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5 Cards in this Set
- Front
- Back
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The back flow prevention method which consists of two independently acting check valves with an automatic operating pressure differential relief valve located between the two check valves is called: 1) Air gap back flow prevention 2) Double check valve 3) Atmosphere vacuum breaker 4) Reduced pressure principle device 5) PVB |
Reduced pressure principle device |
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Which of the following statements about a constant pressure system with a pneumatic tank is false? 1) Air must continuously be introduced into the tank 2) A system controller automatically starts a standby pump in the event of pump failure 3) This system is primarily used in larger buildings 4) Water entering directly into the pump suction is discharged into a pressurised tank 5) The system has a pressure regulator to maintain a relatively constant pressure above the water level inside the tank |
This system is primarily used in larger buildings |
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Temperature relief devices limit the temperature increase to about: 1) 90ºC 2) 50ºC 3) 121ºC 4) 79ºC 5) 99ºC |
99ºC |
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Building codes generally limit the highest pressure permissible in plumbing systems to: 1) 560 kPa 2) 490 kPa 3) 350 kPa 4) 600 kPa 5) 500 kPa |
560 kPa |
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Temperature relief devices are effective in eliminating which of the following problems? 1) Venting off air released from water during heating 2) Inadequate heating of the water 3) Water stagnation 4) Flashing of water to steam when faucets are opened |
Flashing of water to steam when faucets are opened |
