CWEA Lab Analyst Grade 1 Questions and
Answers | Study Guide | Grade A+
• Celcius -✓✓(F-32)5/9
• HPC media water bath -✓✓45`C, 3hr
• Precision -✓✓a measure of how close a series of measurements are to one
another
• Accuracy -✓✓how close a measurement is to the true value
• Electrical Fire -✓✓unplug & sodium bicarbonate
• analytical balance -✓✓a device for determining mass that gives highly accurate
measurements
• top loading balance -✓✓used to determine mass; not as precise as an analytical
balance
• triple beam balance -✓✓instrument used to measure mass, less sensitive than top
loading
• Coliform -✓✓Gram-negative rod-shaped bacteria normally present in the
intestine; includes E. coli and other species.
• temp and pH -✓✓temp rises, pH drops. Must measure pH within 15 min of
collecting sample
• Always add ___ to ___ -✓✓acid to water
• spectrometer -✓✓a device that spreads light into its different colors
• rounding off -✓✓.5=keep # even <.4 stays the same >.6 round up
• sig fig rules -✓✓Non-zero digits are always significant.
Answers | Study Guide | Grade A+
• Celcius -✓✓(F-32)5/9
• HPC media water bath -✓✓45`C, 3hr
• Precision -✓✓a measure of how close a series of measurements are to one
another
• Accuracy -✓✓how close a measurement is to the true value
• Electrical Fire -✓✓unplug & sodium bicarbonate
• analytical balance -✓✓a device for determining mass that gives highly accurate
measurements
• top loading balance -✓✓used to determine mass; not as precise as an analytical
balance
• triple beam balance -✓✓instrument used to measure mass, less sensitive than top
loading
• Coliform -✓✓Gram-negative rod-shaped bacteria normally present in the
intestine; includes E. coli and other species.
• temp and pH -✓✓temp rises, pH drops. Must measure pH within 15 min of
collecting sample
• Always add ___ to ___ -✓✓acid to water
• spectrometer -✓✓a device that spreads light into its different colors
• rounding off -✓✓.5=keep # even <.4 stays the same >.6 round up
• sig fig rules -✓✓Non-zero digits are always significant.
