BACKFLOW PREVENTION questions with accurate
answers
A backflow preventer may not be located in an area containing:
Ans✓✓✓ Toxic Fumes
A barometric loop protects the potable water supply from: Ans✓✓✓
Backsiphonage
A characteristic of the SVB operation is that the air inlet must seal
before the: Ans✓✓✓ Check valve opens.
A check valve closing differential in a double check valve assembly is
_____psig (kPa). Ans✓✓✓ 1 (6.9)
A DCVA check valve reading of 0.7 psid (48 kPa) during testing is
likely an indication of a: Ans✓✓✓ Check disc becoming soft
A deck-mounted atmospheric vacuum breaker's critical level is located
above its use by _______ inches. Ans✓✓✓ 1 (2.5)
A double check valve assembly may be used at the following
applications except: Ans✓✓✓ Irrigation sprinkler systems
A double check valve assembly must be installed above the floor by at
least _____ inches(cm). Ans✓✓✓ 12 (30)
, A dual check valve is not: Ans✓✓✓ in-line testable
A dual check valve provides protection against: Ans✓✓✓ Elevated
downstream pressure and negative supply pressure
A dual check valve with an intermediate vent shall not be installed on a:
Ans✓✓✓ Commercial boiler
A duplex gauge has _____hose(s). Ans✓✓✓ 2
A federal court can assess a civil penalty for maintaining a hazardous
connection of up to $____ per day. Ans✓✓✓ $15,000
A fluid's velocity increase results in a(n): Ans✓✓✓ Reduction in
pressure
A flushometer vacuum breaker must be installed above the fixture a
minimum of _____ inches (cm). Ans✓✓✓ 6 (15)
A hose bibb vacuum breaker contains a: Ans✓✓✓ Spring-loaded check
valve
answers
A backflow preventer may not be located in an area containing:
Ans✓✓✓ Toxic Fumes
A barometric loop protects the potable water supply from: Ans✓✓✓
Backsiphonage
A characteristic of the SVB operation is that the air inlet must seal
before the: Ans✓✓✓ Check valve opens.
A check valve closing differential in a double check valve assembly is
_____psig (kPa). Ans✓✓✓ 1 (6.9)
A DCVA check valve reading of 0.7 psid (48 kPa) during testing is
likely an indication of a: Ans✓✓✓ Check disc becoming soft
A deck-mounted atmospheric vacuum breaker's critical level is located
above its use by _______ inches. Ans✓✓✓ 1 (2.5)
A double check valve assembly may be used at the following
applications except: Ans✓✓✓ Irrigation sprinkler systems
A double check valve assembly must be installed above the floor by at
least _____ inches(cm). Ans✓✓✓ 12 (30)
, A dual check valve is not: Ans✓✓✓ in-line testable
A dual check valve provides protection against: Ans✓✓✓ Elevated
downstream pressure and negative supply pressure
A dual check valve with an intermediate vent shall not be installed on a:
Ans✓✓✓ Commercial boiler
A duplex gauge has _____hose(s). Ans✓✓✓ 2
A federal court can assess a civil penalty for maintaining a hazardous
connection of up to $____ per day. Ans✓✓✓ $15,000
A fluid's velocity increase results in a(n): Ans✓✓✓ Reduction in
pressure
A flushometer vacuum breaker must be installed above the fixture a
minimum of _____ inches (cm). Ans✓✓✓ 6 (15)
A hose bibb vacuum breaker contains a: Ans✓✓✓ Spring-loaded check
valve
