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10 Cards in this Set
- Front
- Back
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Supply is not a problem. Pressure at the cylinder is 60PSI. The CRV valve will not open. what is the likely cause?
a. Change lead washer b. air leak downstream from chlorinator c. rapid withdrawal d. empty cylinder |
b. air leak downstream from chlorinator
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Supply is not a problem. Pressure at the cylinder is 50 PSI. However chlorine will not reach maximum application point. what is the problem?
a. rapid withdrawal b. lead washer c. faulty injector d.manometer needs adjusting |
c. faulty injector
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Variable vacuum control, formerly working well , now will not go below 30% feed. Signal OK. What is the likely cause?
a. lead washer failure b. CPRV (chlorine pressure regulating valve) c. injector PSI 50 d. HOCL formed |
b. CPRV (chlorine pressure regulating valve)
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Chlorine will feed OK at maximum output, but will not control at low rates, What is the likely cause?
a. Vacuum regulating valve (CRV) b. lead washer failure c. rapid withdrawal d. air leak |
a. Vacuum regulating valve (CRV)
to fix : repair diaphragm or replace valve |
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Gas PSI at cylinder 90. PSI at CRV (Vacuum regulating valve) is 10. CPRV (chlorine pressure regulating valve) is OK. What is the problem?
a. Plugged restrictor/injector b. lead washer failure c. rapid withdrawal d. rotameter set at 400 |
a. Plugged restrictor/injector
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In June, the chlorine roof was leaking. A contract was issued and the roof was removed for repair. 2 hours later chlorine flow stopped. what is the likely cause?
a.leak downstream b. high PSI at injector c. reliquefaction d. chlorinator room warm |
c. reliquefaction
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It's January in northern state. The chlorine store room is heated. the chlorinator room is not heated. The chlorine line leaving the chlorinator room is underground. There is no chlorine flow. supply is not a problem. Gas PSI at cylinder is good. What is the likely cause?
a. condensation b. high PSI at cylinder c. high PSI at injector d. Chlorinator room warm |
a. condensation
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The operator takes the 24 hour scale reading. The usage does not agree with the rotameter setting for the past 24 hours. what is the likely cause?
a. Air leak downstream from chlorinator b. high cylinder pressure c. chlorinator room warm |
a. Air leak downstream from chlorinator
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The chief operator is training new employees on the plant's chlorination system. He notices a leak at the valve nut. What does he tell the trainees?
a. remove cylinder b. turn the valve not clockwise to tighten c. call Chemtrec d. put the tank cap back on |
b. turn the valve nut clockwise to tighten
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How do you repair a pinhole leak in a 2000lb chlorine cylinder
a. duct tape b. use repair kit clamp from B kit c. tighten clamp with turnbuckle d. B & C |
d. B & C
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