Cross Connection Control - Test an RP

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Answer questions related to the test procedures for an RP

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Andrea Durdle

Canadá

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Cross Connection Control - Test an RP


Cross Connection Control - Test an RPVersión en línea Answer questions related to the test procedures for an RP por Andrea Durdle 1 What could happen if test cock 4 is not opened and flowing while flushing the RP? a The relief valve could discharge b The check valves may not seat c The other test cocks will not be able to be flushed d The upstream pressure will not drop enough 2 Why is it important to open test valve 3 and begin flushing the low side hose prior to the high side hose? a To ensure the relief valve opens and closes during flushing b To ensure the relief valve stays closed by maintaining the pressure differential while flushing c To test the opening point of the relief valve d To reduce the buffer 3 Why do we record the apparent pressure drop? a Because it indicates the opening point of the relief valve b It is the actual pressure drop across check valve 1 c To have a baseline pressure to reestablish the differential pressure across check valve 1 to d To calculate the buffer later on 4 What holds the relief valve closed under normal operating conditions? a Upstream supply pressure b Downstream supply pressure c The spring d Atmospheric pressure 5 Where is the higher pressure water coming from that is applying backpressure to check valve number 2? a The low side hose on TC 3 b The buffer tank in the gauge c The high side hose on TC 2 d Back pressure is created by downstream fixtures 6 Why do we bleed the low side again when testing check valve 1 in direction of flow? a To open CV 1 and release any disc compression from the previous test b To purge air from the low side c To release CV 2 d To establish flow through the relief valve 7 What is the purpose of the buffer? a To ensure the relief valve opens quickly b To provide a tolerance of error for the check valves c To predict the opening point of the relief valve d To prevent nuisance spitting of the relief valve 8 Why is the line pressure taken from test valve 1? a Because we don't want it to feel left out b Because it is upstream of check valve one so there will be no pressure drop c It doesn't actually matter which test cock line pressure is measured at d Because it has a larger opening on the test cock providing more flow to the gauge Explanation 1 By opening test cock 4 first and allowing flow, we keep the zone of reduced pressure lower even when flushing test cock two so the relief valve does not discharge. 2 Flushing the low side first and while the high side is flushed helps to maintain the differential and ensure the relief valve doesn't open before the test.

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Cross Connection Control - Test an RP

Video Quiz

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Creada por

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Cross Connection Control - Test an RPVersión en línea

por Andrea Durdle

What could happen if test cock 4 is not opened and flowing while flushing the RP?

Why is it important to open test valve 3 and begin flushing the low side hose prior to the high side hose?

Why do we record the apparent pressure drop?

What holds the relief valve closed under normal operating conditions?

Where is the higher pressure water coming from that is applying backpressure to check valve number 2?

Why do we bleed the low side again when testing check valve 1 in direction of flow?

What is the purpose of the buffer?

Why is the line pressure taken from test valve 1?

Explanation