key component in controlling workers’ exposure to: A. Airborne pathogens B. Flammable Vapors C. Chemicals D. All answers are correct 7. Which of the following situations would not require a permit? A. Walls join inward B. Contains a hazardous atmosphere C. Limited…

choose the correct answer     The intensity of pressure at any point in a liquid at rest is the same in all directions.” The above statement is known as *       b. either of the above       c. Pascal’s law       a. Kirchhoff’s law       d. none of the above.

Figure 96°F Sunny A 1 of 1