老友网a) Material Safety and Data Sheets(正确答案)
b) Material Security and Data Sheets
c) Material Safety and Density Sheets
d) Maternal Safety and Dada Sheets
130.Material to be disposed of in the laboratory
a) must always be neutralized first(正确答案)
b) must always be handled in accordance with safety guidelines specific to that class of compound
c) must always be diluted copiously with water first
131. Examples of personal protective equipment do NOT include:
a) long-sleeve shirts
b) goggles and long pants
c) contact lenses
d) lab coats
e) all of the above(正确答案)
132.Regular inspection of safety equipment such as eye washes and safety showers must be carried out
a) once a month(正确答案)
b) four times a year
c) every week
d) yearly
133.Safety in the instructional laboratory is
a) the responsibility of the student only(正确答案)
b) the responsibility of the professor only
c) a shared responsibility
134. Four fundamental principles underlie all of the work practices in the chemical laboratory.Which of the following is not one of those principles?
a) minimize chemical exposure
b) do not underestimate risks
c) add ventilation to the lab by opening windows
d) plan ahead
e) be prepared for accidents(正确答案)
135. Compound A has a boiling point of 200℃, while compound B has a boiling point of 100 ℃.Which is more of a safety concern?
a) because it might burn faster(正确答案)
b) because it has a higher vapor pressure
c) just knowing the boiling point is not enough to decide the answer to this question
136. Why does extraction pose a potential safety problem?
a) the equipment becomes pressurized and often explodes(正确答案)
b) hazardous organic solvents are always necessary
c) the equipment becomes pressurized and may suddenly pop open if not handled properly, spraying hazardous chemicals into the air
137. When must you wear chemical splash goggles?
a.When working with non-hazardous chemical buffers.(正确答案)
b.When working with corrosive acids, poison or other hazardous material.
c.When working with compressed gas.
d.When outside the “splash zone” of hazardous chemicals.