Tools & Equipment Operation Flashcards

The ASSE 1012 standard governs which piece of equipment commonly used during backflow field testing?

Answer: Backflow preventer test kits (differential pressure gauges)

ASSE 1012 establishes performance requirements for backflow preventer field test kits, including accuracy and construction standards.

When attaching test kit hoses to test cocks on a DCVA, the tester should open the test cocks:

Answer: Slowly to allow gradual pressure equalization and protect the gauge

Slow, controlled opening of test cocks prevents water hammer and sudden pressure spikes that could damage the gauge or produce erroneous readings.

A tester's field test kit hoses develop small cracks near the fittings. The correct action is to:

Answer: Replace the hoses before performing any tests

Cracked hoses can leak under pressure, causing incorrect differential readings and a safety hazard; they must be replaced.

How frequently should a backflow tester's differential pressure gauge be calibrated according to standard practice?

Answer: At least annually, or whenever accuracy is suspect

Annual calibration (or more frequently if the gauge is dropped or suspected inaccurate) is the accepted minimum standard for test kit accuracy.

During a field test, a tester uses a stopwatch to time a relief valve opening event. This measurement is used to:

Answer: Determine the differential pressure at which the relief valve first opens (opening point)

Timing combined with controlled gauge manipulation helps the tester identify the exact differential at which the relief valve cracks open during an RPZ test.

A tester's gauge hose ends are fitted with 1/4-inch NPT fittings. When connecting to a test cock with a different thread type, the tester should:

Answer: Use a properly rated adapter fitting matched to both thread types

A rated adapter is the safe, code-compliant method to connect mismatched fittings without risking leaks or thread damage.

Which test cock position is used to isolate a hose from system pressure when reconfiguring the test kit between test steps?

Answer: Closed (handle perpendicular to pipe)

A closed test cock (handle perpendicular to the pipe) fully blocks flow so the hose can be safely moved or reconnected.