Certification Quiz: 1. To be most representative, a 24-hour composite sample should be collected in: a. Equal volumes every 15 minutes b. Equal volumes every 12 hours c. Flow-proportioned volumes every hour d. Flow-proportioned volumes every 4 hours 2. Grab samples are considered to be representative of the: a. Average daily conditions in the system b. Average daily conditions at the sample location c. System conditions for 2 hours before and after the sample taken d. System conditions at the time the sample was taken 3. Which of the following are functions of flexible couplings used to connect motor and pump shafts? a. To absorb shock loads and pulsations b. To avoid wear on bearings caused by large shaft misalignments c. To transmit power efficiently and effectively from one shaft to the other d. All of the above 4. Which of the following will be affected by the loss of seal water pumps? a. All process pumps with mechanical seals b. All process pumps with water seals c. Anaerobic digester water seal d. Bar screen, grit dragout, grit collector, and induced draft fans 5. Centrifugal pumps are classified according to the: a. Direction of liquid flow through the pump impeller b. Type of power source used to drive the pump c. Type of liquid being pumped d. All of the above 6. Leakage from a packing gland should be approximately; a. None b. One drop per second c. One drop per minute d. Thirty drops per hour 7. If a centrifugal pump has been running quietly and cavitation starts suddenly, this usually indicates: a. Clogged or worn impeller b. Blown fuse c. Higher than normal voltage d. None of the above 8. What information must be on a warning tag attached to a switch that has been locked out? a. Directions for removing tag b. Name of nearest physician to call in case of emergency c. Signature of person who locked out switch and who is the only person to remove tag d. Time to unlock switch Answers: 1-c 2-d 3-d 4-b 5-a 6-b 7-a 8-c
Posted on: Tue, 10 Sep 2013 06:38:23 +0000
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