Test 4 Flashcards
(40 cards)
AN AIR GAP THAT IS CONSIDERED AFFECTED BY TWO INTERSECTING WALLS MUST ENCROACH UPON OR BE WITHIN A ZONE DEFINED AS _________ TIMES THE EFFECTIVE OPENING OF THE POTABLE WATER OULET IN WIDTH.
A. 1 1/2
B. 2
C. 3
D. 4
B. 2
WHICH OF THE FOLLOWING IS A MEANS OF CONTROLLING THERMAL EXPANSION?
A. T&P RELIEF VALVE
B. WATER HAMMER ARREXTOR
C. PRESSURE REFULATOR AFTER THE METER
D. THERMAL EXPANSION TANK
D. THERMAL EXPANSION TANK
WHAT IS THE MAXIMUM HEIGHT FOR A PERFECT VACUUM (AT SEA LEVEL) TO RAISE WATER IN A PIPE?
A. 21’
B. 26’
C. 30’
D. 33.9’
D. 33.9’
DURING NORMAL OPERATION THE RELIEF VALVE ON A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER REMAINS CLOSED DUE TO ____________.
A. SUPPLY SIDE PRESSURE
B. DIRECT CROSS-CONNECTION
C. ZONE PRESSURE
D. CHECK VALVE #1
A. SUPPLY SIDE PRESSURE
WHAT TYPE OF CROSS-CONNECTION IS A SUBMERGED HOSE BIBB (WITH NO HOSE ATTACHED)?
A. ACTUAL
B. POTENTIAL
C. PERMENANT
D. NONE OF THE ABOVE
A. ACTUAL
WHAT PROTECTS THE POTABLE WATER SUPPLY TO A URINAL EQUIPPED WITH FLUSHOMETER VALVE?
A. REDUCED PRESSURE PRINCIPLE BACKFLOW ASSEMBLY
B. DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY
C. ATMOSPHERIC TYPE VACUUM BREAKER
D. PRESSURE VACUUM BREAKER ASSEMBLY
C. ATMOSPHERIC TYPE VACUUM BREAKER
WHAT IS THE PURPOSE OF THE SPRING IN THE RELIEF VALVE ASSEMBLY OF A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER?
A. TO FORCE THE RELIEF VALVE OPEN
B. TO FORCE THE RELIEF VALVE CLOSED
C. TO FORCE THE RELIEF VALVE CLOSED
D. BOTH B & C
A. TO FORCE THE RELIEF VALVE OPEN
WHICH OF THE FOLLOWING IS USED TO CONTROL THERMAL EXPANSION PROBLEMS?
A. SOFT SEATING CHECK VALVES
B. PRESSURE RELIEF VALVES
C. EXPANSION TANK
D. BOTH B & C
D. BOTH B & C
WHAT IS THE SUGGESTED MINIMUM DISTANCE BETWEEN THE RELIEF VALVE DISCHARGE PORT OF A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER ASSEMBLY AND THE FLOOD LEVEL RIM OF THE SURROUNDING AREA?
A. 6”
B. 12”
C. 18”
D. 24”
B. 12”
DURING A FIELD TEST OF A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER YOU FIND A LEAKING #2 CHECK VALVE. AT THIS POINT YOU SHOULD MAKE REPAIRS TO THE ASSEMBLY AND?
A. RETEST #2 CHECK VALVE
B. RETEST THE ENTIRE ASSEMBLY
C. RETEST #1 CHECK VALVE
D. APPROVE THE ASSEMBLY AS IS
B. RETEST THE ENTIRE ASSEMBLY
WHAT IS THE REQUIRED TYPE OF PROTECTION BETWEEN A POTABLE WATER SYSTEM AND THE BUILDING SEWER SYSTEM?
A. DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY
B. PRESSURE VACUUM BREAKER ASSEMBLY
C. AIR GAP SEPARATION
D. BACKWATER VALVE
C. AIR GAP SEPARATION
WHAT IS THE MAXIMUM FLOW TEMPERATURE FOR THE HOSE BIBB VACUUM BREAKER?
A. 120 DEGREES
B. 140 DEGREES
C. 160 DEGREES
D. 180 DEGREES
D. 180 DEGREES
WHAT IS THE PURPOSE OF TESTING THE DIFFERENT PRESSURES ON A BACKFLOW ASSEMBLY?
A. TO CHECK THE SPRING TENSION
B. TO MAKE SURE THE CHECK IS SEATED
C. TO RECORD FOR THE TEST REPORT
D. ALL OF THE ABOVE
D. ALL OF THE ABOVE
WHAT IS THE MINIMAL ACCEPTABLE PRESSURE DIFFERENTIAL ACROSS THE CHECK VALVES WHEN TESTING A DOUBLE CHECK DETECTOR FIRE PROTECTION BACKFLOW PREVENTER ASSEMBLY?
