True or False: OSHA has been a government agency for safety since 1865 , after the civil war. True False QUESTION 11 Which of the following is not true of a lost time accident? A. The employee only requires minor first aid B. The employer loses money due to retraining, loss production and reporting c. The employer must care for the injured employee D. The injured employee is not able to return to work QUESTION 12 The most common type of PPE found in manufacturing and metal related operations is: A. Gloves B. Hard hats C. Safety glasses D. Ear muffs QUESTION 13 True or false: An ion can either have a positive or negative charge but cannot have a neutral charge. True False QUESTION 14 What type of crystal structure does iron have a room temperature? A. Face centered cubic B. Body centered cubic C. Body centered tetragonal D. Face centered cubic What causes the space lattice to form from the unit cells in creating a grain? A. lonic bond B. Covalent bond C. Van der Waals bond D. Metallic bond QUESTION 16 Two or more elements that are joined chemically to form a unique substance is called a( n) A. Atom B. Diffusion C. Mixture D. Compound QUESTION 17 A combination of two or more substances that remain unchanged and are joined physically and not chemically, is called a A. Mixture B. Compound c. Element D. Molecule QUESTION 18 Pearlite is a phase of iron and carbon that consists of and A. Austenite, martensite B. Martensite, cementite C. Ferrite, cementite D. copper, tin True or False: Dendrites from molten steel grow from the inside to the outside as the steel cools. True False QUESTION 20 From Figure 5-18 in the text, what material has the least amount of thermal expansion? A. Aluminum B. Titanium - Yellow brass 2. Zine QUESTION 21 In an edge dislocation, the half plane will become a and the adjacent plane will become a as shown in Figure 5-11. A. Quarter plane, quarter plane B. Half plane, half plane C. Full plane, three quarter plane D. Full plane, half plane QUESTION 22 True False QUESTION 23 Reference the recrystallization temperature for copper. What is the temperature in F degrees? A. 2192 1.392 c. 1500 D. 842 QUESTION 24 As dislocation tangles develop and dislocations pile up against other phase particles, the of the metal increases and the decreases. A. Ductility, stength B. Elastic limit, shock strength C. Melting temperature, strength D. Strength, ductility