1. The pH scale ranges from
a. 1 to 12
b. 2 to 12
c. 0 to 14
d. 2 to 14

2. Fresh pH buffers should be poured
a. Daily
b. Weekly
c. Monthly
d. Per manufacturer’s specifications

3. How often should a pH meter be calibrated to ensure accuracy
a. Twice a day
b. Daily
c. Weekly
d. Monthly

4. What type of sample should be collected for pH testing?
a. A composite sample
b. A continuous sample
c. A grab sample
d. A regulated sample

5. A sample has a pH of 6.5 at 25o C. This sample is said to be
a. Acidic
b. Alkaline
c. Neutral
d. Basic

Answers:

1. C
2. A
3. B
4. C
5. A