A. 0.5 PSI
B. 1.0 PSI
C. 2.0 PSI
D. 3.0 PSI
B. 1.0 PSI
ASSE STANDARD 1037 (FLUSHOMETERS FOR PLUMBING FIXTURES) REQUIRES ___________.
A. ATMOSPHERIC VACUUM BREAKER
B. REDUCED PRESSURE PRINCIPLE ASSEMBLY
C. AIR GAP SEPARATION
D. DOUBLE CHECK VALVE ASSEMBLY
A. ATMOSPHERIC VACUUM BREAKER
WHEN TESTING A REDUCED PRESSURE PRINCIIPLE BACKFLOW PREVENTER _____________.
A. THE RPESSURE DROP ACROSS THE #1 CHECK VALVE MUST BE 1.0 PSID.
B. THE PRESSURE DIFFERENTIAL RELIEF VALVE IS HYDRAULICALLY DEPENDENT AND MECHANICALLY INDEPENDENT.
C. THE PRESSURE DROP ACROSS THE #2 CHECK VALVE MUST BE AT LEAST 5.0 PSID.
D. THE PRESSURE IN ZONE 2 (REDUCED PRESSURE ZONE) MUST EXCEED SUPPLY PRESSURE FOR THE RELIEF VALVE TO DISCHARGE.
B. THE PRESSURE DIFFERENTIAL RELIEF VALVE IS HYDRAULICALLY DEPENDENT AND MECHANICALLY INDEPENDENT.
WHAT WILL YOU WRITE ON YOUR TEST REPORT IF YOU FIND A PRESSURE VACUUM BREAKER ASSEMBLY INSTALLED ON A BOILER FEED LINE?
A. PRESSURE VACUUM BREAKER ASSEMBLY SHOULD NOT BE INSTALLED WHERE IT IS SUBJECT TO BACKPRESSURE.
B. REDUCED PRESSURE PRINCIIPLE ASSEMBLY SHOULD BE INSTALLED IN PLACE OF THE PVB.
C. DOUBLE CHECK BACKFLOW PREVEDNTION ASSEMBLY SHOOULD BE INSTALLED IN PLACE OF THE PVB.
D. BOTH A & B
D. BOTH A & B
WHICH TEST COCK MAY BE OPENED TO ESTABLISH FLOW THROUGH A BACKFLOW PREVENTION ASSEMBLY?
A. TEST COCK #1
B. TEST COCK #2
C. TEST COCK #3
D. TEST COCK #4
D. TEST COCK #4
WHICH OF THE FOLLOWING IS AN INCREASE OF PRESSURE IN A CLOSED SYSTEM DUE TO THE HEATING AND EXPANDING OF WATER?
A. RELIEF VALVE
B. BACKPRESSURE
C. THERMAL EXPANSION
D. BTU
C. THERMAL EXPANSION
A HOSE CONNECTION BACKFLOW PREVENTER IS HIGH HAZARD PROTECTION VALVE THAT CONTAINS TWO ____________.
A. CHECK VALVES
B. ISOLATION VALVES
C. VENT PORTS
D. INTERMEDIATE ZONE PRESSURE
C. VENT PORTS
WHEN INSTALLING A CROSS-CONNECTION COTROL DEVICE YOU SHOULD CONSIDER ____________.
A. SIDEWALL CLEARANCES
B. DEGREE OF HAZARD
C. THE DISTANCE BETWEEN THE BACKFLOW DEVICE AND THE FLOOR LEVEL.
D. ALL OF THE ABOVE
D. ALL OF THE ABOVE
A SUB-ATMOSPHERIC PRESSURE CAN ALSO BE REFERRED TO AS _______________.
A. PSID
B. PSIA
C. BACKPRESSURE
D. VACCUUM
D. VACCUUM
A CARBONATED BEVERAGE MACHINE REQUIRES A BACKFLOW PREVENTER FOR BEVERAGE DISPENSING EQUIPMENT. THIS PROTECTION IS NEEDED BECAUSE OF?
A. THE CARBON DIOXIDE GAS
B. THE INCREASED ACIDITY OF THE WATER
C. THE HIGHER PH LEVEL AFFECTING HTE COPPER PIPE
D. ALL OF THE ABOVE
A. THE CARBON DIOXIDE GAS
THRMAL EXPANSION ____________________.
A. IS THE PRESSURE INCREASE WHICH OCCURS IN A PIPING SYSTEM EVERY TIME A WATER HEATER COMES ON TO REPLACED HOT WATER THAT IS USED.
B. OCCURS IN ANY HOT WATER SYSTEM WHEN WATER IS HEATED OR RECOVERED DURING PERIODS OF NON-USE.
C. CAN CAUSE A DANGEROUS INCREASE IN PRESSURE.
D. ALL OF THE ABOVE
D. ALL OF THE ABOVE
